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Yamaha F-20B, Owner'S Manual

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Yamaha F-20B Owner'S Manual Download Page 80

Maintenance

73

assembly. Pull the assembly out of the
tank.

4. Clean the filter (located on the end of the

suction pipe) in a suitable cleaning sol-
vent. Allow the filter to dry.

5. Replace the gasket with a new one. Re-

install the fuel joint assembly and tighten
the screws firmly.

EMU29317

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.

NOTICE

ECM00721

Do not paint anodes, as this would render
them ineffective.

TIP:

Inspect ground leads attached to external
anodes on equipped models. Consult a
Yamaha dealer for inspection and replace-
ment of internal anodes attached to the pow-
er unit.

EMU29324

Checking battery (for electric start 
models)

WARNING

EWM01903

Battery electrolyte is poisonous and
caustic, and batteries generate explosive
hydrogen gas. When working near the
battery:

Wear protective eye gear and rubber
gloves.

Do not smoke or bring any other source
of ignition near the battery.

The procedure for checking the battery var-
ies for different batteries. This procedure
contains typical checks that apply to many
batteries, but you should always refer to the
battery manufacturer’s instructions.

NOTICE

ECM01921

A poorly maintained battery will quickly
deteriorate.

1. Check the electrolyte level.

ZMU02066

ZMU05564

6AG-9-79-1E0.book  73 ページ  ２０１４年１１月１０日　月曜日　午後４時８分

Summary of Contents for F-20B

Page 1: ...Read this manual carefully before operating this outboard motor OWNER S MANUAL F9 9H F15C F20B 6AG 28199 79 E0 6AG 9 79 1E0 book 1 ページ ２０１４年１１月１０日 月曜日 午後４時８分 ...

Page 2: ...manual carefully before operating this outboard motor Keep this manual onboard in a waterproof bag when boating This manual should stay with the outboard motor if it is sold 6AG 9 79 1E0 book 1 ページ ２０１４年１１月１０日 月曜日 午後４時８分 ...

Page 3: ...s the most current prod uct information available at the time of print ing there may be minor discrepancies between your machine and this manual If there is any question concerning this manu al please consult your Yamaha dealer To ensure long product life Yamaha recom mends that you use the product and perform the specified periodic inspections and main tenance by correctly following the instruc t...

Page 4: ... S MANUAL 2014 by Yamaha Motor Co Ltd 1st Edition November 2014 All rights reserved Any reprinting or unauthorized use without the written permission of Yamaha Motor Co Ltd is expressly prohibited Printed in Japan 6AG 9 79 1E0 book 2 ページ ２０１４年１１月１０日 月曜日 午後４時８分 ...

Page 5: ...ements 12 Battery specifications 12 Mounting battery 12 Multiple batteries 12 Without a rectifier or Rectifier Regulator 12 Propeller selection 13 Start in gear protection 13 Engine oil requirements 13 Fuel requirements 14 Gasoline 14 Muddy or acidic water 14 Anti fouling paint 15 Motor disposal requirements 15 Emergency equipment 15 Components 16 Components diagram 16 Fuel tank 16 Fuel joint 17 F...

Page 6: ... Warming up engine 43 Manual start and electric start models 43 Checks after engine warm up 44 Shifting 44 Stop switches 44 Shifting 44 Stopping boat 45 Stopping engine 46 Procedure 46 Trimming outboard motor 46 Adjusting trim angle for manual tilt models 47 Adjusting trim angle power tilt models 47 Adjusting boat trim 48 Tilting up and down 49 Procedure for tilting up manual tilt models 49 Proced...

Page 7: ...Cleaning fuel tank 72 Inspecting and replacing anode s 73 Checking battery for electric start models 73 Connecting the battery 74 Disconnecting the battery 74 Trouble Recovery 75 Troubleshooting 75 Temporary action in emergency 78 Impact damage 78 Replacing fuse 78 Power tilt will not operate 79 Starter will not operate 79 Emergency starting engine manual starter model 80 Emergency starting engine...

Page 8: ...cket when the motor is trimmed or tilted Keep body parts out of this area at all times Be sure no one is in this area before operating the power tilt mecha nism The power tilt switches operate even when the main switch is off Keep people be away from the switches whenever working around the motor Never get under the lower unit while it is tilt ed even when the tilt support lever or knob is locked ...

Page 9: ...PFD whenever boating At a minimum children and non swimmers should always wear PFDs and everyone should wear PFDs when there are potentially hazardous boating conditions EMU33732 People in the water Always watch carefully for people in the wa ter such as swimmers skiers or divers whenever the engine is running When someone is in the water near the boat shift into neutral and stop the engine Stay a...

Page 10: ...and stopping the engine or reducing throttle can reduce the ability to steer If you are not sure that you can stop in time before hitting an obstacle apply throttle and turn in another direction EMU33791 Weather Stay informed about the weather Check weather forecasts before boating Avoid boating in hazardous weather EMU33881 Passenger training Make sure at least one other passenger is trained to o...

Page 11: ...to len EMU25192 Key number If a main key switch is equipped with the mo tor the key identification number is stamped on your key as shown in the illustration Re cord this number in the space provided for reference in case you need a new key EMU37292 EC Declaration of Conformity DoC This outboard motor conforms to certain por 1 Outboard motor serial number location 1 Outboard motor serial number lo...

Page 12: ...ation Name of Engine Manufacture Model name Product code of model Approved model code Code of conformed directives EMU25207 CE Marking Outboard motors affixed with this CE mark ing conform with the directives of 2006 42 EC 94 25 EC 2003 44 EC and 2004 108 EC 1 CE marking location 1 CE marking location ZMU05590 1 ZMU07465 1 ZMU06040 6AG 9 79 1E0 book 5 ページ ２０１４年１１月１０日 月曜日 午後４時８分 ...

Page 13: ...Read any manuals supplied with the boat Read all labels on the outboard motor and the boat If you need any additional information contact your Yamaha dealer EMU33834 Warning labels If these labels are damaged or missing contact your Yamaha dealer for replacements ZMU06638 1 2 3 6AG 9 79 1E0 book 6 ページ ２０１４年１１月１０日 月曜日 午後４時８分 ...

Page 14: ...s hair and clothing away from rotating parts while the engine is running Do not touch or remove electrical parts when starting or during operation 3 WARNING EWM01672 Read Owner s Manuals and labels Wear an approved personal flotation device PFD Attach engine shut off cord lanyard to your PFD arm or leg so the engine stops if you accidentally leave the helm which could prevent a runaway boat ZMU057...

Page 15: ...Warning Read Owner s Manual Hazard caused by continuous rotation Electrical hazard Remote control lever gear shift lever operat ing direction dual direction Engine start Engine cranking ZMU05696 ZMU05664 ZMU05665 ZMU05666 ZMU05667 ZMU05668 6AG 9 79 1E0 book 8 ページ ２０１４年１１月１０日 月曜日 午後４時８分 ...

Page 16: ... mm 42 4 in F15CMH 1078 mm 42 4 in F20BE 1078 mm 42 4 in F20BEP 1078 mm 42 4 in F20BMH 1078 mm 42 4 in F9 9HE 1078 mm 42 4 in F9 9HMH 1078 mm 42 4 in Overall height L 1205 mm 47 4 in Motor transom height S F15CE 438 mm 17 2 in F15CMH 438 mm 17 2 in F20BE 438 mm 17 2 in F20BEP 443 mm 17 4 in F20BMH 438 mm 17 2 in F9 9HE 438 mm 17 2 in F9 9HMH 438 mm 17 2 in Motor transom height L F15CE 565 mm 22 2 ...

Page 17: ...le F20BEP Remote steering F20BMH Tiller handle F9 9HE Remote steering F9 9HMH Tiller handle Starting system F15CE Electric starter F15CEH Electric starter F15CEP Electric starter F15CMH Manual starter F20BE Electric starter F20BEH Electric starter F20BEP Electric starter F20BMH Manual starter F9 9HE Electric starter F9 9HMH Manual starter Starting carburetion system Prime start Valve clearance IN ...

Page 18: ... qt 1 58 Imp qt Lubrication system Wet sump Recommended gear oil YAMALUBE outboard gear oil or Hy poid gear oil Recommended gear oil grade SAE 90 API GL 4 Gear oil quantity 0 250 L 0 264 US qt 0 220 Imp qt Tightening torque Spark plug 17 Nm 1 73 kgf m 12 5 ft lb Propeller nut 17 Nm 1 73 kgf m 12 5 ft lb Engine oil drain bolt 27 Nm 2 75 kgf m 19 9 ft lb Engine oil filter 18 Nm 1 84 kgf m 13 3 ft lb...

Page 19: ...ear protection device s This device prevents the engine from starting un less it is in neutral EMU25695 Battery requirements EMU25723 Battery specifications The engine cannot be started if battery volt age is too low EMU36291 Mounting battery Mount the battery holder securely in a dry well ventilated vibration free location in the boat WARNING Do not put flammable items or loose heavy or metal obj...

Page 20: ... with the maximum boat load Generally select a larger pitch propel ler for a smaller operating load and a smaller pitch propeller for a heavier load If you carry loads that vary widely select the propeller that lets the engine run in the proper range for your maximum load but remember that you may need to reduce your throttle setting to stay within the recommended engine speed range when carrying ...

Page 21: ... containing more than 10 ethanol can cause fuel system damage or cause en gine starting and running problems Yamaha does not recommend gasohol containing methanol because it can cause fuel system damage or engine performance problems It is recommended that you install a water separating marine fuel filter assembly 10 mi cron minimum between your boat s fuel tank and outboard motor when using ethan...

Page 22: ...gine corrosion EMU36342 Motor disposal requirements Never illegally discard dump the motor Yamaha recommends consulting the dealer about discarding the motor EMU36353 Emergency equipment Keep the following items onboard in case there is trouble with the outboard motor A tool kit with assorted screwdrivers pli ers wrenches including metric sizes and electrical tape Waterproof flashlight with extra ...

Page 23: ...3 Drain screw 4 Anti cavitation plate 5 Trim tab 6 Propeller 7 Cooling water inlet 8 Trim rod 9 Clamp bracket 10 Manual starter handle 11 Alert indicator 12 Gear shift lever 13 Engine stop button Engine shut off switch 14 Tiller handle 15 Throttle friction adjuster 16 Tilt lock lever 17 Clamp screw 18 Restraint cable attachment 19 Steering friction adjuster 20 Flushing device 21 Starter button 22 ...

Page 24: ...ed the tank can be filled with fuel To remove the cap turn it counterclockwise EMU25861 Air vent screw This screw is on the fuel tank cap To loosen the screw turn it counterclockwise EMU26182 Remote control box The remote control lever actuates both the shifter and the throttle The electrical switch es are mounted on the remote control box 1 Fuel joint 2 Fuel gauge 3 Fuel tank cap 4 Air vent screw...

Page 25: ...eutral throttle lever To open the throttle without shifting into ei ther forward or reverse put the remote con trol lever in the neutral position and lift the neutral throttle lever TIP The neutral throttle lever will operate only when the remote control lever is in neutral The remote control lever will operate only when the neutral throttle lever is in the closed position EMU25914 Tiller handle T...

Page 26: ...nce and fuel economy for the desired operation EMU25977 Throttle friction adjuster A friction device provides adjustable resis tance to movement of the throttle grip or the remote control lever and can be set accord ing to operator preference To increase resistance turn the adjuster clockwise To decrease resistance turn the adjuster counterclockwise WARNING Do not overtighten the friction adjuster...

Page 27: ...hut off cord to a secure place on your clothing or your arm or leg while operating Do not attach the cord to clothing that could tear loose Do not route the cord where it could become en tangled preventing it from functioning Avoid accidentally pulling the cord dur ing normal operation Loss of engine power means the loss of most steering control Also without engine power the boat could slow rapidl...

Page 28: ... switch in the on posi tion the electrical circuits are on and the key cannot be removed start With the main switch in the start po sition the starter motor turns to start the en gine When the key is released it returns automatically to the on position EMU26103 Power tilt switch The power tilt system adjusts the outboard motor angle in relation to the transom Push ing the switch up tilts the outbo...

Page 29: ...ter If there is too much resistance it could be difficult to steer which could result in an accident If the resistance does not increase even when the lever is turned to the port side A make sure that the nut is tightened to the specified torque TIP Steering movement is blocked when the adjuster lever is set to the A position Check the tiller handle for smooth move ment when the lever is turned to...

Page 30: ...e port side A in the figure If the boat tends to veer to the right star board side turn the trim tab end to the star board side B in the figure EMU26263 Trim rod tilt pin The position of the trim rod determines the minimum trim angle of the outboard motor in relation to the transom EMU30531 Tilt lock mechanism The tilt lock mechanism is used to prevent the outboard motor from lifting out of the wa...

Page 31: ...support bar when trailering the boat The outboard motor could shake loose from the tilt support and fall If the motor cannot be trailered in the normal running position use an addi tional support device to secure it in the tilt position EMU26362 Power tilt unit This unit tilts the outboard motor up and down and is controlled with the power tilt switch NOTICE ECM00631 Do not step on or exert pressu...

Page 32: ...y moving the cowling lock lever s downward EMU26464 Flushing device This device is used to clean the cooling wa ter passages of the motor using a garden hose and tap water TIP For details on usage see page 58 EMU26305 Alert indicator If the engine develops a condition which is cause for alert the indicator lights up For details on how to read the alert indicator see page 27 1 Flushing device ZMU05...

Page 33: ...re alert indicator does not indicate the engine oil level Use the oil dipstick to check the re maining oil quantity For further infor mation see page 34 EMU36034 Overheat alert indicator If the engine temperature rises too high this indicator will light up For further information on reading the indicator see page 27 NOTICE ECM00053 Do not continue to run the engine if the overheat alert indicator ...

Page 34: ...quipped on the tiller handle remote control box or main switch panel If the alert system has activated stop the en gine and check the cooling water inlets Check trim angle to be sure that the cool ing water inlet is submerged Check the cooling water inlet for clogging EMU3016C Low oil pressure alert If the oil pressure drops too low the alert de vice will activate The engine speed will automatical...

Page 35: ...ctivated stop the en gine as soon as it is safe to do so Check the oil level and add oil as needed If the oil level is correct and the alert device does not switch off consult your Yamaha dealer ZMU02360 6AG 9 79 1E0 book 28 ページ ２０１４年１１月１０日 月曜日 午後４時８分 ...

Page 36: ...acturer Improper mounting of the outboard mo tor could result in hazardous condi tions such as poor handling loss of control or fire hazards For permanent ly mounted models your dealer or oth er person experienced in proper rigging should mount the motor EMU32012 Mounting the outboard motor 1 Be sure to mount the outboard motor while the boat is on land If the boat is on the water move it to an ar...

Page 37: ...sure that the idle hole is high enough to prevent water from entering the engine even if the boat is stationary with the maximum load Incorrect engine height or obstructions to the smooth flow of water such as the design or condition of the boat or ac cessories such as transom ladders or depth finder transducers can create airborne water spray while the boat is cruising If the outboard motor is op...

Page 38: ... operation EWM00643 2 If the restraint cable attachment is equipped on your engine a restraint ca ble or chain should be used Attach one end to the restraint cable attachment and the other to a secure mounting point on the boat Otherwise the engine could be completely lost if it accidentally falls off the transom 3 Secure the clamp bracket to the transom using the bolts provided with the out board...

Page 39: ...to wear in evenly TIP Run the engine in the water under load in gear with a propeller installed as follows For 10 hours for breaking in engine avoid ex tended idling rough water and crowded ar eas 1 For the first hour of operation Run the engine at varying speeds up to 2000 r min or approximately half throttle 2 For the second hour of operation Increase engine speed as much as nec essary to put th...

Page 40: ...ther sourc es of ignition WARNING EWM00911 Leaking fuel can result in fire or explo sion Check for fuel leakage regularly If any fuel leakage is found the fuel system must be repaired by a qualified mechanic Improper repairs can make the outboard unsafe to operate EMU36452 Check for fuel leaks Check for fuel leaks or gasoline fumes in the boat Check for fuel leakage from the fuel sys tem Check the...

Page 41: ...ections of the throttle and shift cables EMU36484 Engine shut off cord lanyard Inspect the engine shut off cord and clip for damage such as cuts breaks and wear EMU40994 Engine oil 1 Place the outboard motor in a vertical position not tilted NOTICE If the out board motor is not level the oil level indicated on the oil dipstick may not be accurate ECM01862 2 Remove the oil dipstick and wipe it clea...

Page 42: ...sure that the rubber seal is seated all the way around the top cowling 3 Place the top cowling on the bottom cowling 4 Check to be sure the rubber seal is seat ed correctly between the top cowling and the bottom cowling 5 Move the cowling lock lever to lock the top cowling as shown NOTICE If the top cowling is not installed correctly water spray under the top cowling can damage the engine or the t...

Page 43: ...eck that the battery connections are clean secure and covered by insulating covers The electrical contacts of the battery and cables must be clean and properly connected or the battery will not start the engine Refer to the battery manufacturer s instruc tions for checks for your particular battery EMU2743A Filling fuel WARNING EWM01831 Gasoline and its vapors are highly flam mable and explosive A...

Page 44: ...ations EMU27453 Operating engine WARNING EWM00421 Before starting the engine make sure that the boat is tightly moored and that you can steer clear of any obstructions Be sure there are no swimmers in the water near you When the air vent screw is loosened gasoline vapor will be released Gaso line is highly flammable and its vapors are flammable and explosive Refrain from smoking and keep away from...

Page 45: ... fuel cannot be drawn from the fuel tank EMU27495 Starting engine WARNING EWM01601 Before starting the engine make sure that the boat is tightly moored and that you can steer clear of any obstructions Be sure there are no swimmers in the wa ter near you EMU39014 Manual start prime start models WARNING EWM01842 Failure to attach the engine shut off cord could result in a runaway boat if operator is...

Page 46: ...he clip on the other end of the cord into the engine shut off switch 3 Place the throttle grip in the start position 4 Pull the manual starter handle slowly un til you feel resistance Then give a strong pull straight out to crank and start the engine Repeat if necessary 5 After the engine starts slowly return the manual starter handle to its original posi tion before releasing it TIP When the engi...

Page 47: ... opening and closing of the throttle grip as this cause the spark plug to wet with fuel and prevent from the engine to start 4 Hold this throttle grip position by tighten ing the throttle friction adjuster 5 Pull the manual starter handle slowly un til you feel resistance Then give a strong pull straight out to crank and start the engine Repeat if necessary 6 After the engine starts slowly return ...

Page 48: ... engine power means the loss of most steering control Also without engine power the boat could slow rapidly This could cause people and objects in the boat to be thrown forward 1 Place the gear shift lever in neutral TIP The start in gear protection device prevents the engine from starting except when in neu tral 2 Attach the engine shut off cord to a se cure place on your clothing or your arm or ...

Page 49: ...M01842 Failure to attach the engine shut off cord could result in a runaway boat if operator is ejected Attach the engine shut off cord to a secure place on your clothing or your arm or leg while oper ating Do not attach the cord to clothing that could tear loose Do not route the cord where it could become entangled preventing it from functioning Avoid accidentally pulling the cord dur ing normal ...

Page 50: ...he cooling water pilot hole A continuous flow of water from the pilot hole indicates that the water pump is pumping water through the cooling water passages If the cooling water passages are frozen it may take a while for water to start flowing out of the pilot hole NOTICE ECM01811 If water is not flowing out of the pilot hole at all times while the engine is running overheating and serious damage...

Page 51: ...WARNING EWM00181 Before shifting make sure there are no swimmers or obstacles in the water near you NOTICE ECM01611 Warm up the engine before shifting into gear Until the engine is warm the idle speed may be higher than normal High idle speed can prevent you from shifting back to neutral If this occurs stop the engine shift to neutral then restart the engine and allow it to warm up To shift out of...

Page 52: ...on to slow down or stop the boat as it could cause you to lose control be ejected or im pact the steering wheel or other parts of the boat This could increase the risk of serious injury It could also damage the shift mechanism Do not shift into reverse while traveling at planing speeds Loss of control boat swamping or damage to the boat could occur The boat is not equipped with a separate braking ...

Page 53: ...ew on the fuel tank cap if equipped 4 Remove the key if the boat will be left un attended TIP The engine can also be stopped by pulling the cord and removing the clip from the en gine shut off switch then turning the main switch to off EMU27865 Trimming outboard motor WARNING EWM00741 Excessive trim for the operating condi tions either trim up or trim down can cause boat instability and can make s...

Page 54: ...desired hole To raise the bow trim out move the rod away from the transom To lower the bow trim in move the rod to ward the transom Make test runs with the trim set to different angles to find the position that works best for your boat and operating conditions WARNING EWM00401 Stop the engine before adjusting the trim angle Use care to avoid being pinched when removing or installing the rod Use ca...

Page 55: ...ower the bow trim in tilt the outboard motor down Make test runs with the trim set to different angles to find the position that works best for your boat and operating conditions TIP Stay within the trim operating angle when trimming the outboard motor using the power tilt system EMU27913 Adjusting boat trim When the boat is on plane a bow up attitude results in less drag greater stability and eff...

Page 56: ...re duce salt corrosion WARNING EWM00223 Make sure that no one is near the out board motor when tilting the outboard motor up or down Otherwise body parts could be crushed between the outboard motor and the clamp bracket WARNING EWM00251 Leaking fuel is a fire hazard If there is a fuel joint on the outboard motor discon nect the fuel line or close the fuel cock if the engine will be tilted for more...

Page 57: ...E Do not use the tilt support lever or knob when trailering the boat The outboard motor could shake loose from the tilt support and fall If the motor cannot be trailered in the normal running position use an additional support device to secure it in the tilt position For more detailed information see page 55 ECM01642 EMU44610 Procedure for tilting up power tilt models 1 Place the remote control le...

Page 58: ... or knob when trailering the boat The outboard motor could shake loose from the tilt support and fall If the motor cannot be trailered in the normal running position use an additional support device to secure it in the tilt position For more detailed information see page 55 ECM01642 EMU30193 Procedure for tilting down manual tilt models 1 Place the tilt lock lever in the lock posi tion 2 Slightly ...

Page 59: ...rk while the shallow water cruising system is being used Hitting an underwater obstacle could cause the outboard motor to lift out of the water resulting in loss of control Use extra care when operating in re verse Too much reverse thrust can cause the outboard motor to lift out of the water increasing the chance of ac cident and personal injury NOTICE ECM00261 Do not tilt the outboard motor up so...

Page 60: ...slightly tilt the outboard motor up until the tilt support bar auto matically returns to the free position 6 Slowly lower the outboard motor to the normal position EMU32862 Power tilt models The outboard motor can be tilted up partially to allow operation in shallow water NOTICE ECM00261 Do not tilt the outboard motor up so that the cooling water inlet on the lower unit is above the surface of the...

Page 61: ...in other conditions Cruising in salt water After operating in salt water flush the cooling water passages with fresh water to prevent them from becoming clogged Also rinse the outside of the outboard motor with fresh wa ter Cruising in muddy turbid or acidic water Yamaha strongly recommends that you use the optional chromium plated water pump kit see page 14 if you use the outboard motor in acidic...

Page 62: ... clog the fuel line causing engine start dif ficulty or malfunction When storing or transporting the outboard motor make sure to follow the procedure list ed below Disconnect the fuel line from the outboard motor Tighten the fuel tank cap and its air vent screw When the outboard motor is tilted pro longed time for mooring or trailering the boat disconnect the fuel line from the out board motor Tig...

Page 63: ...t be performed to prevent excessive damage It is advisable to have your outboard motor serviced by an authorized Yamaha dealer prior to storage However you the owner with a minimum of tools can perform the fol lowing procedures NOTICE ECM01081 To prevent problems which can be caused by oil entering the cylinder from the sump keep the outboard motor in the attitude shown when transporting and stori...

Page 64: ...immersed in wa ter NOTICE If the fresh water level is below the level of the anti cavitation plate or if the water supply is insuffi cient engine seizure may occur ECM00292 7 Cooling system flushing is essential to prevent the cooling system from clog ging up with salt sand or dirt In addi tion fogging lubricating of the engine is mandatory to prevent excessive engine damage due to rust Perform th...

Page 65: ...6 Flushing power unit Perform this procedure right after operation for the most thorough flushing NOTICE ECM01531 Do not perform this procedure while the engine is running The water pump may be damaged and severe damage from overheating can result 1 After shutting off the engine unscrew the garden hose connector from the fit ting on the bottom cowling 2 Screw the garden hose adapter onto a garden ...

Page 66: ...equire mechanical skills tools and supplies If you do not have the proper skills tools or supplies to perform a maintenance procedure have a Yamaha dealer or other qualified mechanic do the work The procedures involve disassembling the motor and exposing dangerous parts To reduce the risk of injury from moving hot or electrical parts Turn off the engine and keep the key s and engine shut off cord ...

Page 67: ... up and cool down Frequent quick acceleration and decelera tion Frequent shifting Frequently starting and stopping the en gine s Operation that fluctuates often between light and heavy cargo loads Outboard motors operating under any of these above conditions require more fre quent maintenance Yamaha recommends that you do this service twice as often as specified in the maintenance chart For ex amp...

Page 68: ...ter the engine should be flushed with clean water after each use The symbol indicates the check ups which you may carry out yourself The symbol indicates work to be carried out by your Yamaha dealer Item Actions Initial Every Page 20 hours 3 months 100 hours 1 year 300 hours 3 years 500 hours 5 years Anode s external Inspection or replacement as necessary 73 Anode s internal 1 Inspection or replac...

Page 69: ... water pump housing Replacement Power tilt unit Inspection 36 Propeller propeller nut cotter pin Inspection or replacement as necessary 69 Shift link shift cable Inspection adjust ment or replace ment as necessary Spark plug s Inspection or replacement as necessary 65 Spark plug caps spark plug wires Inspection or replacement as necessary Water from the cooling water pilot hole Inspection 43 Throt...

Page 70: ...t Inspection 16 Main switch stop switch Inspection or replacement as necessary Wire harness con nections wire cou pler connections Inspection or replacement as necessary Fuel tank Yamaha portable tank Inspection and cleaning as neces sary Item Actions Every Page 1000 hours Exhaust guide exhaust manifold Inspection or replacement as necessary Timing belt Replacement Item Actions Initial Every Page ...

Page 71: ...4 EMU28945 Greasing Yamaha grease A water resistant grease Yamaha grease D corrosion resistant grease for propeller shaft F9 9HMH F15CEH F15CMH F20BEH F20BMH ZMU05557 6AG 9 79 1E0 book 64 ページ ２０１４年１１月１０日 月曜日 午後４時８分 ...

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 re move and inspect the spark plug because heat and deposits will cause the spark plug to slowly break down and erode 1 Remove the spark plug caps from the spark plugs 2 Remove the spark plug If electrode ero sion becomes excessive or if carbon a...

Page 73: ... foreign matter is found in the filter clean or replace it For cleaning or replacement of the fuel filter consult your Yamaha dealer EMU29045 Inspecting idle speed WARNING EWM00452 Do not touch or remove electrical parts when starting or during operation Keep hands hair and clothes away from the flywheel and other rotating parts while the engine is running NOTICE ECM00491 This procedure must be pe...

Page 74: ...gly recommend ed that you use an oil changer to change the engine oil If an oil changer is not available drain the engine oil by removing the drain screw If you are not familiar with the proce dure for changing the engine oil consult your Yamaha dealer 1 Put the outboard motor in an upright po sition not tilted NOTICE If the out board motor is not level the oil level indicated on the oil dipstick ...

Page 75: ... level is above the upper level mark drain until the level meets the specified capacity ECM01851 9 Leave the outboard motor for 5 10 min utes 10 Remove the oil dipstick and wipe it clean 11 Insert the dipstick and remove it again Be sure to completely insert the dipstick into the dipstick guide otherwise the oil level measurement will be incorrect 12 Recheck the oil level using the dipstick to be ...

Page 76: ...pecting wiring and connectors Inspect that each connector is engaged securely Inspect that each ground lead is properly secured EMU32113 Checking propeller WARNING EWM01882 You could be seriously injured if the en gine accidentally starts when you are near the propeller Before inspecting re moving or installing the propeller place the shift control in neutral turn the main switch to off and remove...

Page 77: ...EMU30673 Installing propeller EMU46120 Spline models NOTICE ECM00502 Make sure to use a new cotter pin and bend the ends over securely Otherwise the propeller could come off during oper ation and be lost 1 Apply Yamalube Marine Grease or a corrosion resistant grease to the propel ler shaft 2 Install the spacer if equipped thrust washer washer if equipped and pro peller on the propeller shaft NOTIC...

Page 78: ...d motor falls on you Never get under the lower unit while it is tilted even when the tilt support lever or knob is locked Severe injury could occur if the outboard motor accidental ly falls 1 Tilt the outboard motor so that the gear oil drain screw is at the lowest point pos sible 2 Place a suitable container under the gear case 3 Remove the gear oil drain screw and gasket NOTICE If there is an ex...

Page 79: ...leaning fuel tank WARNING EWM00921 Gasoline is highly flammable and its va pors are flammable and explosive If you have any question about properly doing this procedure consult your Yamaha dealer Keep away from sparks cigarettes flames or other sources of ignition when cleaning the fuel tank Remove the fuel tank from the boat be fore cleaning it Work only outdoors in an area with good ventilation ...

Page 80: ...eads attached to external anodes on equipped models Consult a Yamaha dealer for inspection and replace ment of internal anodes attached to the pow er unit EMU29324 Checking battery for electric start models WARNING EWM01903 Battery electrolyte is poisonous and caustic and batteries generate explosive hydrogen gas When working near the battery Wear protective eye gear and rubber gloves Do not smoke...

Page 81: ...in switch on applica ble models is off before working on the battery 2 Connect the red battery cable to the POSITIVE terminal first Then con nect the black battery cable to the NEG ATIVE terminal 3 The electrical contacts of the battery and cables must be clean and properly con nected or the battery will not start the engine EMU29372 Disconnecting the battery 1 Turn off the battery cut off switch ...

Page 82: ...aha dealer Q Is shift lever in gear A Shift to neutral Engine will not start starter operates Q Is fuel tank empty A Fill tank with clean fresh fuel Q Is fuel contaminated or stale A Fill tank with clean fresh fuel Q Is fuel filter clogged A Clean or replace filter Q Is starting procedure incorrect A See page 38 Q Has fuel pump malfunctioned A Have serviced by a Yamaha dealer Q Are spark plug s fo...

Page 83: ...er Q Is air vent screw on fuel tank closed A Open air vent screw Q Is choke knob pulled out A Return to home position Q Is motor angle too high A Return to normal operating position Q Is carburetor clogged A Have serviced by a Yamaha dealer Q Is fuel joint connection incorrect A Connect correctly Q Is throttle valve adjustment incorrect A Have serviced by a Yamaha dealer Q Is battery cable disconn...

Page 84: ...g s Clean or replace with recommended type Q Are weeds or other foreign matter tangled on gear housing A Remove foreign matter and clean lower unit Q Is fuel system obstructed A Check for pinched or kinked fuel line or other obstructions in fuel system Q Is fuel filter clogged A Clean or replace filter Q Is fuel contaminated or stale A Fill tank with clean fresh fuel Q Is spark plug gap incorrect ...

Page 85: ...9442 Impact damage WARNING EWM00871 The outboard motor can be seriously damaged by a collision while operating or trailering Damage could make the out board motor unsafe to operate If the outboard motor hits an object in the wa ter follow the procedure below 1 Stop the engine immediately 2 Check the control system and all compo nents for damage Also check the boat for damage 3 Whether damage is fo...

Page 86: ...WM01023 Use this procedure only in an emergen cy to return to the nearest port for re pairs When the emergency starter rope is used to start the engine the start in gear protection device does not oper ate Make sure the remote control lever is in neutral Otherwise the boat could unexpectedly start to move which could result in an accident Attach the engine shut off cord to a se cure place on your ...

Page 87: ... engine is running Do not install the starter mechanism or top cowling after the engine is running Do not touch the ignition coil spark plug wire spark plug cap or other elec trical components when starting or op erating the motor You could get an electrical shock EMU31994 Emergency starting engine manual starter model 1 Remove the top cowling 2 Remove the dust cover 3 Disconnect the start in gear...

Page 88: ...after 4 or 5 tries open the throttle a small amount between 1 8 and 1 4 and try again Also if the engine is warm and fails to start open the throttle a same amount and try to start the engine again If the engine still fails to start see page 38 Slowly return the throttle grip to the fully closed position so that the engine does not stall EMU32004 Emergency starting engine electric start model 1 Re...

Page 89: ... the bolt s and fix the plate 7 Prepare the engine for starting For fur ther information see page 38 Be sure that the gear shift is in neutral and that the clip is attached to the engine shut off switch The main switch must be on if equipped ZMU05613 ZMU05624 ZMU05614 ZMU05615 ZMU05616 6AG 9 79 1E0 book 82 ページ ２０１４年１１月１０日 月曜日 午後４時８分 ...

Page 90: ...he throttle a small amount between 1 8 and 1 4 and try again Also if the engine is warm and fails to start open the throttle a same amount and try to start the engine again If the engine still fails to start see page 38 Slowly return the throttle grip to the fully closed position so that the engine does not stall EMU33502 Treatment of submerged motor If the outboard motor is submerged immedi ately...

Page 91: ...rmity DoC 4 Electric shock 1 Emergency equipment 15 Emergency starting engine electric start model 81 Emergency starting engine manual starter model 80 Emergency temporary action in 78 Engine checking 35 Engine oil 34 Engine oil changing 67 Engine oil filling 32 Engine oil requirements 13 Engine shut off cord lanyard 1 34 Engine shut off cord lanyard and clip 20 Engine stop button 20 F Filling fue...

Page 92: ...tilt system checking 36 Power tilt unit 24 Power tilt will not operate 79 Propeller 1 Propeller checking 69 Propeller installing 70 Propeller removing 70 Propeller selection 13 R Read manuals and labels 6 Rectifier Regulator optional 12 Remote control box 17 Remote control lever 18 Remote control requirements 12 Replacement parts 59 Rotating parts 1 S Sending fuel portable tank 37 Severe operating...

Page 93: ...op cowling removing 33 Transporting and storing outboard motor 55 Trimming outboard motor 46 Trim rod tilt pin 23 Trim tab 23 Troubleshooting 75 W Warming up engine 43 Warning labels 6 Weather 3 Wiring and connectors inspecting 69 6AG 9 79 1E0 book 86 ページ ２０１４年１１月１０日 月曜日 午後４時８分 ...

Page 94: ...Printed on recycled paper Printed in Japan December 2014 1 7 1 6AG 9 79 1E0 book 1 ページ ２０１４年１１月１０日 月曜日 午後４時８分 ...

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