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Yamaha 40C, Owner'S Manual

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Yamaha 40C Owner'S Manual Download Page 16

EMU01804

GASOLINE

If knocking or pinging occurs, use a differ-
ent brand of gasoline or premium unlead-
ed fuel.

EMU00027

Gasohol

There are two types of gasohol: gasohol
containing ethanol and that containing
methanol. Gasohol containing ethanol
can be used if ethanol content does not
exceed 10% and the fuel meets minimum
octane ratings. Gasohol containing
methanol is not recommended by Yama-
ha because it can cause fuel system dam-
age or engine performance problems.

E

1-11

Recommended gasoline:

Regular unleaded gasoline with a
minimum octane rating of 86
(Pump Octane Number) = (R+M)/2

EMU00858

ENGINE OIL

If the recommended engine oil is not
available, another 2-stroke engine oil with
a NMMA-certified TC-W3 rating may be
used.

Recommended engine oil:
YAMALUBE 2 STROKE OUTBOARD OIL

 63B-9-1B-1  2/27/03 2:56 PM  Page 16

Summary of Contents for 40C

Page 1: ...40C 50C OWNER S MANUAL U S A Edition LIT 18626 05 44...

Page 2: ......

Page 3: ...cial precautions 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 de...

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

Page 5: ...utboard motor 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...

Page 6: ...er in the spaces provided to assist you 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 ma...

Page 7: ...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 I...

Page 8: ...ully Make sure there are no gas fumes or leaking fuel before starting the engine Q 8 This product emits exhaust gases which contain carbon monoxide a colorless odorless gas which may cause brain damag...

Page 9: ...y 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 Boati...

Page 10: ...ARNING 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 an...

Page 11: ...dened vessel 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 excep...

Page 12: ...are close enough to run 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...

Page 13: ...e passage of other vessels in narrow channels 1 8 Sailing vessel right of way Sailing vessels should normally be given the right of way The exceptions to this are 1 When the sailing vessel is overtaki...

Page 14: ...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 significa...

Page 15: ...ely 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 ge...

Page 16: ...10 and the fuel meets minimum octane ratings Gasohol containing methanol is not recommended by Yama ha because it can cause fuel system dam age or engine performance problems E 1 11 Recommended gasol...

Page 17: ...the electric system could perform poorly or be overloaded causing electric system damage For electric start models choose a battery which meets the following specifications EMU01859 Minimum cold cran...

Page 18: ...verse effect on the engine Yamaha outboard motors are fitted with propellers chosen to perform well over a range of applications but there may be uses where a propeller with a different pitch would be...

Page 19: ...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 whic...

Page 20: ...E MEMO...

Page 21: ...LS AND OTHER FUNCTIONS 2 2 Fuel tank 2 2 Remote control 2 3 Power trim tilt switch 2 7 Warning indicator 2 8 Digital tachometer 2 9 Trim tab 2 12 Tilt support lever 2 13 Top cowling lock lever 2 13 WA...

Page 22: ...Clamp bracket 4 Battery lead 5 Anode 6 Cooling water inlet 7 Propeller 8 Trim tab Anode 9 Anti cavitation plate 0 Anode q Trim angle adjusting rod w Tilt support lever e Top cowling r Remote control b...

Page 23: ...crew If equipped EMC31010 Fuel hose joint This connector is provided for connecting or disconnecting fuel hose EMC41110 Fuel meter This meter is on the fuel tank cap It shows current fuel quantity in...

Page 24: ...h if equipped 7 Throttle friction adjusting screw 701011 w q e r t y u R N F q w e r t y u u t r y 701031 EMC50010 Remote control lever Moving the lever forward from the Neu tral position engages Forw...

Page 25: ...ever will operate only when the remote control lever is in Neu tral The remote control lever will operate only when the neutral throttle lever is in the closed position 1 Fully open 2 Fully closed N 7...

Page 26: ...e control lever grip Pushing the switch UP trims the motor up then tilts the motor up Pressing the switch DN tilts the motor down and trims the motor down When the switch button is released the motor...

Page 27: ...r 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...

Page 28: ...ton is released the motor will stop in its current position E EMC87011 Throttle friction adjusting screw A friction device in the remote control box provides resistance to movement of the remote contr...

Page 29: ...ncreas ing the risk of collision with another boat or an obstacle NOTE Refer to the section Adjusting Trim Angle and Tilting Up Down for instructions on usage 303016 q 303012 q EMU00120 WARNING INDICA...

Page 30: ...cator 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...

Page 31: ...EMU01620 Hour Meter This meter shows the number of hours the engine has been run It can be set to show the total number of hours or the number of hours for the current trip The display can also be tur...

Page 32: ...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 t...

Page 33: ...ed to be sure steering is correct Be sure you have tightened the bolt after adjusting the trim tab 1 Trim tab 2 Bolt 3 Cap If equipped cC The trim tab also serves as an anode to protect the engine fro...

Page 34: ...n lock the tilt support lever to the clamp bracket 403011 EMD62011 TOP COWLING LOCK LEVER To remove the engine top cowling turn the lock lever Then lift off the cowling When replacing the cowling chec...

Page 35: ...for clogging 1 Digital tachometer EMD80010 WARNING SYSTEM cC Do not continue to operate the engine if the warning device has activated Consult your Yamaha dealer if the problem can not be located and...

Page 36: ...use NOTE 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...

Page 37: ...PERATION CHECKS 3 8 Operation after a long period of storage 3 9 BREAKING IN ENGINE 3 10 STARTING ENGINE 3 12 WARMING UP ENGINE 3 15 SHIFTING 3 16 Forward 3 16 Reverse 3 16 STOPPING ENGINE 3 17 TRIMMI...

Page 38: ...ne water spray while the boat is cruising Severe engine damage may result if the motor is operat ed continuously in the presence of air borne water spray NOTE During water testing check the buoyancy o...

Page 39: ...he specific boat motor combination 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 pe...

Page 40: ...If the mounting 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...

Page 41: ...on of lead from most fuels As gasoline has changed the amount of additives such as aromatics and oxy genates has increased These additives are important for the engines in passen ger cars but they can...

Page 42: ...ring break in Simply pour gasoline into the fuel tank and oil into the oil tank Convenient indicator segments indicate the status of the oil supply For details on reading the indicator segments see Oi...

Page 43: ...oil filler access cap on top of the top cowling counterclockwise and open it 2 Open the oil tank filler cap by pulling a tab on the cap 3 Slowly fill the engine oil into the engine oil tank 4 After fi...

Page 44: ...tachome ter Bottom cowling Engine oil tank No refilling necessary Green Add oil refer to oil filling Yellow Buzzer sounds in remote control box and engine speed is limited to about 2 000 r min to hel...

Page 45: ...ons to be sure they are tight 8 Be sure the fuel tank is positioned on a secure flat surface and that the fuel hose is not twisted or flattened or likely to contact sharp objects EMF43010 Controls 8 C...

Page 46: ...t the engine 2 Start the engine Leave it idling w 8 Do not touch or remove electrical parts when starting or during operation 8 Keep hands hair and clothes away from the flywheel and other rotating pa...

Page 47: ...break in will help ensure proper performance and longer engine life cC 8 Failure to follow the break in procedure could result in reduced engine life or even severe engine damage 8 Premix fuel must be...

Page 48: ...r 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 abo...

Page 49: ...ts 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 area...

Page 50: ...ock plate on the other end of the lanyard in the engine stop switch 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 lan...

Page 51: ...itch to START when the engine is running 8 Do not keep the starter motor turning for more than 5 seconds with the main switch in the START position If the engine does not start within 5 seconds return...

Page 52: ...ugh 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 damage could occur Stop the e...

Page 53: ...U00264 FORWARD Pull up the neutral interlock trigger if equipped and move the remote control lever quickly and firmly from Neutral to Forward N R 701044 EMU00269 REVERSE w When operating in reverse go...

Page 54: ...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 ON START OFF 701023 304036 902052 2 If the fuel joints...

Page 55: ...t engine 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 do...

Page 56: ...lt 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 swit...

Page 57: ...d 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...

Page 58: ...engine is running Severe damage from over heating can result 8 Do not tilt up the engine by pushing the steering handle as this could break the handle 8 Keep the power unit higher than the propeller...

Page 59: ...or 304036 UP DN 701034 UP DN 302013 DN UP 2 Push the power trim and tilt switch UP until the outboard has tilted up completely w Leaking fuel is a fire hazard Disconnect the fuel line if the engine wi...

Page 60: ...the outboard is to be used in turbid muddy water conditions 3 23 411035 EMG64110 PROCEDURE FOR TILTING DOWN Power trim and tilt model 1 Push the power trim and tilt switch UP until the engine is supp...

Page 61: ...ecking top cowling 4 13 Checking fuel system 4 14 Cleaning fuel filter 4 15 Inspecting idling speed 4 16 Checking water in engine oil tank 4 17 Replacing fuse 4 18 Checking wiring and connectors 4 18...

Page 62: ...em 8Propeller mark FUEL AND OIL TIGHTNING TORQUE 8Fuel Fuel tank capacity L US gal Imp gal 8Recommended engine oil Lubrication Engine oil capacity engine oil tank L US qt Imp qt 8Recommended gearcase...

Page 63: ...stem B8HS 10 0 9 1 0 0 035 0 039 Remote control Electric start 245 323 52 12 6 Prime start system Regular unleaded gasoline P O N minimum 86 YAMALUBE 2 STROKE OUTBOARD OIL or an equivalent TC W3 certi...

Page 64: ...o 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 additio...

Page 65: ...on 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 EMK2...

Page 66: ...ne top cowling and silencer cover 2 Install the outboard motor on the water tank and fill the tank with fresh water to above the level of the anti cavitation plate 1 Water surface 2 Lowest water level...

Page 67: ...ard at high speed while on the flushing attachment or overheating could occur w 8 Do not touch or remove electrical parts when starting or during operation 8 Keep hands hair and clothes away from flyw...

Page 68: ...ces sary to manually override the control unit to completely fill the engine main tank Refer to Oil level warning sec tion 4 Change the lower unit oil Refer to CHANGING GEAR OIL Inspect the oil for th...

Page 69: ...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...

Page 70: ...he 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 tool...

Page 71: ...leaning adjustment replacement Greasing points Greasing Gear oil Change Fuel system Inspection Fuel filter can be disassembled Inspection cleaning Fuel tank Yamaha portable tank Inspection cleaning Id...

Page 72: ...E 4 11 EMU00366 GREASING Yamaha marine grease Water resistant grease...

Page 73: ...ir 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...

Page 74: ...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 Refe...

Page 75: ...nd it should be repaired immediately by Yama ha 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 conne...

Page 76: ...e cup onto the filter housing 4 207035 000983 q w e r EMK50011 CLEANING FUEL FILTER w Gasoline petrol is highly flammable and its vapors are flammable and explosive 8 If you have any question about pr...

Page 77: ...rotating parts while engine is running cC This procedure must be performed while the outboard motor is in the water A flushing attachment or test tank can also be used A diagnostic tachometer should...

Page 78: ...e idle speed will measure higher than normal If you have difficulty verifying the idle speed or the idle speed requires adjustment consult a Yamaha dealer or other qualified mechan ic 213012 q w EMU03...

Page 79: ...zard NOTE If the new fuse blows again immediately consult a Yamaha dealer 1 Fuse holder 2 Fuse 20A 205015 q w EMK78010 CHECKING WIRING AND CONNECTORS 1 Check that each grounding wire is properly secur...

Page 80: ...gn of oil leaks 2 Operate each of the power trim and tilt switches on remote control and engine bottom cowling If equipped to check that all switches work 3 Tilt up the motor and check that the trim a...

Page 81: ...ut 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 preve...

Page 82: ...3 Tighten the propeller nut to the speci fied torque 4 Align the propeller nut with the pro peller shaft hole Insert a new cotter pin in the hole and bend the cotter pin ends NOTE When the propeller n...

Page 83: ...hat 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 fr...

Page 84: ...etrol is highly flammable and its vapors are flammable and explosive 8 If you have any question about properly doing this procedure consult your Yamaha dealer 8 Keep away from sparks cigarettes flames...

Page 85: ...lter to dry 3 Replace the gasket with a new one Reinstall the fuel hose joint assembly and tighten the screws firmly 902054 604012 405011 EMU14622 INSPECTING AND REPLACING ANODE S Yamaha outboard moto...

Page 86: ...ush 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 vegetab...

Page 87: ...er 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 th...

Page 88: ...cC 8 Make sure the main switch on applica ble models is OFF before working on the battery 8 Reversal of the battery leads will dam age the rectifier 8 Connect the RED lead first when installing the ba...

Page 89: ...Consult a Yamaha dealer for touch up paint 102024 102025 EML44010 COATING THE BOAT BOTTOM A clean hull improves boat performance The boat bottom should be kept as clean of marine growths as possible...

Page 90: ...E MEMO...

Page 91: ...apter 5 TROUBLE RECOVERY TROUBLESHOOTING 5 1 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 Treatment...

Page 92: ...ic 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...

Page 93: ...e 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 ta...

Page 94: ...ed 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 foule...

Page 95: ...maha 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 a...

Page 96: ...ct the boat 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 607011 EMG65110 PO...

Page 97: ...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 flywh...

Page 98: ...the engine is in Neutral and that the lanyard is attached to the engine stop switch The main switch must be on if the main switch is equipped on the elec tric start model NOTE Prime start model If th...

Page 99: ...011 OPEN CLOSE 001671 N 701014 2 Open the emergency starter valve located behind the silencer cover on the front side 3 Squeeze the priming pump two or three times to feed fuel 4 Turn the neutral thro...

Page 100: ...ssible for the starter motor to start the engine 7 Return the neutral throttle lever slow ly to its home position so that the engine does not stall 8 After the engine starts return the emergency start...

Page 101: ...Thoroughly wash away mud salt seaweed 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 ca...

Page 102: ...E MEMO...

Page 103: ...EMP00010 Chapter 6 INDEX INDEX 6 1 1 2 3 4 5 6 E...

Page 104: ...nnecting the battery 4 27 Cruising in other conditions 3 32 Cruising in salt water 3 32 Cruising in turbid water 3 32 D Digital tachometer 2 9 Disconnecting the battery 4 27 E Emission control informa...

Page 105: ...ts 4 9 Replacing fuse 4 18 Reverse 3 16 Ring free fuel additive 3 4 S Safety information 1 3 Shifting 3 16 Specifications 4 1 Start in gear protection 1 14 Starter will not operate 5 6 Starting engine...

Page 106: ...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 sepa ra...

Page 107: ...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 directl...

Page 108: ...or purchased and registered for use in the United States only excluding its territo ries For warranty provisions outside the United States contact the particular country s local Yamaha distributor WAR...

Page 109: ...SO 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 durin...

Page 110: ...tion 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...

Page 111: ...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 autho rized Yamaha dealer in your country 2 Keep a copy of your...

Page 112: ...Printed in Japan April 2003 0 5 1 63B 28199 1B 40VETO 50HETO E Printed on recycled paper...

Page 113: ...d tail OUTBOARD MOTOR MODEL AND SERIAL NUMBER From I D label on clamp bracket MOD LE ET NO DE S RIE DU MOTEUR HORS BORD sur l tiquette d identification de la presse de fixation For Dealer Use Only A...

Page 114: ...PLACE POSTAGE HERE ATTN WARRANTY DEPARTMENT Warranty card 2 27 02 11 47 AM Page 2...

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