Yamaha F50A Owner'S Manual Download Page 84

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4-23

EMU00397

Installing the Propeller

Be sure to install the thrust washer
before installing propeller, otherwise,
lower case and propeller boss may be
damaged.

Be sure to use a new cotter pin and
bend the ends over securely. Other-
wise, the propeller could come off dur-
ing operation and be lost.

Apply Yamaha Marine grease or Cor-
rosion resistant grease to the pro-
peller-shaft.

Install the thrust washer and propeller
on the propeller-shaft.

Install the spacer and washer. Tighten
the propeller nut to the specified
torque.

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:

If the propeller nut does not align with the
propeller shaft hole after tightening to the
specified torque, then tighten the nut fur-
ther to align it with the hole.

Tightening torque:
Refer to “SPECIFICATIONS” page 4-1.

602053

62Y-9-18-4 5/2/01 3:12 PM Page 24

Summary of Contents for F50A

Page 1: ...F50A T50A LIT 18626 04 72 F50A T50A OWNER S MANUAL U S A Edition 62Y 9 18 01 5 910 00AM y W 1 2 1 ...

Page 2: ...62Y 9 18 01 5 910 00AM y W 2 1 1 ...

Page 3: ...hat 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 any questio...

Page 4: ...62Y 9 18 1 5 16 01 10 18 AM Page 2 ...

Page 5: ... INFORMATION BASIC COMPONENTS OPERATION MAINTENANCE TROUBLE RECOVERY INDEX READ THIS OWNER S MANUAL CAREFULLY BEFORE OPERATING YOUR OUTBOARD MOTOR 1 2 3 4 5 6 EMA20010 CONTENTS 62Y 9 18 1 5 16 01 10 19 AM Page 3 ...

Page 6: ...62Y 9 18 1 5 16 01 10 19 AM Page 4 ...

Page 7: ... number 1 1 Key number 1 1 EMISSION CONTROL INFORMATION 1 2 SAFETY INFORMATION 1 4 IMPORTANT LABELS 1 6 BASIC BOATING RULES 1 7 FUELING INSTRUCTIONS 1 11 Gasoline Petrol 1 11 ENGINE OIL 1 13 BATTERY REQUIREMENT 1 14 PROPELLER SELECTION 1 14 START IN GEAR PROTECTION 1 16 1 62Y 9 18 1 5 16 01 10 19 AM Page 5 ...

Page 8: ...re 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 1 401012 904011 123 YAMAHA q YAMAHA...

Page 9: ... 4 stroke HPDI EM Manufactured date label This label is attached to the clamp brack et 2 Manufactured date label EMISSION CONTROL INFORMATION ENGINE FAMILY THIS ENGINE CONFORMS TO 2001 U S EPA REGULATIONS FOR MARINE SI ENGINES THIS ENGINE CONFORMS TO 2001 CALIFORNIA EMISSION REGULATIONS FOR SI MARINE ENGINES REFER TO THE OWNERS MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS FELs SPARK PLUG ...

Page 10: ... stroke engines These engines are equivalent to the U S EPA s 2006 stan dards for marine engines Two Stars Very Low Emission The two star label identifies engines that meet the Air Resources Board s 2004 exhaust emission standards Engines meeting these standards have 20 lower emissions than One Star Low Emission engines Three Stars Ultra Low Emission The three star label identifies engines that me...

Page 11: ...er traffic 8 Always watch carefully for swimmers during the engine operation 8 Stay away from swimming areas EMU00917 SAFETY INFORMATION 8 Before mounting or operating the out board motor read this entire manual Reading it should give you an under standing of the motor and its operation 8 Before operating the boat read any owner s or operator s manuals supplied with it and all labels Be sure you u...

Page 12: ...ncluding 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 62Y 9 18 1 5 16 01 10 19 ...

Page 13: ...ept 2HP ê Do not touch or remove electrical partsê when starting or during operation Keep hands hair and clothes away from flywheel and other rotating parts while engine is running 6A1 83625 41 CAUTION 62Y 13444 40 Transport and store the engine only as shown Otherwise engine damage could result from leaking oil 62Y 9 18 1 5 16 01 10 19 AM Page 11 ...

Page 14: ...e 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 of way has the dut...

Page 15: ...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 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 crossing each other s path close enough to run the risk of collision the ves...

Page 16: ...other vessels in narrow channels 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 overtaking the power driven vessel the power driven 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 dr...

Page 17: ...ead 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 significance used for No number Topmost band red preferred Top Mark White Light White Light OR OR LIGHTED PREFERRED CHANNEL TO RB L RG L PORT BUOY identification and location purposes channel is to left of buoy Letter ...

Page 18: ...gs 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 funnel to help pr...

Page 19: ...ed after every 300 hours of operation 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 cC Use only new cl...

Page 20: ... are shipped from the factory without engine oil NOTE If the recommended engine oil is not available then a multigrade type engine oil such as SF CC CD SG CC CD or SH CD can be used SAE API SE SF SG SH _ 4 32 68 104 F _ 20 0 20 40 C 10W 30 10W 40 20W 40 Engine oil quantity Refer to SPECIFICATIONS Page 4 1 000292 62Y 9 18 1 5 16 01 10 19 AM Page 18 ...

Page 21: ...mum cold crank performance 380 Amps at 17 8 C 0 F Minimum reserve capacity 124 minutes at 26 7 C 80 F 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 on the propeller size and boat load If engine speed i...

Page 22: ...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 boat loads reduce the throttle s...

Page 23: ...rd 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 62Y 9 18 1 5 16 01 10 19 AM Page 21 ...

Page 24: ...E MEMO 62Y 9 18 1 5 16 01 10 19 AM Page 22 ...

Page 25: ...nk 2 2 Remote control 2 3 Trim tab 2 7 Power trim tilt switch 2 8 Trim angle adjusting rod 2 8 Digital tachometer 2 9 Tilt support lever 2 12 Top cowling lock lever 2 12 Flushing device 2 12 WARNING SYSTEM 2 13 Overheat warning 2 13 Low oil pressure warning 2 14 1 2 3 4 5 6 E 62Y 9 18 2 5 16 01 10 23 AM Page 1 ...

Page 26: ... plate 6 Trim tab Anode 7 Propeller 8 Cooling water inlet 9 Trim angle adjusting rod 0 Clamp bracket q Tilt support lever w Power trim and tilt switch e Flushing device r Fuel joint t Remote control box y Digital tachometer May not be exactly as shown also may not be included as standard equipment on all models 62Y 9 18 2 5 16 01 10 23 AM Page 2 ...

Page 27: ...MC31010 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 the fuel tank approximately EMC51010 Fuel tank cap This cap is for filling fuel To remove it turn it counterclockwise EMC61010 Air vent screw This screw is on the fuel tank cap To loosen it turn it counterclockwise q w...

Page 28: ...adjusting screw EMC50010 Remote control lever Moving the lever forward from the Neu tral position engages Forward gear Pulling the lever back from Neutral engages Reverse The engine will contin ue to run at idle until the lever is moved about 35 a detent can be felt Moving the lever farther opens the throttle and the engine will begin to accelerate 1 Neutral 2 Forwar 3 Reverse 4 Shift 5 Fully clos...

Page 29: ...r 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 EMC48110 Main switch The main switch controls the ignition sys tem its operation is described below 8 OFF Electrical circuits switched off The key can be removed 8 ON Electrical circuits switched on The key cannot be removed 8 START Starter motor will tu...

Page 30: ... 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 steering control Also ...

Page 31: ...to the sections ADJUSTING TRIM ANGLE and TILTING UP DOWN in Chapter 3 for instructions on usage 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 overtighten the fri...

Page 32: ...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 from electrochemical corrosion Never paint the trim tab as it will become ineffective as an anode E 2 7 Boat tends to veer The fin of trim tab To the left Turn to the left port side A in the figure To the right Turn to the rig...

Page 33: ...cated 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 colli sion with another boat or an obstacle NOTE Refer to the section Adjusting Trim Angle and Tilting Up Down for in...

Page 34: ...arning indicator 1 Tachometer 2 Trim meter 3 Hour meter 4 Low oil pressure warning 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 001058 EMU00136 Tachometer This meter shows the engine speed 62Y 9 18 2 5 16 01 10 23 AM Page 10 ...

Page 35: ...er 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 turned on and off 8 Changing the display format Pressing the MODE button changes the display format in the following circular pattern Total hours Trip hours Display off 8 Resetting the trip hours Simultaneously pressing ...

Page 36: ... in the engine Use the Oil Level Gauge to check the remaining oil quantity Refer to the section CHECKING THE ENGINE OIL LEVEL for details 001061 q EMU01553 Overheat Warning Indicator If the engine temperature rises too high the warning indicator will start to blink Refer to OVERHEAT WARNING for details 1 Overheat warning indicator cC Do not continue to operate the engine if a warning device has ac...

Page 37: ...gain by moving the lever downward 000971 EMD60010 TILT SUPPORT LEVER To keep the outboard motor in the tilted up position lock the tilt support lever to the clamp bracket EMU01146 FLUSHING DEVICE This device 1 is used to clean the cooling water passages of the motor using a gar den hose and tap water NOTE Refer to Cleaning Cooling water Pas sages in Chapter 4 for instructions on usage 000280 q 62Y...

Page 38: ...ning device 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 605015 Activation of Tiller Remote warning device control control model model The engine speed will automatically 1 decrease to about 2 000 r min The overheat warning indicator 1 will come on The buzzer ...

Page 39: ...d oil as needed If the oil level is correct consult your Yamaha dealer cC Do not continue to run the engine if the low oil pressure lamp is ON Serious engine damage may occur 001086 Activation of Tiller Remote warning device control control model model Engine speed will automatically 1 decrease to about 2 000 r min The low oil pressure warning indicator 1 will come on The buzzer will sound 1 62Y 9...

Page 40: ...E MEMO 62Y 9 18 2 5 16 01 10 23 AM Page 16 ...

Page 41: ... BREAKING IN RUNNING IN ENGINE 3 7 STARTING ENGINE 3 8 WARMING UP ENGINE 3 11 SHIFTING 3 12 Forward 3 12 Reverse 3 12 STOPPING ENGINE 3 13 TRIMMING OUTBOARD MOTOR 3 14 Adjusting trim angle 3 15 TILTING UP DOWN 3 17 CRUISING IN OTHER CONDITIONS 3 19 Cruising in salt water 3 19 Cruising in turbid water 3 19 1 2 3 4 5 6 E 62Y 9 18 3 5 16 01 10 31 AM Page 1 ...

Page 42: ... 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 of the boat at rest with its maximum load Check that the static water level on the exhaust housing is low enough to pre vent water entry into the powerhead when water rises due to waves when the outboard is not running 00...

Page 43: ...t 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 line keel line o...

Page 44: ...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 The optimum mounting height of the outboard motor is affected by the boat motor combination Test runs at different heights can help determine the optimum mounting height 8 Refer to the section TRIMMING OUT BOARD MOTOR for instructions on setting the t...

Page 45: ... of additives such as aromatics and oxy genates has increased These additives are important for the engines in passen ger cars but they can have detrimental effects in marine engines because of increased deposits in the combustion chamber When enough deposits collect piston rings begin sticking Performance drops and engine wear increases dramati cally While many additives available may reduce depo...

Page 46: ...tank is positioned on a secure flat surface and that the fuel hose is not twisted or flattened or likely to contact sharp objects EMF42210 Oil 8 Check the level of the oil in the sump with the dipstick If necessary add oil to bring the level up to the upper mark EMF43010 Controls 8 Check throttle shift and steering for proper operation before starting the engine 8 The controls should work smoothly...

Page 47: ...outboard motor in an upright position not tilted 2 Pull out the oil dipstick and wipe it clean 3 Completely re insert the dipstick and pull out it again 4 Check the oil level using the dipstick to be sure the level falls between the upper and lower marks Fill with oil if it is below the lower mark or drain to the specified level if it is above the upper mark 1 Oil dipstick 2 Lower level mark 3 Upp...

Page 48: ... load in gear with a propeller installed as follows 1 For the first hour of operation Run the engine at 2 000 r min or at approximately half throttle 2 For the second hour of operation Run the engine at 3 000 r min or at approximately three quarter throttle and during this period run it at full throttle for approximately one minute every ten minutes 3 For the next eight hours of operation Avoid co...

Page 49: ...ontain 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 turns 2 If there is a fuel joint on the motor firmly connect the fuel line to the joint Then firmly conne...

Page 50: ...g or your arm or leg Then install the lock 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 lanyard to clothing that could tear loose Do not route the lanyard where it could become entan gled preventing from functioning 8 Avoid accidentally pulling the lan...

Page 51: ...Do not turn the main switch to START when the engine is running 8 Do not keep the starter motor turning for more than 5 seconds The battery will rapidly become exhausted and it will be impossible for it to start the engine If the engine does not start within 5 seconds return the main switch to ON wait 10 seconds and then crank the engine again ON 000978 START 62Y 9 18 3 5 16 01 10 31 AM Page 11 ...

Page 52: ... could occur Check the oil level and add oil if necessary If the cause for the low oil pressure warning lamp cannot be found consult your Yamaha dealer 8 A continuous flow of water from the pilot hole shows that the water pump is pumping water through the cooling passages 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 Overhe...

Page 53: ...ock trigger If equipped and move the remote control lever quickly and firmly from Neutral to Forward EMU00269 REVERSE w When operating in Reverse go slowly Do not open the throttle more than half Oth erwise the boat may become unstable which could result in loss of control and an accident Pull up the neutral interlock trigger If equipped and move the remote control lever quickly and firmly from Ne...

Page 54: ...l joints are provided discon nect the fuel line from the motor after stopping the engine 3 Tighten the air vent screw on the fuel tank cap after stopping the engine if it is equipped 4 Remove the key if the boat will be left unattended NOTE The engine can also be stopped by pulling the lanyard and removing the lock plate from the engine stop lanyard switch then turning the main switch to OFF 30401...

Page 55: ...rect 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 trim angle NOTE Re...

Page 56: ... 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 boat and operating cond...

Page 57: ... drag Excessive trim up can cause the propeller to ventilate which reduces performance further When trimmed out too much a boat may porpoise hop in the water which could throw the operator and pas sengers overboard EMG62110 Bow down When the bow of the boat is down it is easier to accelerate from a standing start onto plane Too much trim in causes the boat to plow through the water decreasing fuel...

Page 58: ...NG ENGINE Never tilt the motor while the engine 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 ...

Page 59: ...lt switch UP until the outboard has tilted up com pletely 3 Turn the tilt support lever toward engine bracket and support the engine w 8 After tilting the engine be sure to sup port it with the tilt support lever Oth erwise the engine could fall back down suddenly if oil in the power trim tilt unit should lose pressure 8 Never operate the engine while it is supported by the tilt support lever 62Y ...

Page 60: ...UTBOARD MOTOR CRUISING IN TURBID WATER It is strongly recommended that the optional chromium plated water pump kit be installed if the outboard is to be used in turbid muddy water conditions EMU00303 PROCEDURE FOR TILTING DOWN Power trim tilt model 1 Push the power trim tilt switch UP until the engine is supported by the tilt rod 2 Release the tilt support lever 3 Push the power trim tilt switch D...

Page 61: ...filter 4 14 Adjusting idling speed 4 16 Changing engine oil 4 17 Checking timing belt 4 19 Replacing fuse 4 20 Checking wiring and connectors 4 20 Exhaust leakage 4 20 Water leakage 4 20 Checking power trim and tilt system 4 21 Checking propeller 4 22 Changing gear oil 4 24 Cleaning fuel tank 4 25 Inspecting and replacing anode s 4 27 Checking battery 4 28 Checking bolts and nuts 4 31 Motor exteri...

Page 62: ...acity V AH Minimum cold crank performance Amps at 17 8 C 0 F Minimum reserve capacity minutes at 26 7 C 80 F 8Alternator output V A W 8Starting carburetion system 4 stroke L4 935 57 1 63 0 75 0 2 48 2 95 0 15 0 25 0 006 0 010 0 25 0 35 0 010 0 014 C D I system DPR6EA 9 0 8 0 9 0 031 0 035 Remote control Electric start 12 70 100 380 124 12 10 Prime start system DRIVE UNIT 8Gear positions Gear ratio...

Page 63: ...e start system 4 2 E 718 28 3 361 14 2 1 436 56 5 533 21 0 112 247 5 000 6 000 36 8 50 0 at 5 500 r min 900 1 000 Forward Neutral Reverse 2 30 13 30 Power trim tilt K Regular unleaded gasoline P O N minimum 86 4 stroke motor oil SE SF SG SH 10W 30 10W 40 20W 40 2 0 2 1 1 8 2 2 2 3 1 9 Hypoid gear oil SAE90 610 20 6 21 5 18 1 8 13 35 3 5 25 18 1 8 13 18 1 8 13 62Y 9 18 4 5 2 01 3 12 PM Page 3 ...

Page 64: ...her in a boat or car 8 DO NOT fill fuel container to maximum capacity Gasoline will expand consid erably as it warms up and can build up pressure in the fuel container This can cause fuel leakage and a potential fire hazard cC 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 ...

Page 65: ...ting and storing it 8 Do not place the engine on its side before the cooling water has drained from it completely or water may enter the cylinder through the exhaust port and cause problems 8 Store the engine in a dry well ventilat ed place not in direct sunlight 1 Vertical position 2 Horizontal position 000940 102012 1 2 EMK21010 Filling Fuel Tank Fill the fuel tank with fresh fuel and add one ou...

Page 66: ...unning the outboard 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 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 Fog...

Page 67: ... the lower unit oil Refer to CHANGING GEAR OIL Inspect the oil for the presence of water which indicates a leaky seal Seal replace ment should be performed by an authorized Yamaha dealership prior to use 4 Grease all grease fittings Refer to the GREASING EMK27011 Cleaning and Anti corrosion Measure 1 Wash down the exterior of the out board with fresh water and dry off completely 2 Spray the engine...

Page 68: ... 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 manufacturer 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 Clean the battery c...

Page 69: ...rol 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 of the same type a...

Page 70: ...e clearance Inspection Adjustment 1 1 Thermostat Inspection 1 Interval Item Initial Every Refer page 10 hours 50 hours 3 months 100 hours 6 months 200 hours 1 year EMK30510 MAINTENANCE CHART Frequency of maintenance operations may be adjusted according to the operating con ditions but the following table gives general guidelines The mark indicates the check ups which you may carry out yourself The...

Page 71: ...4 10 E EMU00366 GREASING Yamaha marine grease Water resistant grease 000567 62Y 9 18 4 5 2 01 3 12 PM Page 11 ...

Page 72: ...tion 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 spark plug with anoth...

Page 73: ...g a spark plug a good esti mate of the correct torque is 1 4 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 E Spark plug torque Refer to SPECIFICATIONS page 4 1 Initial of spark Plug wrench size plug I D mark B 21 mm 13 16 in C BK 16 mm 5 8 in D 18 3 mm 23 32 in 903022 q w 62Y 9 ...

Page 74: ...paired 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 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 make the outb...

Page 75: ...tely 8 The fuel filter must be reassembled carefully with O ring filter cup and hoses in place Improper assembly or replacement can result in a fuel leak which could result in a fire or explosion hazard 207011 000983 q w e r EMU00978 F50 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...

Page 76: ...t the filter ele ment and O ring 3 to make sure they are in good condition Replace them if necessary 4 Reinstall the filter element in the cup Make sure the O ring is in proper position in the cup Firmly screw the cup onto the filter housing 4 5 Attach the filter assembly to the bracket 6 Run the engine and check the filter and lines for leaks 5 Attach the filter assembly to the bracket with that ...

Page 77: ...Neutral until it is running smoothly If the outboard is mounted on a boat be sure the boat is tightly moored 2 Adjust the throttle stop screw to set the idling speed to specification see SPECIFICATIONS by turning the stop screw clockwise to increase the idling speed and turning it counter clockwise to decrease the idling speed NOTE Correct idling speed adjustment is only possible if the engine is ...

Page 78: ... when checking and changing the engine oil 8 If the oil level is above the upper level mark drain until the level meets the specified capacity Overfilling the oil may cause leakage or damage 1 Put the outboard motor in an upright position not tilted 2 Prepare a suitable container which can hold a larger amount than the engine oil capacity Loosen and remove the drain bolt 1 while hold ing the conta...

Page 79: ...the correct amount of oil through the filler hole Reinstall the filler cap 5 Start the engine and watch to make sure the low oil pressure warning lamp turns off Make sure that there are no oil leaks cC If the oil lamp does not turn off or if there are oil leaks stop the engine and find the cause Continued operation with a problem could cause severe engine damage If the problem cannot be found and ...

Page 80: ...dverse conditions such as extended trolling 201012 EMK74111 CHECKING TIMING BELT Inspect the timing belt and replace it if any of the following signs is observed 8 Cracks in the back of the belt or in the base of belt teeth 8 Excessive wear at the roots of cogs 8 Rubber portion swollen by oil 8 Belt surfaces roughened 8 Signs of wear on edges or outer surface of belt NOTE If the timing belt can be...

Page 81: ... from the joints between the exhaust cover cylinder head and crank case 000539 e q w EMU01329 REPLACING FUSE If the fuse has blown on an Electric start model open the fuse holder and replace the fuse with a new one of proper amper age w Be sure to use the specified fuse An incorrect fuse or a piece of wire may allow excessive current flow This could cause electrical system damage and a fire hazard...

Page 82: ...erate 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 and tilt rod 1 is pushed out com pletely 4 Check that the trim and tilt rod is free of corrosion or other flaws 5 Operate the motor to trim and tilt down Check that the trim and tilt rod operates smoothly NOTE If any oper...

Page 83: ...he 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 ven tilation or other damage 2 Check the splines for wear and dam age 3 Check for fish line winding around the propeller shaft Check the propeller shaft oil seal fo...

Page 84: ...rease to the pro peller shaft 2 Install the thrust washer and propeller on the propeller shaft 3 Install the spacer and washer Tighten the propeller nut to the specified 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 If the propeller nut does not align with the propeller shaft hole after tightening to the specif...

Page 85: ...ce a suitable container under the gear case 2 Remove the oil drain plug 1 NOTE The oil drain plug is magnetic Remove all metal particles from the plug before rein stalling it 3 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 gear case which can cause gear damage Consult a Yamaha dealer...

Page 86: ...ghly 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 or other sources of ignition when cleaning the fuel tank 8 Remove the fuel tank from the boat before cleaning it Work only outdoors in an area with good ventilation 8 Wipe up any spilled fuel immediately 8 Reas...

Page 87: ...e solvent completely To clean the fuel filter 1 Remove the screws holding the fuel hose joint assembly Pull the assem bly out of the tank 2 Clean the filter located on the end of the suction pipe in a suitable clean ing solvent Allow the filter to dry 3 Replace the gasket with a new one Reinstall the fuel hose joint assembly and tighten the screws firmly 902054 62Y 9 18 4 5 2 01 3 12 PM Page 27 ...

Page 88: ...orrosion by a sacrificial anode s Check the anode s periodically Remove the scales from surfaces of the anode s For the inspection and replacement of the anode s consult a Yamaha dealer cC Do not paint the anode s for this would render it ineffective 000553 000205 62Y 9 18 4 5 2 01 3 12 PM Page 28 ...

Page 89: ... 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 hydrogen gas therefore you should always follow these preventive mea sures 8 Charge batteries in a well ventilated area 8 Keep batteries away f...

Page 90: ...should not be used for topping up 2 Keep the battery always 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 f...

Page 91: ... 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 NEG ATIVE terminal 1 Red lead 2 Black lead 3 Battery UPPER LEVEL LOWER LEVEL 901012 q...

Page 92: ...0846 q w e EMU01172 CLEANING COOLING WATER PASSAGES Flushing device equipped model Perform this procedure right after opera tion for the most thorough flushing 1 After shutting off the engine unscrew the garden hose connector 2 from the fitting 1 on the bottom cowling 2 Screw the garden hose connector 2 onto a garden hose 3 which is con nected to a fresh water supply 3 With the engine off turn on ...

Page 93: ...not use anti fouling paint which includes copper or graphite These paints can cause more rapid engine corrosion cC Do not leave the garden hose connector loose on the bottom cowling fitting or let the hose hang free during normal opera tion Water will leak out of the connector instead of cooling the engine which can cause serious overheating Be sure the connector is tightened securely on the fit t...

Page 94: ...E MEMO 62Y 9 18 4 5 2 01 3 12 PM Page 34 ...

Page 95: ...LESHOOTING 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 of submerged motor 5 9 1 2 3 4 5 6 E 62Y 9 18 5 5 16 01 10 27 AM Page 1 ...

Page 96: ...place fuse with one of correct amperage 4 Have serviced by a Yamaha dealer 5 Attach lanyard 6 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 ignition wiring...

Page 97: ...orrect 18 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 connectio...

Page 98: ...itch 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 incorrect 1 Have propeller repaired or repla...

Page 99: ...ealer 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 21 Have serviced by a Yamaha dealer E Engine power loss F Engine vibrates excessively 1 Propeller damaged 2 Propeller shaft damaged 3 Weeds or other foreign matter tangle...

Page 100: ...ever damage is found or not found go back to a nearest harbor slowly and carefully 4 Have a Yamaha dealer inspection of the outboard motor before operating it again E 607011 EMG65110 POWER TRIM TILT WILL NOT OPER ATE 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 101: ...o 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 fly wheel or other moving parts when the engine is running ...

Page 102: ... engine stop lanyard switch The main switch must be ON 4 Insert the knotted end of the emer gency starter rope into the notch in the flywheel rotor and wind the rope several turns clockwise ON START OFF 701024 5 Pull the rope slowly until resistance is felt 6 Give a strong pull straight out to crank and start the engine Repeat if necessary NOTE Refer to ENGINE FAILS TO OPERATE for cold engine star...

Page 103: ...n models with neutral throttle limiter open throttle as far as it will go N 701014 ON 000978 START 3 Start the engine 4 If the engine still will not start open and close the throttle two or three times to feed additional fuel to the intake manifold by the accelerator pump of the carburetor 5 Then open the throttle halfway and start the engine 62Y 9 18 5 5 16 01 10 27 AM Page 9 ...

Page 104: ... to allow any water mud or contami nants to drain 3 Drain the fuel from the carburetor fuel filter and fuel line Drain the engine oil completely 4 Fill the sump with the fresh engine oil as the same quantity as the engine oil capacity 5 Feed engine fogging oil or engine oil through the carburetor s and spark plug hole s while cranking the engine with the manual starter or emergency starter rope 6 ...

Page 105: ...EMP00010 Chapter 6 INDEX INDEX 6 1 1 2 3 4 5 6 E 62Y 9 18 6 5 16 01 10 28 AM Page 1 ...

Page 106: ... 19 Cruising in salt water 3 19 Cruising in turbid water 3 19 D Digital tachometer 2 9 Disconnecting the battery 4 30 E Emission control information 1 2 Engine fails to operate 5 8 Engine stop lanyard switch 2 5 Engine oil 1 13 Exhaust leakage 4 20 F Filling fuel 3 4 Filling fuel tank 4 4 Flushing cooling system and fogging engine 4 5 Flushing device 2 12 Forward 3 12 Fueling instructions 1 11 Fue...

Page 107: ...cation data 4 1 Star labels 1 3 Start in gear protection 1 16 Starter will not operate 5 6 Starting engine 3 8 Stopping engine 3 13 Storing outboard motor 4 4 T Tachometer 2 9 Temporary action in emergency 5 5 Throttle friction adjusting screw 2 6 Tilting up down 3 17 Tilt support lever 2 12 Top cowling lock lever 2 12 Trailering outboard motor 4 3 Transporting and storing outboard motor 4 3 Treat...

Page 108: ...s 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 rately 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 Canadian models Th...

Page 109: ...try 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 Toronto Ontario M2H 3B...

Page 110: ... Tilt Assembly WARRANTY REGISTRATION To be eligible for warranty coverage the outboard motor must be registered with Yamaha Motor Corpora tion U S A Warranty registration can be accomplished by any authorized Yamaha Outboard Motor Dealer Upon receipt of the registra tion an Owner s Warranty Card will be sent by Yamaha to the registered purchaser OBTAINING REPAIRS UNDER WARRANTY To receive repairs ...

Page 111: ... A The customer s responsibility includes all costs of normal maintenance services non warranty repairs accident and collision dam ages Q What are some examples of abnormal strain neglect or abuse A These terms are general and overlap each other in areas Specific examples include Running the machine out of oil operating the machine with a broken or damaged part which causes another part to fail da...

Page 112: ...s 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 dealer at the time of ...

Page 113: ... 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 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 will need to be su...

Page 114: ...62Y 9 18 6 5 16 01 10 28 AM Page 10 ...

Page 115: ...GM6 9 05 6 0 10 13 16 59 ページ 6 7 ...

Page 116: ...F50A T50A Printed in Japan April 2001 0 7 1 62Y 28199 18 F50AET FT50BET E Printed on recycled paper OWN 62Y 9 18 01 5 910 00AM y W 1 1 1 ...

Page 117: ...F50A T50A LIT 18626 04 72 F50A T50A OWNER S MANUAL U S A Edition 62Y 9 18 01 5 910 00AM y W 1 2 1 ...

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Yamaha F50A, Owner'S Manual

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