EMU25100 To the owner Thank you for choosing a Yamaha outboard motor. This Owner’s Manual contains infor- mation needed for proper operation, mainte- nance and care. A thorough understanding of these simple instructions will help you obtain maximum enjoyment from your new Yamaha.
Table of contents General information ... 1 Identification numbers record ... 1 Outboard motor serial number ... 1 Key number ... 1 Emission control information ... 1 North American models... 1 Star labels ... 2 Safety information ... 3 Important labels... 4 Warning labels...
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Operating engine... 30 Feeding fuel... 30 Starting engine ... 30 Warming up engine ... 32 Manual start and electric start models ... 32 Shifting ... 33 Forward (tiller handle and remote control models) ... 33 Reverse (automatic reverse lock and power trim and tilt models) ...
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Table of contents YAMAHA MOTOR CORPORATION, U.S.A. FOUR-STROKE OUTBOARD MOTOR THREE-YEAR LIMITED WARRANTY ... 70 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE U.S.A. OR CANADA ... 72...
Record your outboard motor serial number in the spaces provided to assist you in ordering spare parts from your Yamaha dealer or for reference in case your outboard motor is sto- len. 1. Outboard motor serial number location...
General information EMU25261 Manufactured date label This label is attached to the clamp bracket or the swivel bracket. 1. Manufactured date label location Manufactured: EMU25272 Star labels Your outboard motor is labeled with a Califor- nia Air Resources Board (CARB) star label. See below for a description of your particular label.
EMU25300 Three Stars—Ultra Low Emission The three-star label identifies engines that meet the Air Resources Board’s 2008 ex- haust emission standards. Engines meeting these standards have 65% lower emissions than One Star-Low-Emission engines. EMU25361 Safety information Before mounting or operating the outboard motor, read this entire manual.
General information Stay informed about the weather. Check weather forecasts before boating. Avoid boating in hazardous weather. Tell someone where you are going: leave a Float Plan with a responsible person. Be sure to cancel the Float Plan when you re- turn.
driving your boat. These rules are used inter- nationally, and are also enforced by the Unit- ed States Coast Guard and local agencies. You should be aware of these rules, and fol- low them whenever you encounter another vessel on the water. Several sets of rules prevail according to geo- graphic location, but are all basically the same as the International Rules of the Road.
General information Meeting If you are meeting another power vessel head on, and are close enough to run the risk of col- lision, neither of you has the right-of-way! Both of you should alter course to avoid an ac- cident. You should keep the other vessel on your port (left) side.
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Fishing vessel right-of-way All vessels which are fishing with nets, lines or trawls are considered to be “fishing vessels” under the International Rules. Vessels with trolling lines are not considered fishing ves- sels. Fishing vessels have the right-of-way re- gardless of position. Fishing vessels cannot, however, impede the passage of other ves- sels in narrow channels.
General information EMU25540 Fueling instructions EWM00010 WARNING GASOLINE AND ITS VAPORS ARE HIGH- LY FLAMMABLE AND EXPLOSIVE! ZMU01708 Do not smoke when refueling, and keep away from sparks, flames, or other sources of ignition. Stop engine before refueling. Refuel in a well-ventilated area. Refuel portable fuel tanks off the boat.
Gasohol containing ethanol can be used if ethanol content does not exceed 10% and the fuel meets minimum octane ratings. Yamaha does not recommended gasohol containing methanol because it can cause fuel system damage or engine performance problems.
Yamaha outboard motors are fitted with pro- pellers chosen to perform well over a range of applications, but there may be uses where a propeller with a different pitch would be more appropriate.
EMU25795 NOTE: * May not be exactly as shown; also may not be included as standard equipment on all models. 1. Top cowling 2. Anti-cavitation plate 3. Trim tab (anode) 4. Propeller 5. Cooling water inlet 6. Clamp bracket 7. Top cowling lock lever(s) 8.
Basic components 2. Remote control lever 3. Neutral interlock trigger 4. Neutral throttle lever 5. Main switch / choke switch 6. Engine stop lanyard switch 7. Throttle friction adjuster 1. Remote control lever 2. Power trim and tilt switch 3. Free accelerator 4.
NOTE: 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. 1. Fully open 2. Fully closed EMU26230 Free accelerator To open the throttle without shifting into either forward or reverse, push the free accelerator...
Basic components When constant speed is desired, tighten the adjuster to maintain the desired throttle set- ting. EMU25990 Engine stop lanyard switch The lock plate must be attached to the engine stop switch for the engine to run. The lanyard should be attached to a secure place on the operator’s clothing, or arm or leg.
With the main switch in the “ sition, the starter motor turns to start the en- gine. When the key is released, it returns automatically to the “ ” (on) position. START EMU26141 Power trim and tilt switch on remote control or tiller handle The power trim and tilt system adjusts the out- board motor angle in relation to the transom.
Basic components NOTE: For instructions on using the power trim and tilt switch, see page 36. EMU26161 Power trim and tilt switches (twin binnacle type) The power trim and tilt system adjusts the out- board motor angle in relation to the transom. Pushing the switch “...
EMU26340 Tilt support lever for power trim and tilt or hydro tilt model To keep the outboard motor in the tilted up po- sition, lock the tilt support lever to the clamp bracket. EMU26382 Top cowling lock lever (pull up type) To remove the engine top cowling, pull up the lock lever(s) and lift off the cowling.
Basic components EMU26491 Digital tachometer The tachometer shows the engine speed and has the following functions. NOTE: All segments of the display will light momen- tarily after the main switch is turned on and will return to normal thereafter. 1. Tachometer 2.
EMU26600 Speedometer (digital type) This gauge shows the boat speed. 1. Speedometer 2. Fuel gauge 3. Trip meter/clock/voltmeter 4. Warning indicator(s) NOTE: After the main switch is first turned on, all seg- ments of the display come on as a test. After a few seconds, the gauge will change to nor- mal operation.
Basic components EMU26650 Hour meter (digital type) This meter shows the number of hours the en- gine 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.
When all segments are showing, the fuel tank is full. ECM00860 CAUTION: The Yamaha fuel tank sensor differs from conventional sensors. Incorrectly setting the selector switch on the gauge will give false readings. Consult your Yamaha deal- er on how to correctly set the selector switch.
Basic components EMU26740 Fuel management meter The fuel management meter shows the state of the fuel consumption while the engine is running. 1. Fuel flow meter 2. Fuel consumption meter / Fuel economy meter / Twin engine speed synchronizer 3. Water separator warning indicator (operates only if the sensor has been installed) NOTE: After the main switch is first turned on, all seg-...
(winter or summer fuel and amount of addi- tives). The Yamaha digital speedometer and fuel management meter calculates speed, miles traveled, and fuel economy by water movement at the stern of the boat. This dis-...
Warning system ECM00090 CAUTION: Do not continue to operate the engine if a warning device has activated. Consult your Yamaha dealer if the problem cannot be located and corrected. ZMU01754 EMU26822 Overheat warning (twin engines) This engine has an overheat warning device.
Check the oil level and add oil as needed. If the oil level is correct and the warning device does not switch off, consult your Yamaha dealer. ZMU01828 START START...
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Basic components ECM00100 CAUTION: Do not continue to run the engine if the low oil pressure warning indicator is on. Serious engine damage could occur.
EMU26901 Installation ECM00110 CAUTION: Incorrect engine height or obstructions to smooth water flow (such as the design or condition of the boat, or accessories such as transom ladders or depth finder trans- ducers) can create airborne water spray while the boat is cruising. Severe engine damage may result if the motor is operat- ed continuously in the presence of air- borne water spray.
Test runs at different heights can help determine the optimum mounting height. Consult your Yamaha dealer or boat manufacturer for further information on determining the prop- er mounting height. For instructions on setting the trim angle of the outboard motor, see page 34.
Make sure there are no fuel leaks or gaso- line fumes. Check fuel line connections to be sure they are tight (if equipped Yamaha fuel tank or boat tank). Be sure the fuel tank is positioned on a se- cure, flat surface, and that the fuel line is not...
Performance drops and engine wear increases dramatical- While many additives available may reduce deposits, Yamaha recommends the use of Ring Free Fuel Additive, available from your Yamaha dealer. Ring Free Fuel Additive has repeatedly proven its ability to clean com-...
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NOTE: The start-in-gear protection device prevents the engine from starting except when in neu- tral. Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg. Then install the lock plate on the other end of the lanyard into the en- gine stop switch.
Otherwise serious en- gine damage could occur. Check the oil level and add oil if necessary. Consult your Yamaha dealer if the cause for the low oil pressure warning indicator can- not be found. A continuous flow of water from the pilot...
Consult your Yamaha dealer if the problem cannot be located and corrected. If the cooling passage is frozen, it may take awhile for water to start flowing out of the pilot hole. EMU27740 Shifting EWM00180 WARNING Before shifting, make sure there are no swimmers or obstacles in the water near you.
Operation Remote control models Pull up the neutral interlock trigger (if equipped) and move the remote control lever quickly and firmly from neutral to reverse. EMU27820 Stopping engine Before stopping the engine, first let it cool off for a few minutes at idle or low speed. Stop- ping the engine immediately after operating at high speed is not recommended.
engine, and propeller. Correct trim is also af- fected by variables such as the load in the boat, sea conditions, and running speed. EWM00740 WARNING Excessive trim for the operating condi- tions (either trim up or trim down) can cause boat instability and can make steer- ing the boat more difficult.
Operation EMU27911 Adjusting boat trim When the boat is on plane, a bow-up attitude results in less drag, greater stability and effi- ciency. This is generally when the keel line of the boat is up about 3 to 5 degrees. With the bow up, the boat may have a greater tenden- cy to steer to one side or the other.
connect the fuel line if the outboard mo- tor is equipped with a fuel joint. Otherwise fuel may leak. ECM00990 CAUTION: Before tilting the outboard motor, follow the procedure under “Stopping engine” in this chapter. Never tilt the outboard motor while the engine is running. Se- vere damage from overheating can re- sult.
Operation Models equipped with trim rods: Once the outboard motor is supported with the tilt support lever, press the power trim and tilt switch “ ” (down) to retract the trim rods. ECM00250 CAUTION: Be sure to retract the trim rods completely during mooring.
NOTE: For cooling system flushing instructions, see page 41. Cruising in turbid water Yamaha strongly recommends that you use the optional chromium-plated water pump kit if you use the outboard motor in turbid (mud- dy) water conditions. ZMU04588 Operation...
It is advisable to have your outboard motor ser- viced by an authorized Yamaha dealer prior to storage. However, you, the owner, with a min- imum of tools, can perform the following pro- cedures.
Stabilizer” (Part No. LUB-FUELC-12- 00) to each gallon of fuel. NOTE: The use of “Yamaha Fuel Conditioner and Stabilizer” eliminates the need to drain the fuel system. Consult your Yamaha dealer or other qualified mechanic if the fuel system is to be drained instead.
Spray the outboard motor exterior with “Yamaha Silicone Protectant” (Part No. LUB-SILCNE-13-00). Maintenance Wax the cowling with a non-abrasive wax such as “Yamaha Silicone Wax” (Part No. ACC-11000-15-02). EMU28430 Battery care EWM00330 WARNING Battery electrolytic fluid is dangerous; it contains sulfuric acid and therefore is poi- sonous and highly caustic.
Maintenance Batteries vary among manufacturers. There- fore the following procedures may not always apply. Consult your battery manufacturer’s in- structions. Procedure Disconnect and remove the battery from the boat. Always disconnect the black negative cable first to prevent the risk of shorting.
If you or the owner is not famil- iar with machine servicing, this work should be done by your Yamaha dealer or other qualified mechanic. Maintenance, replacement, or repair of the emission control devices and systems may be performed by any marine engine repair establishment or individual.
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 Inspection / Anode(s) (external)
Item Water pump Inspection Engine oil Inspection / change Oil filter (cartridge) Change Cleaning / adjustment / Spark plug(s) replacement Inspection / Timing belt replacement NOTE: When operating in salt water, turbid or muddy water, the engine should be flushed with clean water after each use.
Do not attempt to di- agnose 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.
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- pair it immediately. Checkpoints...
O-ring to make sure they are in good condition. Replace them if necessary. If any water is found in the fuel, the Yamaha portable fuel tank or other fuel tanks should be checked and cleaned. Maintenance Reinstall the filter element in the filter housing.
If you have difficulty veri- fying the idle speed, or the idle speed requires adjustment, consult a Yamaha dealer or other qualified mechanic. Verify whether the idle speed is set to specification.
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Con- tinued operation with a problem could Maintenance cause severe engine damage. Consult your Yamaha dealer if the problem cannot be located and corrected. Turn off the engine and wait 3 minutes. Recheck the oil level using the dipstick to be sure the level falls between the upper and lower marks.
EMU29140 Engine oil leakage Check for oil leaks on the around the engine. NOTE: If any leaks are found, consult your Yamaha dealer. EMU29153 Checking power trim and tilt system EWM00430 WARNING...
Activate the trim-up switch until the tilt rod is fully extended. Unlock the tilt support lever. Tilt the outboard motor down. Check that the tilt rod and trim rods operate smooth- NOTE: Consult your Yamaha dealer if any operation is abnormal. EMU29171 Checking propeller EWM00321 WARNING...
Be sure to use a new cotter pin and bend the ends over securely. Otherwise the propeller could come off during opera- tion and be lost. Apply Yamaha marine grease or a corro- sion resistant grease to the propeller shaft. Install the thrust washer and propeller on the propeller shaft.
Consult a Yamaha dealer for re- pair of the lower unit seals. NOTE: For disposal of used oil consult your Yamaha dealer. With the outboard motor in a vertical po- sition, and using a flexible or pressurized filling device, inject the gear oil into the gear oil drain screw hole.
Do not paint anodes, as this would render them ineffective. NOTE: Inspect ground leads attached to external an- odes on equipped models. Consult a Yamaha dealer for inspection and replacement of inter- nal anodes attached to the power unit. EMU29320...
If the battery will be stored for longer than a month, check the specific gravity of the fluid at least once a month and recharge the battery when it is low. NOTE: Consult a Yamaha dealer when charging or re-charging batteries. EMU30051 Connecting the battery EWM00570...
5. Large black lead 6. Negative connecting cable 7. Power for accessories NOTE: If connecting an accessory battery, consult your Yamaha dealer about correct wiring. EMU29370 Disconnecting the battery Disconnect the BLACK cable from the NEGA- TIVE (-) terminal first. Then disconnect the RED cable from the POSITIVE (+) terminal.
Maintenance EMU29400 Coating the boat bottom A clean hull improves boat performance. The boat bottom should be kept as clean of marine growth as possible. If necessary, the boat bot- tom can be coated with an anti-fouling paint approved for your area to inhibit marine growth.
A. Check for cause of electric overload and repair. Replace fuse with one of correct am- perage. Q. Are starter components faulty? A. Have serviced by a Yamaha dealer. Q. Is shift lever in gear? A. Shift to neutral. Engine will not start (starter operates).
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Q. Is fuel filter clogged? A. Clean or replace filter. Q. Have ignition parts failed? A. Have serviced by a Yamaha dealer. Q. Has warning system activated? A. Find and correct cause of warning. Q. Is spark plug gap incorrect? A.
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A. Distribute load to place boat on an even plane. Q. Is water pump or thermostat faulty? A. Have serviced by a Yamaha dealer. Q. Is there excess water in fuel filter cup? A. Drain filter cup. Engine power loss.
A. Remove and clean propeller. Q. Is motor mounting bolt loose? A. Tighten bolt. Q. Is steering pivot loose or damaged? A. Tighten or have serviced by a Yamaha dealer. EMU29431 Temporary action in emergency EMU29440 Impact damage...
Trouble Recovery EMU29492 Replacing fuse If the fuse has blown on an electric start mod- el, open the fuse box and use a fuse puller to replace the fuse with a spare one of the prop- er amperage. EWM00630 WARNING Be sure to use the specified fuse.
NOTE: Consult your Yamaha dealer if the new fuse immediately blows again. EMU29520 Power trim and tilt will not operate If the engine cannot be tilted up or down with the power trim and tilt/ the power tilt because of a discharged battery or a failure with the power trim and tilt unit/the power tilt, the en- gine can be tilted manually.