EMU25110 tain maximum enjoyment from your new Yamaha. If you have any question about the operation or maintenance of your outboard motor, please consult a Yamaha dealer. In this Owner’s Manual particularly important OWNER’S MANUAL...
Table of contents General information ......1 Trim tab with anode......16 Trim rod (tilt pin) ......17 Identification numbers record..1 Tilt support lever for power trim and Outboard motor serial number ..1 tilt or hydro tilt model..... 17 Key number........
YEAR LIMITED WARRANTY ..71 Cleaning and adjusting spark IMPORTANT WARRANTY plug ..........49 INFORMATION IF YOU USE Checking fuel system ...... 49 YOUR YAMAHA OUTSIDE THE Inspecting fuel filter ......50 USA OR CANADA ...... 74 Cleaning fuel filter ......50...
General information should give you an understanding of the motor and its operation. Before operating the boat, read any own- EMISSION CONTROL INFORMATION er’s or operator’s manuals supplied with it ENGINE FAMILY : THIS ENGINE CONFORMS TO 2001 U.S. EPA REGULATIONS FOR MARINE SI ENGINES. REFER TO THE OWNERS MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.
Never illegally discard (dump) the product. Attach the engine stop switch lanyard cord Yamaha recommends consulting the deal- to a secure place on your clothing, or your er on discarding the product. arm or leg while operating. If you acciden- Be informed about boating safety.
General information EMU25401 These rules determine which vessel has the Label right-of-way, and what each vessel should EWM01260 WARNING Stand-on vessel Be sure shift control is in neutral before The vessel with the right-of-way has the duty starting engine. (except 2HP) to continue its course and speed, except to Do not touch or remove electrical parts avoid an immediate collision.
General information sel head-on) Crossing When two power driven vessels are crossing Crossing: (you are traveling across the oth- each other’s path close enough to run the er vessel’s path) risk of collision, the vessel which has the oth- Overtaking: (you are passing or being er on the starboard (right) side must keep out passed by another vessel) of the way of the other.
General information bend that may obstruct the view of other wa- er is going towards the port). This means that ter vessels, the operator should sound a pro- red buoys are passed on the starboard longed blast on the whistle (4 to 6 seconds). (right) side when proceeding from open wa- If another vessel is around the bend, it too ter into port, and black buoys are to port (left)
General information ZMU01708 EMU25540 away from sparks, flames, or other Fueling instructions sources of ignition. EWM00010 Stop engine before refueling. WARNING Refuel in a well-ventilated area. Refuel GASOLINE AND ITS VAPORS ARE HIGH- portable fuel tanks off the boat. LY FLAMMABLE AND EXPLOSIVE! Take care not to spill gasoline.
The performance of your outboard motor will the fuel meets minimum octane ratings. be critically affected by your choice of propel- Yamaha does not recommended gasohol ler, as an incorrect choice could adversely containing methanol because it can cause affect performance and could also seriously fuel system damage or engine performance damage the motor.
53. on the engine. EMU25770 Start-in-gear protection Yamaha outboard motors are fitted with pro- Yamaha outboard motors or Yamaha-ap- pellers chosen to perform well over a range proved remote control units are equipped of applications, but there may be uses where with start-in-gear protection device(s).
Basic components EMU25797 Main components NOTE: * May not be exactly as shown; also may not be included as standard equipment on all mod- els. ZMU04945 1. Top cowling 15. Remote control box (side mount type)* 2. Top cowling lock lever 16.
Basic components tions. ZMU03157 1. Power trim and tilt switch 2. Remote control lever 1. Fuel joint 3. Neutral interlock trigger 2. Fuel gauge 4. Neutral throttle lever 3. Fuel tank cap 5. Main switch / choke switch 4. Air vent screw 6.
Basic components 6. Throttle 7. Fully open EMU26201 Neutral interlock trigger To shift out of neutral, first pull the neutral in- terlock trigger up. 1. Fully open 2. Fully closed EMU25911 Tiller handle To change direction, move the tiller handle to the left or right as necessary.
Basic components 1. Throttle indicator 1. Forward “ ” 2. Neutral “ ” EMU25971 3. Reverse “ ” Throttle friction adjuster A friction device provides adjustable resis- EMU25941 tance to movement of the throttle grip or the Throttle grip remote control lever, and can be set accord- The throttle grip is on the tiller handle.
Basic components NOTE: The engine cannot be started with the lock plate removed. When constant speed is desired, tighten the adjuster to maintain the desired throttle set- ting. EMU25990 Engine stop lanyard switch 1. Lanyard 2. Lock plate The lock plate must be attached to the en- gine stop switch for the engine to run.
Basic components EMU26090 EMU26141 Main switch Power trim and tilt switch on remote The main switch controls the ignition system; control or tiller handle its operation is described below. The power trim and tilt system adjusts the “ ” (off) outboard motor angle in relation to the tran- With the main switch in the “...
Basic components DOWN ZMU03096 EMU26151 NOTE: Power trim and tilt switch on bottom For instructions on using the power trim and engine cowling tilt switch, see page 38. The power trim and tilt switch is located on EMU26241 the side of the bottom engine cowling. Press- Trim tab with anode ing the switch “...
Basic components ZMU02528 ZMU03097 EMU26372 1. Trim tab Top cowling lock lever(s) (turn type) 2. Bolt To remove the engine top cowling, turn the lock lever(s) and lift off the cowling. When in- EMU26261 Trim rod (tilt pin) stalling the cowling, check to be sure it fits The position of the trim rod determines the properly in the rubber seal.
Basic components EMU26470 7. Engine trouble warning indicator Tachometer 8. Set button This gauge shows the engine speed and has 9. Mode button the following functions. NOTE: The water separator and engine trouble warning indicators only operate when the en- gine is equipped with the appropriate func- tions.
Basic components rious engine damage will occur. ZMU04581 NOTE: ZMU01867 Memorize the trim angles that work best for 1. Oil level indicator your boat under different conditions. Adjust the trim angle to the desired setting with the EMU26581 Overheat warning indicator (digital power trim and tilt switch.
Warning system ECM00090 CAUTION: Do not continue to operate the engine if a warning device has activated. Consult your Yamaha dealer if the problem can- not be located and corrected. EMU26816 Overheat warning This engine has an overheat warning device.
Basic components ZMU03942 ZMU03026 The buzzer will sound (if equipped on the EMU26846 Oil level warning and oil filter tiller handle, remote control box, or main clogging warning switch panel). Oil injection models This engine has an oil level warning system. If the oil level falls below the lower limit, the warning system will activate.
Operation EMU26901 specific boat and motor combination. Installation EWM00830 ECM00110 WARNING CAUTION: Improper mounting of the outboard mo- Incorrect engine height or obstructions tor could result in hazardous conditions to smooth water flow (such as the design such as poor handling, loss of control, or or condition of the boat, or accessories fire hazards.
Other- mine the optimum mounting height. Con- wise the engine could be completely lost sult your Yamaha dealer boat if it accidentally falls off the transom. manufacturer for further information on de- termining the proper mounting height.
Operation board (if packed). For details, consult EMU27060 Gasoline and engine oil mixing chart your Yamaha dealer. (50:1) EWM00650 WARNING Avoid using bolts, nuts or washers other than those contained in the engine pack- aging. If used, they must be of at least the same quality of material and strength and must be tightened securely.
Fuel tank capacity (if equipped Yamaha Ring Free Fuel Additive, available from fuel tank): your Yamaha dealer. Ring Free Fuel Addi- 25 L (6.60 US gal) (5.50 Imp.gal) tive has repeatedly proven its ability to clean combustion deposits from inside the engine, notably the critical piston-ring-land area, and fuel system components.
EWM00530 WARNING Do not add gasoline into the oil tank. Fire or explosion could result. This engine uses the Yamaha oil injection system, which provides superior lubrication by ensuring the proper oil ratio for all operat- ZMU03370 ing conditions. No fuel premixing is needed.
Operation EMU27321 Oil level indicator operation The various functions of the oil level system are as follows: EMU27360 Electric start models Oil level Oil level warning warning indicator indicator (analog Engine oil tank Remarks (digital tachometer/ tachometer) bottom cowling) Green more than 770 No reﬁlling necessary.
Operation tank cap, loosen it 2 or 3 turns. zontally, otherwise fuel cannot be drawn from the fuel tank. Squeeze the primer pump with the outlet end up until you feel it become firm. ZMU02295 If there is a fuel joint on the motor, firmly connect the fuel line to the joint.
Operation gine stop switch. Turn the main switch to “ ” (start), and hold it for a maximum of 5 seconds. EWM00120 WARNING Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg while operating. Do not attach the lanyard to clothing that could tear loose.
Operation EMU27662 Electric start and remote control models Place the remote control lever in neutral. Turn the main switch to “ ” (on). Turn the main switch to “ ” (start), and hold it for a maximum of 5 seconds. NOTE: The start-in-gear protection device prevents the engine from starting except when in neu-...
Place the throttle grip in the fully closed the lower case or the cooling water pilot position. hole is blocked. Consult your Yamaha dealer if the problem cannot be located and corrected. Move the gear shift lever quickly and...
Operation firmly from neutral to forward. Move the gear shift lever quickly and firmly from neutral to reverse. Remote control models Pull up the neutral interlock trigger (if equipped) and move the remote control lever quickly and firmly from neutral to forward.
Operation ping the engine immediately after operating at high speed is not recommended. EMU27844 Procedure Push and hold the engine stop button or turn the main switch to “ ” (off). ZMU03834 Tighten the air vent screw on the fuel tank cap (if equipped).
Operation the boat, sea conditions, and running speed. clamp bracket. Use caution when trying a trim position EWM00740 WARNING for the first time. Increase speed gradu- Excessive trim for the operating condi- ally and watch for any signs of instabil- tions (either trim up or trim down) can ity or control problems.
Operation Bow Up Too much trim-out puts the bow of the boat too high in the water. Performance and econ- omy are decreased because the hull of the boat is pushing the water and there is more air drag. Excessive trim-out can also cause the propeller to ventilate, which reduces per- formance further, and the boat may “por- poise”...
Operation motor trim angle may have little effect on the trim of the boat when operating. EMU27933 Tilting up and down If the engine will be stopped for some time or if the boat is moored in shallows, the out- board motor should be tilted up to protect the propeller and casing from damage by colli- sion with obstructions, and also to reduce...
Operation ZMU02528 EWM00260 WARNING After tilting the outboard motor, be sure to support it with the tilt support knob or tilt support lever. Otherwise the outboard motor could fall back down suddenly if oil in the power trim and tilt unit loses pres- sure.
Operation EMU28055 Procedure for tilting down (power trim and tilt models / power tilt models) Push the power trim and tilt switch / pow- er tilt switch “ ” (up) until the outboard motor is supported by the tilt rod and the tilt support lever / tilt support knob be- comes free.
For cooling system flushing instructions, see page 43. Cruising in turbid water Yamaha strongly recommends that you use the optional chromium-plated water pump kit (not available for some models) if you use the outboard motor in turbid or muddy water...
Power trim and tilt Performance: Propeller mark: Full throttle operating range: 5000–6000 r/min Fuel and oil: Maximum output: Recommended fuel: 51.5 kW@5500 r/min (70 HP@5500 Regular unleaded gasoline r/min) Min. pump octane: Idling speed (in neutral): 800 ±50 r/min Fuel tank capacity: Engine: 25 L (6.60 US gal) (5.50 Imp.gal)
Spark plug: sition using a motor support device such as 25.0 Nm (18.4 ft-lb) (2.55 kgf-m) a transom saver bar. Consult your Yamaha Propeller nut: dealer for further details. 35.0 Nm (25.8 ft-lb) (3.57 kgf-m)
NOTE: mandatory to prevent excessive engine The use of “Yamaha Fuel Conditioner and damage due to rust. Perform the flush- Stabilizer” eliminates the need to drain the ing and fogging at the same time.
Batteries also generate explosive hydro- seal. Seal replacement should be per- gen gas; therefore, you should always formed by an authorized Yamaha dealer follow these preventive measures: prior to use. Charge batteries in a well-ventilated ar- Grease all grease fittings.
EMU28510 Replacement parts If replacement parts are necessary, use only genuine Yamaha parts or parts of the same type and of equivalent strength and materi- als. Any part of inferior quality may malfunc- tion, and the resulting loss of control could ZMU03223 endanger the operator and passengers.
When operating in salt water, turbid or muddy water, 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. Initial Every 50 hours Item...
When fitting the plug, always clean the gas- Instead, take the outboard motor to a ket surface and use a new gasket. Wipe off Yamaha dealer. You should periodically re- any dirt from the threads and screw in the move and inspect the spark plug because spark plug to the correct torque.
Check the fuel lines for leaks, crack, or mal- There will be fuel in the fuel filter. Keep function. If a problem is found, your Yamaha away from sparks, cigarettes, flames or dealer or other qualified mechanic should re- other sources of ignition.
A necessary. If any water is found in the flushing attachment or test tank can be fuel, the Yamaha portable fuel tank or used. other fuel tanks should be checked and A diagnostic tachometer should be used for cleaned.
Maintenance EMU29153 Checking power trim and tilt system EWM00430 WARNING Never get under the lower unit while it is tilted, even when the tilt support lever is locked. Severe injury could occur if the outboard motor accidentally falls. Make sure no one is under the outboard ZMU03898 motor before performing this test.
Unlock the tilt sup- port lever. ZMU01896 Tilt the outboard motor down. Check that the tilt rod and trim rods operate smoothly. NOTE: Consult your Yamaha dealer if any operation is abnormal. ZMU01897 EMU29171 Checking propeller Checkpoints EWM00321...
Maintenance tion, or other damage. Check the propeller shaft for damage. Check the splines / shear pin for wear or damage. Check for fish line tangled around the pro- peller shaft. 1. Cotter pin 2. Propeller nut 3. Washer 4. Spacer 5.
Maintenance damage. Consult a Yamaha dealer for re- Yamaha dealer. pair of the lower unit seals. Keep away from sparks, cigarettes, flames, or other sources of ignition NOTE: when cleaning the fuel tank. For disposal of used oil, consult your Remove the fuel tank from the boat be- Yamaha dealer.
EMU29320 Checking battery (for electric start external anodes periodically. Remove scales models) from the surfaces of the anodes. Consult a EWM00330 Yamaha dealer for replacement of external WARNING anodes. Battery electrolytic fluid is dangerous; it ECM00720 CAUTION: contains sulfuric acid and therefore is poisonous and highly caustic.
EMU29390 Checking top cowling Check the fitting of the top cowling by push- ing it with both hands. If it is loose have it re- paired by your Yamaha dealer. ZMU04678 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.
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.
Trouble Recovery A. Have serviced by a Yamaha dealer. Q. Are weeds or other foreign matter tangled on gear housing? Q. Is load on boat improperly distributed? A. Remove foreign matter and clean lower A. Distribute load to place boat on an even unit.
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 EMU29432 excessive current flow.
When the emergency starter rope is used to start the engine, the start-in- NOTE: gear protection device does not oper- Consult your Yamaha dealer if the new fuse ate. Make sure the remote control lever immediately blows again. is in neutral. Otherwise the boat could...
Trouble Recovery engine. Use the emergency starter rope only as instructed. Do not touch the fly- wheel or other moving parts when the 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-...
Trouble Recovery EMU29704 NOTE: Cold engine fails to start When the engine does not start with this pro- If the engine fails to start when it is cold, use cedure, see page 66. the following procedure. EMU29670 EWM00410 Engine fails to operate WARNING EMU29691 When starting or operating the engine, do...
Trouble Recovery Turn the main switch to “ ” (start). ECM00191 CAUTION: Never turn the main switch to “ ” (start) 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 ZMU03142...
Treatment of submerged motor emergency starter rope. 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...
Consumer information EMU29841 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA...
Printed in Japan April 2006–0.3 × 1 ! Printed on recycled paper...
(A l’usage du concessionnaire) MODÉLE ET NO. DE SÉRIE DU MOTEUR HORS-BORD (sur l’étiquette d’identification de la presse de fixation) YAMAHA DEALER NUMBER NO. DU CONCESSIONNAIRE YAMAHA DEALER NAME YAMAHA MOTOR CO., LTD. NOM DU MADE IN JAPAN CONCESSIONNAIRE PAYS D'ORIGINE JAPON USAGE...
PLACE POSTAGE HERE ATTN: WARRANTY DEPARTMENT...