Yamaha 115C Owner'S Manual Download

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5-2

C. Engine idles

irregularly or stalls.

Trouble

Possible Cause

Remedy

1. Spark plug(s) fouled or incorrect

type.

2. Fuel system obstructed.

3. Fuel contaminated or stale.

4. Fuel filter clogged.

5. Failed ignition parts.

6. Warning system activated.

7. Spark plug gap incorrect.

8. Poor connections or damaged

ignition wiring.

9. Specified engine oil not used.

10. Thermostat faulty or clogged.

11. Carburetor adjustments incorrect.

12. Fuel pump damaged.

13. Air vent screw on the fuel tank

closed.

14. Choke knob pulled out.

15. Motor angle too high.

16. Carburetor clogged.

17. Fuel joint connection incorrect.

18. Throttle valve adjustment incorrect.

19. Battery lead disconnected.

1. Inspect spark plug(s). Clean or

replace with recommended type.

2. Check for pinched or kinked fuel

line or other obstructions in fuel

system.

3. Fill tank with clean, fresh fuel.

4. Clean or replace filter.

5. Have serviced by a Yamaha

dealer.

6. Find and correct cause of warning.

7. Inspect and adjust as specified.

8. Check wires for wear or breaks.

Tighten all loose connections.

Replace worn or broken wires.

9. Check and replace oil as specified.

10. Have serviced by a Yamaha

dealer.

11. Have serviced by a Yamaha

dealer.

12. Have serviced by a Yamaha

dealer.

13. Open the air vent screw.

14. Return to home position.

15. Return to normal operating

position.

16. Have serviced by a Yamaha

dealer.

17. Connect correctly.

18. Have serviced by a Yamaha

dealer.

19. Connect securely.

64C-9-18-5 3/13/03 10:21 AM Page 3

Summary of Contents for 115C

Page 1: ...115C 130C 150C V150C OWNER S MANUAL U S A Edition LIT 18626 05 45 ...

Page 2: ......

Page 3: ...cautions that must be taken to avoid damage to the outboard motor NOTE A NOTE provides key information to make procedures easier or clearer Yamaha continually seeks advance ments in product design and quality Therefore while this manual contains the most current product information available at the time of printing there may be minor discrepancies between your machine and this manual If there is a...

Page 4: ...EMA20010 CONTENTS GENERAL INFORMATION BASIC COMPONENTS OPERATION MAINTENANCE TROUBLE RECOVERY INDEX E 1 2 3 4 5 6 READ THIS OWNER S MANUAL CAREFULLY BEFORE OPERATING YOUR OUTBOARD MOTOR ...

Page 5: ...or serial number 1 1 Key number 1 1 EMISSION CONTROL INFORMATION 1 2 SAFETY INFORMATION 1 3 IMPORTANT LABELS 1 5 BASIC BOATING RULES 1 6 FUELING INSTRUCTIONS 1 10 Gasoline 1 11 Engine oil 1 11 BATTERY REQUIREMENT 1 12 PROPELLER SELECTION 1 12 START IN GEAR PROTECTION 1 14 1 2 3 4 5 6 E ...

Page 6: ...in ordering spare parts from your Yamaha dealer or for reference in case your out board motor is stolen 1 Outboard motor serial number EMU00008 KEY NUMBER If a main key switch is equipped with the motor the key identification number is stamped on your key as shown in the illustration Record this number in the space provided for reference in case you need a new key 1 Key number E 1 401012 904011 12...

Page 7: ...owl ing 1 Emission control information label Existing Technology N A Manufactured date label This label is attached to the clamp bracket or the swivel bracket 2 Manufactured date label EMISSION CONTROL INFORMATION ENGINE FAMILY THIS ENGINE CONFORMS TO 2001 U S EPA REGULATIONS FOR MARINE SI ENGINES REFER TO THE OWNERS MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS FELs SPARK PLUG DISPLACEMEN...

Page 8: ...fully Make sure there are no gas fumes or leaking fuel before starting the engine 8 This product emits exhaust gases which contain carbon monoxide a colorless odorless gas which may cause brain damage or death when inhaled Symp toms include nausea dizziness and drowsiness Keep cockpit and cabin areas well ventilated Avoid blocking exhaust outlets 8 Check throttle shift and steering for proper oper...

Page 9: ...ny organizations including the following United States Coast Guard Consumer Affairs Staff G BC Office of Boating Public and Consumer Affairs U S Coast Guard Headquarters Washington D C 20593 0001 Boating Safety Hotline 1 800 368 5647 National Marine Manufacturers Association NMMA 401 N Michigan Ave Chicago Il 60611 Marine Retailers Association of America 155 N Michigan Ave Chicago Il 60601 ...

Page 10: ...or an equivalent TC W3 certified outborad oil Do not add gasoline to the oil tank Fire or explosion could result OIL TANK CAPACITY 10 5 LITERS 11 1 U S qt 9 2 IMP qt WARNING Be sure shift control is in neutral before starting engine except 2HP Do not touch or remove electrical parts when starting or during operation Keep hands hair and clothes away from flywheel and other rotating parts while engi...

Page 11: ...ened ves sel These rules determine which vessel has the right of way and what each vessel should do Stand on Vessel The vessel with the right of way has the duty to continue its course and speed except to avoid an immediate collision When you maintain your direction and speed the other vessel will be able to determine how best to avoid you Give way Vessel The vessel which does not have the right o...

Page 12: ...n the risk of collision neither of you has the right of way Both of you should alter course to avoid an accident You should keep the other vessel on your port left side This rule doesn t apply if both of you will clear one another if you continue on your set course and speed Crossing When two power driven vessels are cross ing each other s path close enough to run the risk of collision the vessel ...

Page 13: ...d normally be given the right of way The exceptions to this are 1 When the sailing vessel is overtaking the power driven vessel the power dri ven vessel has the right of way 2 Sailing vessels should keep clear of any fishing vessel 3 In a narrow channel a sailing vessel should not hamper the safe passage of a power driven vessel which can navi gate only in such a channel Reading Buoys and Other Ma...

Page 14: ...viga MAIN CHANNEL BUOYS 1 3 5 7 tion Leave to port left proceeding upstream LIGHTED BUOY Port Hand White Light Green Light old new old new old new LIGHTED BUOY Starboard Hand 2 4 6 Even number increasing toward head of naviga tion Leave to starboard right proceeding up stream White Light Red Light A LIGHTED SAFE WATER BUOY No number Marks midchannel pass on either side Letter has no lateral signif...

Page 15: ...ly with dry rags 8 Do not overfill the fuel tank 8 Tighten the filler cap securely after refueling 8 If you should swallow some gasoline inhale a lot of gasoline vapor or get gasoline in your eyes get immediate medical attention 8 If any gasoline spills onto your skin immediately wash with soap and water Change clothing if gasoline spills on it 8 Touch the fuel nozzle to the filler open ing or fun...

Page 16: ...m dam age or engine performance problems EMU19570 ENGINE OIL Use Yamalube 2 M outboard oil If Yamalube 2 M is not available use only another outboard motor manufacturer s factory brand oil with TC W3 rating cC Serious engine damage can result from the use of lower quality oil including some commonly available oil brands with TC W3 on their label To avoid the risk use only Yamalube 2 M or if necess...

Page 17: ... cold cranking amps CCA SAE 380 amps at 18 C 0 4 F Minimum marine cranking amps MCA ABYC 502 amps at 0 C 32 F Minimum reserve capacity RC SAE 124 minutes EMU01395 PROPELLER SELECTION The performance of your outboard motor will be critically affected by your choice of propeller as an incorrect choice could adversely affect performance and could also seriously damage the motor Engine speed depends o...

Page 18: ...r outboard that is best suited to your application NOTE At full throttle and under a maximum boat load the engine s rpm should be within the upper half of the full throttle operating range as listed in SPECIFICA TIONS on page 4 1 Select a propeller which fulfills this requirement If operating under conditions which allow the engine s rpm to rise above the maxi mum recommended range such as light b...

Page 19: ...TION Yamaha outboard motors or Yamaha approved remote control units are equipped with start in gear protection device s This feature permits the engine to be started only when it is Neutral Always select Neutral before starting the engine ...

Page 20: ...E MEMO ...

Page 21: ...b 2 8 Trim tab 2 8 Power trim tilt switch 2 9 Digital tachometer 2 10 Digital speedometer 2 13 Fuel management meter 2 16 Tilt support lever 2 20 Top cowling lock levers 2 20 Top cowling release lever 2 20 Flushing device 2 21 WARNING SYSTEM 2 22 Overheat warning 2 22 Oil level warning Oil filter clogging warning 2 23 1 2 3 4 5 6 E ...

Page 22: ...ever 4 Anti cavitation plate 5 Trim tab Anode 6 Propeller 7 Cooling water inlet 8 Anode 9 Clamp bracket 0 Power trim and tilt unit q Cowling release lever 1 Cowling lock lever 2 w Choke knob e Top cowling r Cooling water pilot hole t Remote control box Side mount type y Digital tachometer u Digital speedmeter i Remote oil tank 1 V4 2 V6 May not be exactly as shown also may not be included as stand...

Page 23: ...device 3 Tilt support lever 4 Anti cavitation plate 5 Trim tab Anode 6 Propeller 7 Cooling water inlet 8 Anode 9 Clamp bracket 0 Power trim and tilt unit q Cowling lock lever w Choke knob e Top cowling r Cooling water pilot hole t Remote control box Side mount type y Digital tachometer u Digital speedmeter i Remote oil tank May not be exactly as shown also may not be included as standard equipment...

Page 24: ...the shifter and the throttle are actu ated by the remote control lever In addi tion this control also has the electrical switches 1 Remote control lever 2 Neutral interlock trigger 3 Neutral throttle lever 4 Main switch 5 Engine stop lanyard switch 6 Power trim tilt switch 7 Throttle friction adjusting screw ...

Page 25: ...ard 3 Reverse 4 Shift 5 Fully closed 6 Throttle 7 Fully open EMC50110 Neutral interlock trigger To shift out of Neutral the neutral inter lock trigger of the remote control lever must first be pulled up EMC50210 Neutral throttle lever To open the throttle without shifting into either Forward or Reverse place the remote control lever in the Neutral posi tion and lift the neutral throttle lever NOTE...

Page 26: ...d 8 ON Electrical circuits switched on The key cannot be removed 8 START Starter motor will turn and start engine When the key is released it returns auto matically to ON EMC50310 Choke switch While the main switch is being pressed in at ON or START the choke system will switch on to supply a rich mixture required to start the engine When the key is released it will switch off automati cally ...

Page 27: ...y under power w 8 Attach the engine stop switch lanyard to a secure place on your clothing your arm or leg while operating 8 Do not attach the lanyard to clothing that could tear loose Do not route the lanyard in such a way that it could become entangled preventing it from functioning 8 Avoid accidentally pulling the lanyard during normal operation Loss of engine power means the loss of most steer...

Page 28: ...OTE Refer to the sections ADJUSTING TRIM ANGLE and TILTING UP DOWN in Chapter 3 for instructions on usage 701035 EMU01155 Throttle Friction Adjusting Screw A friction device in the remote control box provides adjustable resistance to move ment of the remote control lever and can be set according to operator preference An adjusting screw is located on the front of the remote control box w Do not ov...

Page 29: ... tab 1 Trim tab 2 Bolt 3 Cap cC The trim tab also serves as an anode to protect the engine from electroche mical corrosion Never paint the trim tab as it will become ineffective as an anode Boat tends to veer To the left port side To the right starboard side The rear end of trim tab Turn the left port side A in the figure Turn the right starboard side B in the figure 2 8 EMC42010 CHOKE KNOB Pullin...

Page 30: ...wn When the switch button is released the motor will stop in its current position w Use the power trim tilt switch located on the bottom engine cowling only when the boat is at a complete stop with the engine off Attempting to use the cowl ing mounted power trim tilt switch while the boat is moving could increase the risk of falling overboard and could distract the operator increasing the risk of ...

Page 31: ...icator and the overheat warning indicator 1 Tachometer 2 Trim meter 3 Hour meter 4 Oil level indicator 5 Overheat warning indicator 6 Set button 7 Mode button NOTE All segments of the display will light momentarily after the main switch is turned on and will return to normal there after EMU00136 Tachometer This meter shows the engine speed ...

Page 32: ...urs Simultaneously pressing the SET and MODE buttons for more than 1 second while the trip hours are displayed resets the trip counter to 0 zero NOTE The total number of hours the engine has been run cannot be reset EMU01109 Trim Meter This meter shows the trim angle of your outboard motor NOTE 8 Memorize the trim angles that work best for your boat under different condi tions Adjust the trim angl...

Page 33: ...e has activated If neces sary refer to the TROUBLESHOOTING section in this manual Consult your deal er if the problem cannot be located and corrected EMU00138 Oil Level Indicator This indicator shows the engine oil level If the oil level falls below the lower limit the warning indicator will start to blink Refer to the sections FILLING OIL and OIL LEVEL WARNING for details 1 Oil level indicator cC...

Page 34: ...P TIME BATT Km h knot mph km mile SPEED YAMAHA set mode 802016 TRIP TIME BATT Km h knot mph km mile SPEED YAMAHA set mode q w e r EMD40012 DIGITAL SPEEDOMETER This meter contains the speedometer fuel meter with warning trip meter clock and voltmeter with warning 1 Speedometer 2 Fuel meter 3 Trip meter clock voltmeter 4 Warning indicator NOTE After the main switch is first turned on all portions of...

Page 35: ...ata will be lost if the battery is disconnected 802025 TRIP TIME BATT Km h knot mph km mile SPEED YAMAHA set mode EMU01275 Clock This meter shows the current time Repeatedly push and release the mode button until the indicator on the face of the meter points to TIME To set the clock be sure the meter is in the TIME mode Press the set button the hour display will begin blinking Press the mode butto...

Page 36: ...TIME BATT Km h knot mph km mile SPEED YAMAHA set mode q w 802026 TRIP TIME BATT Km h knot mph km mile SPEED q w EMD40310 Fuel meter The fuel level is displayed by eight seg ments When all segments are showing the fuel is full cC The Yamaha fuel tank sensor is different from a conventional type sensor A wrong setting of the selector switch on the meter will give incorrect readings Consult Yamaha de...

Page 37: ...ers will change to normal operation Watch the meter when turning on the main switch to make sure all segments come on 802021 TRIP TIME BATT Km h knot mph km mile SPEED YAMAHA P S gph I h ECON SYNC TTL FUEL MANAGEMENT set mode EMD32010 Fuel flow meter The meter displays fuel flow within one hour at the rate of current engine opera tion If twin engines are installed on your boat the meter will displ...

Page 38: ...GEMENT L g EMU01276 Fuel Consumption Meter This meter displays the total amount of fuel consumed since the meter was last reset Repeatedly push and release the mode button until the indicator on the face of the meter points to total TTL To reset the total fuel consumption to 0 press the set and mode buttons together NOTE 8 The meter displays gallon hour and liter depending upon operator preference...

Page 39: ...Yamaha digital speedometer and fuel management meter calculates speed miles traveled and fuel econo my by water movement at the stern of the boat This distance can vary greatly from the actual distance traveled because of water currents sea swells and the condition of the water speed sensor partially plugged or damaged 8 Individual engines may slightly vary in their fuel consumption due to manufac...

Page 40: ...s 4 Starboard side engine speed is slightly higher 5 Starboard side engine speed is higher NOTE If the two engines speeds are not syn chronized while cruising they can be syn chronized by adjusting trim angle or throttle P S mpg Km L gph I h ECON SYNC TTL FUEL MANAGEMENT q w e r t P S mpg Km L gph I h ECON SYNC TTL FUEL MANAGEMENT EMU01207 Water Separator Warning Indicator If the water which has b...

Page 41: ...cing the cowling check to be sure it fits properly in the rubber seal Then lock the cowling again by mov ing the levers downward 403033 301021 301022 V6 V6 301023 V4 EMD64010 TOP COWLING RELEASE LEVER V4 The top cowling can be removed by operat ing the cowling release lever Pulling the front lever unlocks the top cowl ing for removal When refitting the top cowling 1 Set the top cowling straight do...

Page 42: ...oks should be released at the same time If not adjust the cable adjuster for the rear clamps 8 Make sure the cable operates smooth ly and is free of corrosion 8 Check that the cable is properly secured in the holder 8 When reinstalling the cowling insure that both the front and rear locks have operated properly If the cowling has not been locked prop erly some parts may be damaged by the top cowli...

Page 43: ...vice If the engine temperature rises too high the warning device will activate 1 Included N A If the warning system has been activated stop the engine and check the water inlet for clogging Not equipped on all models 701054 605015 Activation of warning device The engine speed will automatically decrease to about 2 000 r min The overheat warning indicator will come on The buzzer will sound Tiller R...

Page 44: ...E The warning for oil filter clogging is simi lar to the warnings for low oil level and overheating For easy troubleshooting it is advisable to check for engine overheating first then oil level and finally oil filter clogging 1 Oil filter 001054 701054 213022 q 905012 q Warning device activation The engine speed will automatically decrease to about 2 000 r min The oil level warning indicator will ...

Page 45: ...ECK 3 9 Operation after a long period of storage 3 10 BREAKING IN ENGINE 3 11 STARTING ENGINE 3 13 WARMING UP ENGINE 3 17 SHIFTING 3 18 Forward 3 18 Reverse 3 18 STOPPING ENGINE 3 19 TRIMMING OUTBOARD MOTOR 3 20 Adjusting trim angle 3 21 TILTING UP DOWN 3 23 CRUISING IN OTHER CONDITIONS 3 25 Cruising in salt water 3 25 Cruising in turbid water 3 25 1 2 3 4 5 6 ...

Page 46: ...rne water spray while the boat is cruising Severe engine damage may result if the motor is operated continuously in the presence of airborne water spray NOTE During water testing check the buoyancy of the boat at rest with its maximum load Check that the static water level on the exhaust housing is low enough to prevent water entry into the powerhead when water rises due to waves when the outboard...

Page 47: ...he specific boat motor com bination 8 Your dealer or other person experi enced in proper rigging should mount the motor If you are mounting the motor yourself you should be trained by an experienced person permanent mounted type 8 Your dealer or other person experi enced in proper outboard motor mounting should show you how to mount your motor portable type Mount the outboard motor on the center l...

Page 48: ...ounting height is too high cavitation tends to occur thus reducing the propulsion and if the pro peller tips cut the air the engine speed will rise abnormally and cause the engine to overheat If the mounting height is too low the water resistance will increase and thereby reduce engine efficiency Mount the engine so that the anti cavita tion plate is in alignment with the bottom of the boat NOTE 8...

Page 49: ...s aromatics and oxy genates has increased These additives are important for the engines in passenger cars but they can have detrimental effects in marine engines particularly 2 cycle out boards because of increased deposits in the combustion chamber When enough deposits collect piston rings begin sticking Performance drops and engine wear increases dramatically While many additives available may r...

Page 50: ...e Oil level indicator in this chapter To fill the engine oil tank proceed as fol lows w Do not add gasoline into the oil tank Fire or explosion could result E Engine oil tank capacity See Chapter 4 Specifications 001475 EMU01824 When remote oil tank is used 115 130 1 Pour oil into the remote oil tank NOTE The oil level lines on the remote oil tank indicate the amount of additional oil that can be ...

Page 51: ...hen the engine oil tank is full 4 Proceed to start the engine Other wise the oil level warning system may prevent the engine from revving up cC When the engine is operated for the first time or stored for a period of time a min imum of 5 liters 5 3 US qt 4 4 Imp qt of oil should be kept in the remote oil tank Otherwise the oil feed pump chamber will not be filled with oil and no oil will be suppli...

Page 52: ...line indicates approxi mately 3 8 L 1 US gal 0 8 Imp gal can be added 2 Turn on the main switch The oil injection system will automatically feed oil from the remote oil tank to the engine oil tank 3 Operate the engine normally cC When the engine is operated for the first time or stored for a period of time a min imum of 5 liters 5 3 US qt 4 4 Imp qt of oil should be kept in the remote oil tank Oth...

Page 53: ... qt 0 26 Imp qt or less More than 300 cm3 0 32 US qt 0 26 Imp qt 300 cm3 0 32 US qt 0 26 Imp qt or less More than 1 500 cm3 1 6 US qt 1 31 Imp qt More than 1 500 cm3 1 6 US qt 1 31 Imp qt 1 500 cm3 1 6 US qt 1 31 Imp qt or less No refilling necessary Add oil refer to FILLING OIL Check oil filter for clogging Check battery cable con nection Buzzer will sound Engine speed is automati cally reduced t...

Page 54: ... and that there are no sharp objects near it Oil Check to be sure you have plenty of oil for your trip Controls Check throttle shift and steering for prop er operation before starting the engine The controls should work smoothly with out binding or unusual free play Look for loose or damaged connections Check operation of the starter and stop switches when the outboard moter is in the water Engine...

Page 55: ...ing operation 8 Keep hands hair and clothes away from the flywheel and other rotating parts while the engine is running 3 Watch for oil flowing through the oil feed pipes After any air in the oil lines has been expelled the oil injec tion system should supply oil normal ly If no oil is flowing after 10 minutes of idling consult your Yamaha dealer cC Be sure to take the above steps when operating t...

Page 56: ... break in in addition to oil in the oil injection system Break in time 10 hours Gasoline to engine oil premix ratio during break in 50 1 EMU00225 Gasoline petrol Engine oil mixing chart cC Make sure to mix gasoline petrol and oil completely otherwise your outboard motor may be damaged Mixing ratio 50 1 Gasoline Petrol Engine oil 0 48 L 0 51 US qt 0 42 Imp qt 24 L 6 3 US gal 5 3 Imp gal 0 28 L 0 30...

Page 57: ...ur Accelerate at full throttle onto plane then reduce engine speed to three quarter throttle approximately 4 000 r min Vary engine speed occasional ly Run at full throttle for one minute then allow about 10 minutes of opera tion at three quarter throttle or less to let the engine cool 4 Third through tenth hours Avoid operating at full throttle for more than 5 minutes at a time Let the engine cool...

Page 58: ... from open flames and sparks while loosening the air vent screw 8 This product emits exhaust gases which contain carbon monoxide a col orless odorless gas which may cause brain damage or death when inhaled Symptoms include nausea dizziness and drowsiness Keep cockpit and cabin areas well ventilated Avoid blocking exhaust outlets 1 If there is an air vent screw on the fuel tank cap loosen it 2 or 3...

Page 59: ...hing your arm or leg while operating 8 Do not attach the lanyard to clothing that could tear loose Do not route the lanyard where it could become entan gled preventing it from functioning 8 Avoid accidentally pulling the lanyard during normal operation Loss of engine power means the loss of most steering control Also without engine power the boat could slow rapidly This could cause people and obje...

Page 60: ...nd hold it for a maximum of 5 sec onds 10 Immediately after the engine starts release the main switch to return it to ON ON START OFF 701056 START OFF ON 701041 3 15 N 701014 EMU00948 Electric Start Model 7 Open the throttle slightly without shifting using the neutral throttle lever or the free accelerator After the engine starts return the throttle to the original position NOTE The rotation angle...

Page 61: ...ot keep the starter motor turning for more than 5 seconds The starter can be damaged The battery will also run down quickly making it harder to start the engine If the engine does not start within 5 seconds return the main switch to ON wait 10 sec onds and then crank the engine again ...

Page 62: ...ntinuous flow of water from the pilot hole shows that the water pump is pumping water through the cooling pas sages If water is not flowing out of the pilot hole at all times while the engine is running do not continue to run the engine Overheating and serious dam age could occur Stop the engine and check to see if the water inlet on the lower casing is blocked If the problem cannot be found and c...

Page 63: ...WARD Pull up the neutral interlock trigger If equipped and move the remote control lever quickly and firmly from Neutral to For ward REVERSE Pull up the neutral interlock trigger If equipped and move the remote control lever quickly and firmly from Neutral to Reverse w When operating in Reverse go slowly Do not open the throttle more than half Otherwise the boat may become unsta ble which could re...

Page 64: ...peed is not recommended EMG41511 1 Turn the main switch to OFF NOTE The engine can also be stopped by pulling the lanyard from the engine stop switch then turning the main switch to OFF 2 Tighten the air vent screw on the fuel tank cap after stopping the engine if it is equipped 3 Remove the key if the boat will be left unattended ON START OFF 701023 ...

Page 65: ... and propeller Correct trim is also affected by variables such as the load in the boat sea conditions and running speed w Excessive trim for the operating condi tions either trim up or trim down can cause boat instability and can make steering the boat more difficult This increases the possibility of an accident If the boat begins to feel unstable or is hard to steer slow down and or readjust the ...

Page 66: ...m tilt switch located on the bottom engine cowling if equipped only when the boat is at a complete stop with the engine off The outboard motor trim angle can be adjusted operating the power trim tilt switch 1 To raise the bow trim out push the switch UP To lower the bow trim in push the switch DN Make test runs with the trim set to differ ent angles to find the position that works best for your bo...

Page 67: ...nd economy are decreased because the hull of the boat is pushing the water and there is more air drag Excessive trim out can also cause the propeller to ventilate which reduces performance further and the boat may porpoise hop in the water which could throw the operator and passengers overboard Bow Down When the bow of the boat is down it is easier to accelerate from a standing start onto plane To...

Page 68: ...e is running Severe damage from overheating can result w Be sure all people are clear of the out board motor when adjusting the tilt angle also be careful not to pinch any body parts between the drive unit and engine bracket w Leaking fuel is a fire hazard Disconnect the fuel line or close the fuel cock if the engine will be tilted for more than a few minutes Otherwise fuel may leak If the fuel co...

Page 69: ...ock 2 Push the power trim tilt switch UP until the outboard has tilted up com pletely 302012 UP DOWN UP DN 403033 3 Turn the tilt support lever toward you and support the engine w After tilting the engine be sure to sup port it with the tilt support lever Other wise the engine could fall back down suddenly if oil in the power trim tilt unit should lose pressure ...

Page 70: ... tilt rod 2 Release the tilt support lever 3 Push the power trim and tilt switch DN Down to lower the engine to the desired position EMH60010 CRUISING IN OTHER CONDITIONS CRUISING IN SALT WATER After operating in salt water wash out the cooling water passages with fresh water to prevent them from becoming clogged up with salt deposits NOTE Refer to cooling system flushing instruc tions in STORING ...

Page 71: ...system 4 12 Cleaning fuel filter 4 13 Inspecting idling speed 4 14 Checking water trap under engine oil tank 4 15 Replacing fuse 4 16 Checking wiring and connectors 4 16 Exhaust leakage 4 16 Water leakage 4 16 Greasing 4 17 Checking power trim and tilt system 4 19 Checking propeller 4 20 Changing gear oil 4 22 Inspecting and replacing anode s 4 23 Checking battery 4 24 Checking bolts and nuts 4 28...

Page 72: ...INE 9 Engine type Number of cylinder Displacement cm3 cu in Bore stroke mm in 9 Ignition system 9 Spark plug NGK Spark plug gap mm in 9 Control system 9 Starting system 9 Battery Min cold cranking amps CCA SAE amps at 18 C 0 4 F Min marine cranking amps MCA ABYC amps at 0 C 32 F Min reserve capacity RC SAE minutes 9 Alternator output V A W 9 Starting carburation system 2 stroke 90 V 4 1 730 105 6 ...

Page 73: ...l Electric start 380 502 124 12 25 Choke valve start system Regular unleaded gasoline P O N minimum 86 Yamalube 2 M outboard oil or another outboard motor manufacture s factory brand oil with TC W3 oil injection system 0 9 0 95 0 79 10 5 11 1 9 2 18 0 19 1 15 9 Hypoid gear oil SAE90 980 33 1 34 5 Forward Neutral Reverse 1 86 26 14 Power trim tilt M 25 2 5 18 55 5 5 40 823 32 4 1 637 64 4 577 22 7 ...

Page 74: ...Do not use the tilt support lever knob when trailering the boat The outboard motor could shake loose from the tilt support and fall If the motor can not be trailered in the down position use an additional support device to secure it in the up position w 8 Never get under the lower unit while it is tilted even if a motor support bar is used Severe injury could occur if the outboard accidentally fal...

Page 75: ... season It is advisable to have your outboard motor serviced by an authorized Yamaha dealer prior to stor age However the following procedures can be performed by you the owner with a minimum of tools Filling Fuel Tank Fill the fuel tank with fresh fuel and add one ounce of Yamaha fuel conditioner and sta bilizer Part No LUB FUELC 12 00 to each gallon of fuel NOTE The use of Yamaha Fuel Conditione...

Page 76: ...oid running the outboard at high rpm while on the flushing attachment or overheating could occur w 8 Do not touch or remove electrical parts when starting or during opera tion 8 Keep hands hair and clothes away from flywheel and other rotating parts while engine is running 3 Run the engine at a fast idle for 10 15 minutes 4 Just prior to turning off the engine quickly spray Yamaha Stor Rite Engine...

Page 77: ...trol unit to completely fill the engine main tank Refer to the Troubleshooting section Temporary action in emergency 4 Change the lower unit oil Refer to the Periodic Cleaning and Inpsection sec tion Changing gear oil Inspect the oil for the presence of water which indi cates a leaky seal Seal replacement should be performed by an authorized Yamaha dealership prior to use 5 Grease all grease fitti...

Page 78: ...arging or using in a closed space Always wear eye protection when working near batteries KEEP OUT OF REACH OF CHILDREN NOTE Batteries vary among manufacturers Therefore the following procedures may not always apply Consult your battery manu facturer s instructions 1 Disconnect and remove the battery from the boat Always disconnect the black negative lead first to prevent the risk of shorting 2 Cle...

Page 79: ...the emission control system must be performed by an authorized Yamaha marine dealership A service manual is available for purchase through a Yamaha dealer for owners who have the mechanical skills tools and other equipment necessary to perform maintenance not covered by this owner s manual EMK33011 REPLACEMENT PARTS If replacement parts are necessary use only genuine Yamaha parts or equiva lents o...

Page 80: ...replacement Greasing points Greasing Gear oil Change Fuel system Inspection Fuel filter can be disassembled Inspection cleaning Fuel tank Yamaha portable tank Inspection cleaning Idling speed carburetor models Inspection adjustment 1 1 Anode s external Inspection replacement 1 1 Anode s internal Inspection replacement 1 Cooling water passages Cleaning Propeller and cotter pin Inspection replacemen...

Page 81: ...air leak or carburetion problem in that cylinder Do not attempt to diagnose any problems yourself Instead take the outboard motor to a Yamaha dealer You should periodically remove and inspect the spark plug because heat and deposits will cause the spark plug to slowly break down and erode If electrode erosion becomes excessive or if carbon and other deposits are excessive you should replace the sp...

Page 82: ... to 1 2 a turn past finger tight Have the spark plug adjusted to the correct torque as soon as possible with a torque wrench 1 Spark plug gap 2 Spark plug I D mark NGK 903022 q w Spark plug torque Refer to SPECIFICATIONS page 4 1 Initial of spark plug Plug wrench size I D mark B 21 mm 13 16 in C BK 16 mm 5 8 in D 18 3 mm 23 32 in EMU16350 CHECKING TOP COWLING Check the fitting of the top cowling b...

Page 83: ...t should be repaired immediately by Yamaha dealer or other qualified mechanic Checking points 8 Fuel system parts leakage 8 Fuel hose joint leakage 8 Fuel hose cracks or other damage 8 Fuel connector leakage w Leaking fuel can result in fire or explo sion 8 Check for fuel leakage regularly 8 If any fuel leakage is found the fuel system must be repaired by a qualified mechanic Improper repairs can ...

Page 84: ...assembled carefully with O ring filter cup and hoses in place Improper assembly can result in a fuel leak which could result in a fire or explosion hazard EMU09782 1 Remove the nut holding the fuel filter assembly if equipped 2 Unscrew the filter cup 1 catching any spilled fuel in a rag 3 Remove the filter element 2 and wash it in solvent Allow it to dry Inspect the filter element and O ring 3 to ...

Page 85: ...edure Results may vary depending on whether testing is conduct ed with the flushing attachment in a test tank or with the outboard motor in the water 1 Start the engine and allow it to warm up fully in neutral until it is running smoothly If the outboard motor is mounted on a boat be sure the boat is tightly moored 2 Verify whether the idle speed is set to specification For idle speed specifica ti...

Page 86: ...ormal If you have difficulty verifying the idle speed or the idle speed requires adjustment consult a Yamaha dealer or other qualified mechan ic 213021 q w EMK56010 CHECKING WATER TRAP UNDER ENGINE OIL TANK There is a trap at the bottom of the engine oil tank If water or foreign matter is visible in this trap consult a Yamaha dealer 1 Trap 2 Engine oil tank ...

Page 87: ...e new fuse blows again immediately consult a Yamaha dealer 1 Fuse holder 2 Fuse 20A 30A EMK78010 CHECKING WIRING AND CONNECTORS 1 Check that each grounding wire is prop erly secured 2 Check that each connector is engaged securely EXHAUST LEAKAGE Start the engine and check that no exhaust leaks from the joints between the exhaust cover cylinder head and crank case WATER LEAKAGE Start the engine and...

Page 88: ...E 4 17 EMU00366 GREASING Yamaha marine grease Water resistant grease V4 103061 ...

Page 89: ...E 4 18 EMU00366 GREASING Yamaha marine grease Water resistant grease V6 103062 ...

Page 90: ... and check that the tilt rod and trim rods are pushed out completely 4 Use the tilt support lever to lock the motor in the UP position Operate the tilt down switch briefly so the motor is supported the tilt support lever 5 Check that the tilt rod and trim rods are free of corrosion or other flaws 6 Activate the tilt down switch until the trim rods have gone completely into the cylinders 7 Activate...

Page 91: ... lanyard from the engine stop switch Turn off the battery cut off switch if your boat has one 8 Do not use your hand to hold the pro peller when loosening or tightening the propeller nut Put a wood block between the cavitation plate and the propeller to prevent the propeller from turning 1 Check each of the propeller blades for wear erosion from cavitation or ventila tion or other damage 2 Check t...

Page 92: ...before installing propeller otherwise lower case and propeller boss may be damaged 3 Tighten the propeller nut to the specified torque 4 Align the propeller nut with the propeller shaft hole Insert a new cotter pin in the hole and bend the cotter pin ends NOTE When the propeller nut does not align with the propeller shaft hole after tightening to the specified torque then tighten it more to align ...

Page 93: ...that the oil drain plug is at the lowest point possi ble 2 Place a suitable container under the gear case 3 Remove the oil drain plug 1 NOTE The oil drain plug is magnetic Remove all metal particles from the plug before rein stalling it 4 Remove the oil level plug 2 to allow the oil to drain completely cC Inspect the used oil after it has been drained If the oil is milky water is get ting into the...

Page 94: ...acity Refer to SPECIFICATIONS page 4 1 EMU14622 INSPECTING AND REPLACING ANODE S Yamaha outboard motors are protected from corrosion by sacrificial anodes Inspect the external anodes periodically Remove scales from the surfaces of the anodes Consult a Yamaha dealer for replacement of external anodes cC Do not paint anodes as this would ren der them ineffective NOTE Inspect ground leads attached to...

Page 95: ...lush with water 8 EYES Flush with water for 15 minutes and get immediate medical attention Antidote INTERNAL 8 Drink large quantities of water or milk followed by milk of magnesia beaten egg or vegetable oil Get immediate medical attention Batteries also generate explosive hydro gen gas therefore you should always fol low these preventive measures 8 Charge batteries in a well ventilated area 8 Kee...

Page 96: ...ter suitable to use in batteries 2 Always keep the battery in a good state of charge Installing a voltmeter will help you monitor your battery If you will not use the boat for a month or more remove the battery from the boat and store it in a cool dark place Completely recharge the battery before using it 3 If the battery will be stored for longer than a month check the specific grav ity of the fl...

Page 97: ...nstalling the battery and disconnect the RED lead last when removing it Otherwise the electrical system can be damaged 8 The electrical contacts of the battery and cables must be clean and properly connected or the battery will not start the engine Connect the RED lead to the POSITIVE terminal first Then connect the BLACK lead to the NEGATIVE terminal 8 Using a single battery Connect both red cabl...

Page 98: ...y Use a connecting cable between the terminals of the starting battery and accessory battery See the illustrations of the wiring connections This cable must be made from wire equivalent to the start ing battery cable 3 w Use of smaller wire could lead to a fire 1 Battery for starting 2 Battery for accessories 3 Large red lead for starting battery 4 Small red lead for accessory battery charg ing 5 ...

Page 99: ...rough the cooling passages for about 15 minutes Turn off the water and dis connect the garden hose 3 4 When flushing is complete reinstall the garden hose connector 2 on the fitting 1 on the bottom cowling Tighten the connector securely EML40010 CHECKING BOLTS AND NUTS 1 Check that bolts securing the cylinder head and engine and the nut securing the flywheel are tightened with their specified tigh...

Page 100: ... system flushing instructions in TRANSPORTING AND STORING OUTBOARD MOTOR EMU00412 Checking Painted Surface of Motor Check the motor for scratches nicks or flaking paint Areas with damaged paint are more likely to corrode If necessary clean and paint the areas A touch up paint is available from a Yamaha dealer 102025 EMU00413 COATING THE BOAT BOTTOM A clean hull improves boat performance The boat b...

Page 101: ...TEMPORARY ACTION IN EMERGENCY 5 5 Impact damage 5 5 Power trim tilt will not operate 5 5 Starter will not operate 5 6 Engine fails to operate 5 8 Low oil level warning activates 5 9 Top cowling does not unlock 5 10 Treatment of submerged motor 5 11 1 2 3 4 5 6 ...

Page 102: ...ric overload and repair Replace fuse with one of correct amperage 4 Have serviced by a Yamaha dealer 5 Shift to neutral B Engine will not start Starter operates 1 Fuel tank empty 2 Fuel contaminated or stale 3 Fuel filter clogged 4 Starting procedure incorrect 5 Fuel pump malfunctions 6 Spark plug s fouled or incorrect type 7 Spark plug cap s fitted incorrectly 8 Poor connections or damaged igniti...

Page 103: ...ve adjustment incorrect 19 Battery lead disconnected 1 Inspect spark plug s Clean or replace with recommended type 2 Check for pinched or kinked fuel line or other obstructions in fuel system 3 Fill tank with clean fresh fuel 4 Clean or replace filter 5 Have serviced by a Yamaha dealer 6 Find and correct cause of warning 7 Inspect and adjust as specified 8 Check wires for wear or breaks Tighten al...

Page 104: ... filter cup 1 Propeller damaged 2 Propeller pitch or diameter incorrect 3 Trim angle incorrect 4 Motor mounted at incorrect height on transom 5 Warning system activated 6 Boat bottom fouled with marine growth 7 Spark plug s fouled or incorrect type 8 Weeds or other foreign matter tangled on gear housing 9 Fuel system obstructed 10 Fuel filter clogged 11 Fuel contaminated or stale 12 Spark plug gap...

Page 105: ...amaha dealer 15 Check and replace oil with specified type 16 Have serviced by a Yamaha dealer 17 Open the air vent screw 18 Have serviced by a Yamaha dealer 19 Connect correctly 20 Inspect spark plug and replace it with recommended type E Engine power loss F Engine vibrates excessively 1 Propeller damaged 2 Propeller shaft damaged 3 Weeds or other foreign matter tangled on propeller 4 Motor mounti...

Page 106: ...oat for damage 3 Whether damage is found or not return to the nearest harbor slowly and carefully 4 Have a Yamaha dealer inspect the outboard motor before operating it again EMG65210 POWER TRIM TILT WILL NOT OPERATE If the engine cannot be tilted up or down with the power trim and tilt because of a discharged battery or a failure with the power trim and tilt unit the engine can be tilted manually ...

Page 107: ...pectedly start to move which could result in an accident 8 Be sure no one is standing behind you when pulling the starter rope It could whip behind you and injure someone 8 An unguarded rotating flywheel is very dangerous Keep loose clothing and other objects away when starting the engine Use the emergency starter rope only as instructed Do not touch the flywheel or other moving parts when the eng...

Page 108: ...case choke switch will not oper ate Pull out the choke knob when engine is cold 8 Without setting the main switch to ON it is impossible to start the engine 4 To start the engine with the emergency starter rope insert the knotted end of the rope into the notch in the flywheel rotor and wind the rope several turns clockwise Then give a strong pull straight out to crank the engine Repeat if necessar...

Page 109: ...top In such a case discon nect the connection on the yellow cord emergency circuit to return to port w When the connection is disconnected the idling and low speeds are slightly higher than normal Use care when start ing off or stopping 1 CDI unit 2 Yellow cord cC Follow this procedure only in an emer gency and just long enough to return to port for repairs E 220013 216013 q w ...

Page 110: ... too long too much oil will be pumped into the engine tank overflowing it Release the switch when oil reaches the upper level line on the engine oil tank 8 Do not use this emergency procedure unless the oil level warning lamps are installed and working 1 Remove the top cowling 2 Turn the main switch to the ON position 3 Lift the emergency switch to pump reserve oil in remote oil tank into the engi...

Page 111: ...Pull the cowling release lever 1 to unlock the front lock 2 Pull the emergency cowling release wire 2 coming out of the hole on the side of the pilot hole in the bottom cowling to release the port side rear lock 3 Lift the port side of the top cowling to pull out the emergency cowling release wire 3 from the port side of the bottom cowling 4 Pull the emergency cowling release wire 3 to release the...

Page 112: ...Thoroughly wash away mud salt sea weed etc with fresh water 2 Remove the spark plugs and face the spark plug holes downward to allow any water mud or contaminants to drain 3 Drain the fuel from the carburetor 4 Feed fogging oil or engine oil through the carburetors and spark plug holes while cranking with the manual starter or emergency starter rope 5 Take the outboard motor to a Yamaha dealer as ...

Page 113: ...EMP00010 Chapter 6 INDEX INDEX 6 1 E 1 2 3 4 5 6 ...

Page 114: ...ther conditions 3 25 Cruising in salt water 3 25 Cruising in turbid water 3 25 D Digital speedometer 2 13 Digital tachometer 2 10 Disconnecting the battery 4 27 E Emission control information 1 2 Engine fails to operate 5 8 Engine oil 1 11 Engine stop lanyard switch 2 6 Exhaust leakage 4 16 F Filling fuel 3 4 Filling fuel and engine oil 3 4 Filling fuel tank 4 4 Filling oil 3 5 Flushing cooling sy...

Page 115: ...Reverse 3 18 S Safety information 1 3 Shifting 3 18 Specifications 4 1 Speedometer 2 13 Start in gear protection 1 14 Starter will not operate 5 6 Starting engine 3 13 Stopping engine 3 19 Storing outboard motor 4 4 T Tachometer 2 10 Temporary action in emergency 5 5 Throttle friction adjusting screw 2 7 Tilt support lever 2 20 Tilting up down 3 23 Top cowling does not unlock 5 10 Top cowling lock...

Page 116: ...istration records are checked 2 Read the Limited Warranty statement which follows these instructions This warranty applies to Yamaha outboard motors sold in the United States whether purchased separately or when supplied as original equipment by a boat builder The terms also apply to original equipment packages sold in Canada with coverage provided by Yamaha Motor Canada see Warranty Guide for Can...

Page 117: ...lable in one country may not be sold or serviced in the other 6 If you need any additional information about your Yamaha or warranty coverage which your dealer cannot provide please contact us directly Yamaha Motor Corporation U S A P O Box 6555 Cypress CA 90630 Attention Customer Relations Department Telephone No 714 761 7439 Fax No 714 761 7559 Yamaha Motor Canada Ltd 480 Gordon Baker Road Toron...

Page 118: ...tor purchased and registered for use in the United States only excluding its territories For warranty provisions outside the United States contact the particular country s local Yamaha distributor WARRANTY REGISTRATION To be eligible for warranty coverage the outboard motor must first be registered with Yamaha Motor Corporation U S A A warranty registration form is provided in the Owner s Manual w...

Page 119: ...LSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE YAMAHA MOTOR CORPORATION U S A Post Office Box 6555 Cypress California 90630 WARRANTY QUESTIONS AND ANSWERS Q What costs are my responsibility during the warranty period A The customer s responsibility includes all costs of normal maintenance services non warranty repairs accident and collision damages Q What are some examples of abnormal strain...

Page 120: ...ation such as names addresses model engine serial number dates and receipts CHANGE OF ADDRESS The federal government requires each manufacturer of a motor vehicle to maintain a complete up to date list of all first purchasers against the possibility of a safety related defect and recall This list is complied from the purchase registrations sent to Yamaha Motor Corporation U S A by the selling deal...

Page 121: ...l receive service If you need more information about your warranty coverage or your Yamaha outside the U S A or Canada please contact an authorized Yamaha dealer in your country 2 Keep a copy of your sales contract or invoice for the purchase of your Yamaha and present it if you need warranty repairs This document should show the date of purchase which is important evidence the repairing dealer wi...

Page 122: ...Printed in Japan March 2003 0 5 1 64C 28199 18 115CETO 130BETO 150FETO 150GETO E Printed on recycled paper ...

Page 123: ...r au détail OUTBOARD MOTOR MODEL AND SERIAL NUMBER From I D label on clamp bracket MODÉLE ET NO DE SÉRIE DU MOTEUR HORS BORD sur l étiquette d identification de la presse de fixation For Dealer Use Only A l usage du concessionnaire YAMAHA DEALER NUMBER NO DU CONCESSIONNAIRE YAMAHA DEALER NAME NOM DU CONCESSIONNAIRE DATE SOLD DATE DE LIVRAISON OWNER S NAME NOM DU PROPRIÉTAIRE ADDRESS ADRESSE PHONE ...

Page 124: ...PLACE POSTAGE HERE ATTN WARRANTY DEPARTMENT Warranty card 2 27 02 11 47 AM Page 2 ...

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Yamaha 115C, Owner'S Manual

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