EMU25051 Read this owner’s manual carefully before operating or working on your outboard motor. Keep this manual onboard in a waterproof bag when boating. This manual should stay with the outboard motor if it is sold.
Yamaha. If you have any question about the Some countries have laws or regulations re- operation or maintenance of your outboard stricting users from taking the product out of motor, please consult a Yamaha dealer.
Table of contents General information ......1 Fuel tank ......... 13 Fuel joint.......... 14 Identification numbers record..1 Fuel gauge ........14 Outboard motor serial number ..1 Fuel tank cap........14 Key number........1 Air vent screw........14 EC label........... 1 Remote control ........
Table of contents Engine ..........29 motor..........55 Checking the engine oil level ..29 Periodic maintenance ....55 Filling fuel ........29 Replacement parts ......55 Operating engine......30 Severe operating conditions.... 55 Feeding fuel (portable tank) .... 30 Maintenance chart 1......
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. EMU33830 Warning labels If these labels are damaged or missing, contact your Yamaha dealer for replacements. ZMU05739...
General information ZMU05706 EMU33911 Contents of labels EWM01670 The above warning labels mean as follows. WARNING Read Owner’s Manuals and labels. EWM01690 Wear an approved personal flotation WARNING device (PFD). Emergency starting does not have start- Attach engine shut-off cord (lanyard) to in-gear protection.
General information ZMU05696 ZMU05666 Read Operator’s Manual Remote control lever/gear shift lever operat- ing direction, dual direction ZMU05664 ZMU05667 Hazard caused by continuous rotation Engine start/ Engine cranking ZMU05665 ZMU05668 Electrical hazard...
Safety information EMU33621 is locked. Severe injury could occur if the Safety information outboard motor accidentally falls. Observe these precautions at all times. EMU33670 Engine shut-off cord EMU33630 Rotating parts Attach the engine shut-off cord so that the Hands, feet, hair, jewelry, clothing, PFD engine stops if the operator falls overboard straps, etc.
Have an approved personal flotation device tions. Overloading or incorrect weight (PFD) on board for every occupant. Yamaha distribution can compromise the boats han- recommends that you must wear a PFD dling and lead to an accident, capsizing or whenever boating.
Safety information Avoid sharp turns or other maneuvers that make it hard for others to avoid you or un- derstand where you are going. Avoid areas with submerged objects or shallow water. Ride within your limits and avoid aggres- sive maneuvers to reduce the risk of loss of control, ejection, and collision.
Basic requirements EMU25540 EMU25580 Fueling instructions Gasoline EWM00010 Recommended gasoline: WARNING Regular unleaded gasoline with a min- GASOLINE AND ITS VAPORS ARE HIGH- imum octane rating of 90 (Research LY FLAMMABLE AND EXPLOSIVE! Octane Number). Do not smoke when refueling, and keep away from sparks, flames, or other If knocking or pinging occurs, use a different sources of ignition.
EMU33560 Boat horsepower rating continue using the outboard. Contact Before installing the outboard motor(s), con- your Yamaha dealer. firm that the total horsepower of your mo- EMU25693 tor(s) does not exceed the boats maximum Battery requirement horsepower rating.
2. Propeller pitch in inches 3. Type of propeller (propeller mark) EMU25770 Start-in-gear protection Yamaha outboard motors or Yamaha-ap- proved remote control units are equipped with start-in-gear protection device(s). This feature permits the engine to be started only when it is in neutral. Always select neutral...
EMU2579B Main components NOTE: * May not be exactly as shown; also may not be included as standard equipment on all mod- els. F13.5B, F15C, F20B ZMU05576 1. Top cowling 15. Throttle friction adjuster* 2. Top cowling lock lever(s) 16. Tilt lock lever* 3.
Basic components fuel tank, its function is as follows. EMU26180 Remote control EWM00020 The remote control lever actuates both the WARNING shifter and the throttle. The electrical switch- The fuel tank supplied with this engine is es are mounted on the remote control box. its dedicated fuel reservoir and must not be used as a fuel storage container.
Basic components EMU26190 Remote control lever Moving the lever forward from the neutral po- sition engages forward gear. Pulling the le- ver back from neutral engages reverse. The engine will continue to run at idle until the le- ver is moved about 35° (a detent can be felt). Moving the lever farther opens the throttle, and the engine will begin to accelerate.
Basic components ZMU01997 EMU25961 EMU25922 Throttle indicator Gear shift lever The fuel consumption curve on the throttle Pulling the gear shift lever towards you puts indicator shows the relative amount of fuel the engine in forward gear so that the boat consumed for each throttle position.
Basic components there is too much resistance, it could be arm or leg while operating. difficult to move the remote control lever Do not attach the cord to clothing that or throttle grip, which could result in an could tear loose. Do not route the cord accident.
Basic components EMU26001 Engine stop button To open the ignition circuit and stop the en- gine, push this button. ZMU05521 EMU26090 Main switch The main switch controls the ignition system; ZMU02083 its operation is described below. “ ” (off) EMU26070 Manual starter handle With the main switch in the “...
Basic components ing the switch “ ” (up) tilts the outboard mo- To decrease resistance, turn the lever to the tor up. Pressing the switch “ ” (down) tilts starboard side “B”. the outboard motor down. When the switch is EWM00040 WARNING released, the outboard motor will stop in its...
Basic components Check the tiller handle for smooth move- force. ment when the lever is turned to the star- EWM00840 WARNING board side “B”. An improperly adjusted trim tab could Do not apply lubricants such as grease to cause difficult steering. Always test run the friction areas of the steering friction ad- after the trim tab has been installed or re- juster.
Basic components the release position. EMU26321 Tilt support knob To keep the outboard motor in the tilted up position, push the tilt support knob under the swivel bracket. ZMU05525 EMU30530 Tilt lock mechanism The tilt lock mechanism is used to prevent the outboard motor from lifting out of the wa- ter when in reverse gear.
Basic components ZMU05528 ECM01660 1. Power tilt unit CAUTION: 2. Power tilt motor Do not use the tilt support bar when ECM00660 trailering the boat. The outboard motor CAUTION: could shake loose from the tilt support Do not use the tilt support lever or knob and fall.
Do not continue to operate the engine if a NOTE: warning device has activated. Consult For details on usage, see page 54. your Yamaha dealer if the problem can- not be located and corrected. EMU26817 Overheat warning This engine has an overheat-warning de- vice.
If the oil level is correct and the warning device does EMU30168 Low oil pressure warning not switch off, consult your Yamaha dealer. If the oil pressure drops too low, the warning ECM00101 CAUTION: device will activate.
Operation EMU26902 Hold the handgrips and steering brack- Installation ets as shown in the illustration and lift up The information presented in this section is the outboard motor using two people. intended as reference only. It is not possible to provide complete instructions for every possible boat and motor combination.
The optimum mounting height of the out- board motor is affected by the boat and motor combination and the desired use. Test runs at different heights can help de- termine the optimum mounting height. Consult your Yamaha dealer or boat man-...
For ten hours for Check fuel line connections to be sure they breaking in engine avoid extended idling, are tight (if equipped Yamaha fuel tank or rough water and crowded areas. boat tank). Be sure the fuel tank is positioned on a se-...
Operation “ ” (off) position stops the engine. Confirm that removing the clip from the en- gine shut-off switch stops the engine. Confirm that the engine cannot be started with the clip removed from the engine shut-off switch. EMU27140 Engine Check the engine and engine mounting.
Operation ZMU02022 ZMU04047 If there is a fuel joint on the motor, firmly EMU27450 Operating engine connect the fuel line to the joint. Then EMU27463 firmly connect the other end of the fuel Feeding fuel (portable tank) line to the joint on the fuel tank. EWM00420 WARNING Before starting the engine, make sure...
Operation from the fuel tank. the engine from starting except when in neu- tral. Squeeze the primer pump, with the ar- row pointing up, until you feel it become Attach the engine shut-off cord to a se- firm. cure place on your clothing, or your arm or leg.
Operation ZMU05600 ZMU05533 Pull the manual starter handle slowly un- NOTE: til you feel resistance. Then give a The start-in-gear protection device prevents strong pull straight out to crank and start the engine from starting except when in neu- the engine. Repeat if necessary. tral.
Operation turn to its original position. ECM00160 CAUTION: Never push the starter button while the engine is running. Do not keep the starter motor turning for more than 5 seconds. If the starter motor is turned continuously for more than 5 seconds, the battery will be ZMU02026 quickly discharged, thus making it im- possible to start the engine.
Operation the engine from starting except when in neu- tral. Attach the engine shut-off cord to a se- cure place on your clothing, or your arm or leg. Then install the clip on the other end of the cord into the engine shut-off switch.
Check the oil ECM01610 level and add oil if necessary. Consult CAUTION: your Yamaha dealer if the cause for the Warm up the engine before shifting into low oil pressure warning indicator can- gear. Until the engine is warm, the idle not be found.
Operation Move the remote control lever / gear erates only when the throttle grip is in the ful- shift lever firmly and crisply forward (for ly closed position. forward gear) or backward (for reverse To shift from in gear (forward/reverse) to gear) [about 35°...
Operation ZMU02083 ZMU05533 EMU31742 Stopping boat EWM01510 WARNING Do not use the reverse function 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.
Operation ZMU02041 Remove the key if the boat will be left 1. Trim operating angle unattended. EMU27872 NOTE: Adjusting trim angle for manual tilt The engine can also be stopped by pulling models the cord and removing the clip from the en- There are 4 or 5 holes provided in the clamp gine shut-off switch, then turning the main bracket to adjust the outboard motor trim an-...
Operation your boat and operating conditions. EWM00400 WARNING Stop the engine before adjusting the trim angle. Use care to avoid being pinched when removing or installing the rod. Use caution when trying a trim position for the first time. Increase speed gradu- ally and watch for any signs of instabil- ity or control problems.
Operation also be adjusted to help offset this effect. danger of “bow steering” and making opera- When the bow of the boat is down, it is easier tion difficult and dangerous. to accelerate from a standing start onto plane. NOTE: Depending on the type of boat, the outboard Bow Up motor trim angle may have little effect on the...
Operation few minutes. Otherwise fuel may leak. ECM00241 CAUTION: Before tilting the outboard motor, stop the engine by following the procedure on page 37. Never tilt the outboard mo- tor while the engine is running. Severe damage from overheating can result. Do not tilt up the engine by pushing the ZMU05548 tiller handle (if equipped) because this...
Operation EMU32722 Procedure for tilting up (power tilt models) Place the remote control lever / gear shift lever in neutral. ZMU04884 EWM00261 WARNING After tilting the outboard motor, be sure to support it with the tilt support knob or tilt support lever. Otherwise the outboard Press the power tilt switch “...
Operation EMU30192 Procedure for tilting down (manual tilt models) Place the tilt lock lever in the lock posi- tion. ZMU04886 Push the power tilt switch “ ” (down) to lower the outboard motor to the desired position. ZMU05541 Slightly tilt the engine up until the tilt sup- port bar is automatically released.
Operation EMU28071 Cruising in shallow water (manual tilt models) EWM00710 WARNING Place the gear shift in neutral before us- ing the shallow water cruising system. Run the boat at the lowest possible speed when using the shallow water cruising system. The tilt lock mecha- nism does not work while the shallow EMU28124 water cruising system is being used.
Operation to allow operation in shallow water. EWM00660 WARNING Place the gear shift in neutral before setting up for shallow water cruising. Return the outboard motor to its normal position as soon as the boat is back in deeper water. ECM00260 ZMU05548 CAUTION:...
Cruising in muddy or turbid water Yamaha strongly recommends that you use the optional chromium-plated water pump kit (available for V4 and large engines) if you use the outboard motor in water with a lot of sediment in it, such as muddy or other turbid (cloudy) water.
Maintenance EMU34520 Overall height S: Specifications F13.5BEP 1078 mm (42.4 in) NOTE: F13.5BMH 1078 mm (42.4 in) F15CE 1078 mm (42.4 in) “(AL)” stated in the specification data below F15CEH 1078 mm (42.4 in) represents the numerical value for the alumi- F15CMH 1078 mm (42.4 in) num propeller installed.
Maintenance F20BEH 53.7 kg (118 lb) Idling speed (in neutral): 1050 ±50 r/min F20BEP 58.7 kg (129 lb) F20BMH 51.7 kg (114 lb) Engine: Weight (AL) L: Type: F13.5BEH 55.7 kg (123 lb) 4-stroke L F13.5BEP 60.7 kg (134 lb) Displacement: F13.5BMH 53.7 kg (118 lb) 362.0 cm...
Maintenance Valve clearance (cold engine) IN: Propeller mark: 0.15–0.25 mm (0.0059–0.0098 in) Valve clearance (cold engine) EX: Fuel and oil: 0.25–0.35 mm (0.0098–0.0138 in) Recommended fuel: Min. cold cranking amps (CCA/EN): Regular unleaded gasoline F13.5BEH 347.0 A Min. research octane: F13.5BEP 347.0 A F15CE 347.0 A Fuel tank capacity:...
Place a towel or something similar under the outboard motor to protect it from damage. EMU28241 Storing outboard motor When storing your Yamaha outboard motor for prolonged periods of time (2 months or longer), several important procedures must be performed to prevent excessive damage.
Maintenance the attitude shown when transporting and storing it. If storing or transporting the outboard motor on its side (not up- right), put it on a cushion after draining the engine oil. Do not place the outboard motor on its side before the cooling water has drained from it completely, otherwise water may enter the cylinder through...
Charge batteries in a well-ventilated ar- ence of water that indicates a leaky seal. Seal replacement should be performed Keep batteries away from fire, sparks, by an authorized Yamaha dealer prior to or open flames (for example: welding use. equipment, lighted cigarettes, and so Grease all grease fittings.
Maintenance Procedure Disconnect and remove the battery from the boat. Always disconnect the black negative cable first to prevent the risk of shorting. Clean the battery casing and terminals. Fill each cell to the upper level with dis- tilled water. Store the battery on a level surface in a cool, dry, well-ventilated place out of di- rect sunlight.
When flushing the engine with the boat in chine servicing, this work should be done the water, tilting up the outboard motor un- by your Yamaha dealer or other qualified til it is completely out of the water will mechanic.
Maintenance 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- ample, if a particular service should be done at 50 hours, do it instead at 25 hours. This will help prevent more rapid deterioration of engine components.
The “ ” symbol indicates the check-ups which you may carry out yourself. The “ ” symbol indicates work to be carried out by your Yamaha dealer. Initial Every 20 hours Item...
Inspection and adjust- Valve clearance ment Water inlet Inspection Main switch/stop Inspection or replace- switch/choke switch ment as necessary Wire harness connec- Inspection or replace- tions/Wire coupler con- ment as necessary nections Inspection and clean- (Yamaha) Fuel tank ing as necessary...
Maintenance EMU34450 Maintenance chart 2 Every Item Actions 1000 hours Guide exhaust/exhaust Inspection or replace- manifold ment as necessary Timing belt Replacement EMU28910 NOTE: When using lead or high-sulfur gasoline, inspecting valve clearance may be required more frequently than every 500 hours.
Maintenance F13.5BEP, F15CEP, F15CE, F20BE, F20BEP ZMU05595 EMU28953 fire. Cleaning and adjusting spark plug EWM01550 EWM00560 WARNING WARNING The engine will still be very hot when it When removing or installing a spark plug, has just been turned off. Take extremely be careful not to damage the insulator.
Improper repairs can make the outboard unsafe to operate. Check the fuel lines for leaks, crack, or mal- function. If a problem is found, your Yamaha dealer or other qualified mechanic should re- Spark plug gap: pair it immediately.
Gasoline is highly flammable, and its va- necessary. If any water is found in the pors are flammable and explosive. fuel, the Yamaha portable fuel tank or If you have any question about properly other fuel tanks should be checked and doing this procedure, consult your cleaned.
If you have difficulty ver- 1. Filter cup ifying the idle speed, or the idle speed re- 2. Filter element quires adjustment, consult a Yamaha dealer 3. O-ring 4. Filter housing or other qualified mechanic. Verify whether the idle speed is set to Reinstall the filter element in the cup.
Maintenance could cause leakage or damage. ECM01240 CAUTION: Change the engine oil after the first 10 hours of operation, and every 100 hours or at 6-month intervals thereafter. Other- wise the engine will wear quickly. NOTE: ZMU05561 Change the engine oil when the oil is still warm.
EMU29140 NOTE: Engine oil leakage Consult your Yamaha dealer if any operation Check for oil leaks on the around the engine. is abnormal. NOTE: If any leaks are found, consult your Yamaha EMU32110 Checking propeller dealer. EWM01610 EMU34780 WARNING Checking power tilt system...
EMU30661 Removing propeller Apply Yamaha marine grease or a cor- EMU29196 rosion resistant grease to the propeller Spline models shaft. Straighten the cotter pin and pull it out Install the spacer (if equipped), thrust using a pair of pliers.
Be sure the outboard motor is securely into the gear case which can cause gear fastened to the transom or a stable damage. Consult a Yamaha dealer for re- stand. You could be severely injured if pair of the lower unit seals.
EMU29312 If you have any question about properly Inspecting and replacing anode(s) doing this procedure, consult your Yamaha outboard motors are protected from Yamaha dealer. corrosion by sacrificial anodes. Inspect the Keep away from sparks, cigarettes, external anodes periodically. Remove scales flames, or other sources of ignition from the surfaces of the anodes.
Antidote (EXTERNAL): anodes on equipped models. Consult a SKIN - Flush with water. Yamaha dealer for inspection and replace- EYES - Flush with water for 15 minutes ment of internal anodes attached to the pow- and get immediate medical attention.
Maintenance EMU29400 Coating the boat bottom A clean hull improves boat performance. The boat bottom should be kept as clean of ma- rine growth as possible. If necessary, the boat bottom can be coated with an anti-foul- ing paint approved for your area to inhibit marine growth.
Therefore some items may not apply to your model. Q. Has fuel pump malfunctioned? If your outboard motor requires repair, bring A. Have serviced by a Yamaha dealer. it to your Yamaha dealer. If the engine trouble-warning indicator is Q. Are spark plug(s) fouled or of incorrect flashing, consult your Yamaha dealer.
Q. Is fuel contaminated or stale? A. Fill tank with clean, fresh fuel. Q. Is carburetor clogged? A. Have serviced by a Yamaha dealer. Q. Is fuel filter clogged? A. Clean or replace filter. Q. Is fuel joint connection incorrect? A.
Q. Is fuel system obstructed? Q. Is water pump or thermostat faulty? A. Check for pinched or kinked fuel line or A. Have serviced by a Yamaha dealer. other obstructions in fuel system. Q. Is there excess water in fuel filter cup? Q.
EWM00630 Q. Is steering pivot loose or damaged? WARNING A. Tighten or have serviced by a Yamaha Be sure to use the specified fuse. An in- dealer. correct fuse or a piece of wire could allow EMU29433 excessive current flow.
Trouble Recovery ZMU05565 1. Manual valve screw 1. Fuse puller 2. Cap Put the engine in the desired position, 3. Fuse (20 A) then tighten the manual valve screw by 4. Spare fuse (20 A) turning it clockwise. EMU29533 Starter will not operate If the starter mechanism does not operate (the engine cannot be cranked with the start- er), the engine can be started with an emer-...
Trouble Recovery ing normal operation. Loss of engine power means the loss of most steering control. Also, without engine power, the boat could slow rapidly. This could cause people and objects in the boat to be thrown forward. Make sure no one is standing behind you when pulling the starter rope.
Trouble Recovery NOTE: If the engine does not start on the first try, repeat the procedure. If the engine fails to start 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.
Trouble Recovery and pull it down. ZMU05615 ZMU05613 Secure the electrical system plate by tightening the bolt(s), and fix the plate. ZMU05624 ZMU05616 Remove the starter/flywheel cover after removing the bolt(s). Prepare the engine for starting. For fur- ther information, see page 31. Be sure that the gear shift is in neutral and that the clip is attached to the engine shut-off switch.
EMU29760 ON START Treatment of submerged motor If the outboard motor is submerged, immedi- ately take it to a Yamaha dealer. Otherwise some corrosion may begin almost immedi- ately. If you cannot immediately take the outboard ZMU01906 motor to a Yamaha dealer, follow the proce-...
Trouble Recovery rope. Take the outboard motor to a Yamaha dealer as soon as possible. ECM00400 CAUTION: Do not attempt to run the outboard motor until it has been completely inspected.
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