EMU25110 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...
Table of contents General information ......1 Flushing device ....... 18 Tachometer ........19 Identification numbers record... 1 Digital tachometer ......19 Outboard motor serial number ..1 Oil level indicators Key number........1 (three indicators) ......19 Emission control information .... 1 Oil level indicator (digital type) ..
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52 IMPORTANT WARRANTY Periodic maintenance..... 52 INFORMATION IF YOU USE Replacement parts ......52 YOUR YAMAHA OUTSIDE Maintenance chart ......53 U.S.A. OR CANADA ....79 Maintenance chart (additional)..54 Greasing ......... 55 Cleaning and adjusting spark plug .. 55 Checking fuel system ......
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. Key number...
General information particular label. ZMU01856 ZMU04932 EMU25261 Manufactured date label 1. Star labels location This label is attached to the clamp bracket or the swivel bracket. EMU25280 One Star—Low Emission The one-star label identifies engines that meet the Air Resources Board’s 2001 ex- haust emission standards.
General information the outboard should be equal to or less than the rated horsepower capacity of the boat. If the rated horsepower capacity of the boat is unknown, consult the dealer or boat manufacturer. Do not modify the outboard. Modifications could make the motor unfit or unsafe to use.
General information of the road” on page 5. EMU25380 Important labels Stay informed about the weather. Check EMU25395 weather forecasts before boating. Avoid Warning labels 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.
General information propeller with this engine. or another 2-stroke engine oil with a Counterclockwise propellers are marked NMMA-certified TC-W3 rate. with a letter “L” after the size indication. Refer to Owner’s manual. The wrong type of propeller could cause EMU25500 the boat to go in an unexpected direction, Basic boating rules (Rules of which could lead to an accident.
General information vessel will be able to determine how best to Give-Way vessel). Any vessels in the shad- avoid you. ed area must yield to you (they are the Give- Give-way vessel Way vessels). Both you and the meeting The vessel which does not have the right-of- vessel must alter course to avoid each other.
General information vessel is on your port (left) side, remember need to carry a portable air horn, available that you should maintain course and direc- from local marine supply stores. tion, provided the other vessel gives you the Fishing vessel right-of-way All vessels which are fishing with nets, lines right-of-way as it should.
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General information Many bodies of water used by boaters are entirely within the boundaries of a particular state. The Uniform State Waterway Marking System has been devised for these waters. This system uses buoys and signs with dis- tinctive shapes and colors to show regulato- ry or advisory information.
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.
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.
60. on the engine. EMU25770 Yamaha outboard motors are fitted with pro- Start-in-gear protection pellers chosen to perform well over a range Yamaha outboard motors or Yamaha-ap- of applications, but there may be uses where...
Basic components EMU25795 Main components NOTE: * May not be exactly as shown; also may not be included as standard equipment on all mod- els. Z250D, LZ250D, Z300D, LZ300D YAMAHA YAMAHA YAMAHA FUEL MANAGEMENT SPEED Km/h knot Km/L mile TRIP...
Basic components erator button and move the remote control lever. 1. Neutral interlock trigger ZMU04575 EMU26211 1. Fully open Neutral throttle lever 2. Fully closed To open the throttle without shifting into ei- 3. Free accelerator ther forward or reverse, put the remote con- trol lever in the neutral position and lift the NOTE: neutral throttle lever.
Basic components there is too much resistance, it could be to a secure place on your clothing, or difficult to move throttle lever or grip, your arm or leg while operating. which could result in an accident. Do not attach the lanyard to clothing that could tear loose.
Basic components EMU26141 2. Lock plate Power trim and tilt switch on remote control or tiller handle EMU26090 Main switch The power trim and tilt system adjusts the The main switch controls the ignition system; outboard motor angle in relation to the tran- its operation is described below.
Basic components while the boat is moving could increase NOTE: the risk of falling overboard and could On the dual engine control, the switch on distract the operator, increasing the risk the remote control grip controls both out- of collision with another boat or an obsta- board motors at the same time.
Basic components 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. When installing the cowling, check to be sure it fits properly in the rubber seal. Then lock the cowling by moving the lever(s) down- ward.
Basic components ZMU01958 ZMU01866 1. Flushing device 1. Tachometer 2. Trim meter EMU26470 3. Hour meter Tachometer 4. Oil level indicator This gauge shows the engine speed and has 5. Overheat warning indicator the following functions. 6. Water separator warning indicator 7.
Basic components page 26. ECM00050 CAUTION: Do not continue to run the engine if the overheat warning indicator is on. Serious engine damage will occur. ZMU04580 1. Oil level indicators EMU26550 Oil level indicator (digital type) This indicator shows the engine oil level. If the oil level falls below the lower limit, the ZMU01868 warning indicator will start to blink.
Basic components turning on the main switch to make sure all power trim and tilt switch. segments come on. EMU26620 Trim meter (digital type) NOTE: This meter shows the trim angle of your out- The speedometer displays km/h, mph, or board motor.
The trip distance is shown in kilometers or CAUTION: miles depending upon the unit of measure- The Yamaha fuel tank sensor differs from ment selected for the speedometer. conventional sensors. Incorrectly setting The trip distance is kept in memory by bat- the selector switch on the gauge will give tery power.
CAUTION: give false readings. Get back to the port soon if a warning de- vice has activated. For charging the bat- tery, consult your Yamaha dealer. ZMU01745 EMU26720 Fuel warning indicator If the fuel level decreases to one segment, 1.
Basic components port and starboard engines. 3. Water separator warning indicator (operates only if the sensor has been installed) NOTE: The fuel flow meter displays gallons/hour NOTE: or liters/hour according to operator prefer- After the main switch is first turned on, all ence.
(winter or summer fuel and amount of additives). 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...
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. EMU26823 Overheat warning (twin engines) ZMU01754 This engine has an overheat warning device.
Basic components on the engine not affected by overheating, turn off the main switch of the engine over- heating. EMU26843 Oil level warning and oil filter clogging warning 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.
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Basic components ZMU03025 ZMU01952 1. Oil filter START START ZMU04584 If the warning system has been activated, stop the engine and check for the cause. NOTE: The warning for oil filter clogging is similar to the warnings for low oil level and overheat- ing.
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.
Test runs at different heights can help deter- mine the optimum mounting height. Con- sult your Yamaha dealer boat manufacturer for further information on de- termining the proper mounting height. For instructions on setting the trim angle of the outboard motor, see page 40.
Do not exceed half throttle (approxi- Check fuel line connections to be sure they mately 3000 r/min). Vary engine speed are tight (if equipped Yamaha fuel tank or occasionally. If you have an easy-plan- boat tank). ing boat, accelerate at full throttle onto...
After any air in the oil lines has been expelled, the oil injection system should supply oil normally. If no oil is flowing after 10 minutes of idling, consult your Yamaha dealer. ECM00560 CAUTION: Be sure to take the above steps when...
While many additives available may reduce deposits, Yamaha recommends the use of Ring Free Fuel Additive, available from your Yamaha dealer. Ring Free Fuel Addi- 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.
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Imp gal) can be added, and the bottom oil level line indicates approximately 3.8 L (1 US gal, 0.8 Imp gal) can be added. Turn on the main switch. The Yamaha oil injection system will automatically feed oil from the remote oil tank to the engine oil tank.
Operation EMU27321 Oil level indicator operation The various functions of the oil level system are as follows: EMU27381 Oil level indicator Electric start models Oil level warning Oil level warning Engine oil Remote oil indicator indicator (analog Remarks tank tank (digital tachometer) tachometer)
Operation EMU27450 Operating engine EMU27480 Feeding fuel EWM00420 WARNING 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. EMU27490 When the air vent screw is loosened, Starting engine...
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Operation a secure place on your clothing, or your Turn the main switch to “ ” (on). arm or leg. Then install the lock plate on NOTE: the other end of the lanyard into the en- Dual engine users: When the main switch is gine stop switch.
” (on), wait check whether the cooling water inlet on 10 seconds, then crank the engine the lower case or the cooling water pilot again. hole is blocked. Consult your Yamaha dealer if the problem cannot be located and corrected. START ZMU01881...
Operation Pull up the neutral interlock trigger (if equipped) and move the remote control equipped) and move the remote control lever quickly and firmly from neutral to lever quickly and firmly from neutral to reverse. forward. ZMU04598 ZMU04597 EMU27820 Stopping engine EMU27784 Reverse (automatic reverse lock and Before stopping the engine, first let it cool off...
Operation boat, engine, and propeller. Correct trim is also affected 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 steering the boat more difficult.
Operation gle, also be careful not to pinch any body parts between the drive unit and clamp bracket. 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 Bow Up NOTE: Too much trim-out puts the bow of the boat Depending on the type of boat, the outboard too high in the water. Performance and econ- motor trim angle may have little effect on the omy are decreased because the hull of the trim of the boat when operating.
Operation on page 39. 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 tiller handle (if equipped) because this could break the handle. EMU28005 Procedure for tilting up Power trim and tilt models / power tilt models...
Operation EMU28052 Procedure for tilting down Power trim and tilt models / power tilt models Push the power tilt / power trim and tilt switch “ ” (up) until the outboard motor is supported by the tilt rod and the tilt support lever / tilt support knob becomes free.
Operation ting up for and cruising in shallow water. Otherwise severe damage from overheat- ing can result. EMU28184 Procedure for power trim and tilt / power tilt models Place the gear shift lever in neutral. ZMU04603 ZMU01979 EMU28060 Cruising in shallow water The outboard motor can be tilted up partially to allow operation in shallow water.
NOTE: For cooling system flushing instructions, see page 48. 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.
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. 54.0 Nm (39.8 ft-lb) (5.51 kgf-m)
Before starting the engine, be sure to your outboard motor serviced by an autho- supply water to the cooling water passag- rized Yamaha dealer prior to storage. How- ever, you, the owner, with a minimum of tools, can perform the following procedures.
Seal replacement should be per- NOTE: formed by an authorized Yamaha dealer When using the flushing attachment, prior to use. maintain adequate water pressure and a Grease all grease fittings.
Maintenance and get immediate medical attention. After shutting off the engine, unscrew Antidote (INTERNAL): the garden hose connector from the fit- Drink large quantities of water or milk ting on the bottom cowling. followed by milk of magnesia, beaten egg, or vegetable oil. Get immediate medical attention.
If you or the owner is not famil- ting after flushing the engine. iar with machine servicing, this work NOTE: should be done by your Yamaha dealer or When flushing the engine with the boat in other qualified mechanic. the water, tilting up the outboard motor un-...
Refer to the sections in this chapter for explanations of each owner-specific action. 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...
Maintenance EMU28931 Greasing Yamaha marine grease (Water resistant grease) Z250D, LZ250D, Z300D, LZ300D ZMU01939 sparks, which could lead to explosion or EMU28951 Cleaning and adjusting spark plug fire. EWM00560 The spark plug is an important engine com- WARNING ponent and is easy to inspect. The condition...
ZMU01892 Check the fuel lines for leaks, crack, or mal- 1. Spark plug gap function. If a problem is found, your Yamaha 2. Spark plug I.D. mark (NGK) dealer or other qualified mechanic should re- pair it immediately.
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. Do not perform this procedure on a hot or running engine. Allow the engine to cool.
Replace them if EWM00450 necessary. If any water is found in the WARNING fuel, the Yamaha portable fuel tank or Do not touch or remove electrical parts other fuel tanks should be checked and when starting or during operation.
There is a water trap at the bottom of the en- leaks from the joints between the exhaust gine oil tank. If water or foreign matter is vis- cover, cylinder head, and body cylinder. ible in this trap, consult your Yamaha dealer. EMU29153 Checking power trim and tilt system EWM00430...
ZMU04936 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. EMU29171 ZMU04935 Checking propeller EWM00321 1. Tilt support lever...
Maintenance the main switch to “ ” (off) and re- move the key, and remove the lanyard from the engine stop switch. Turn off the battery cut-off switch if your boat has one. Do not use your hand to hold the pro- peller when loosening or tightening the propeller nut.
Never get under the lower unit while it Apply Yamaha marine grease or a cor- is tilted, even when the tilt support lever rosion resistant grease to the propeller or knob is locked. Severe injury could shaft.
Insert and tighten the gear oil drain NOTE: screw. For disposal of used oil consult your Yamaha EMU29312 dealer. Inspecting and replacing anode(s) Yamaha outboard motors are protected from With the outboard motor in a vertical po- corrosion by sacrificial anodes.
SKIN - Flush with water. anodes on equipped models. Consult a EYES - Flush with water for 15 minutes Yamaha dealer for inspection and replace- and get immediate medical attention. ment of internal anodes attached to the pow- Antidote (INTERNAL): er unit.
NOTE: copper or graphite. These paints can cause If a battery selector switch is desired, consult more rapid engine corrosion. your Yamaha dealer about correct wiring. EMU29370 Disconnecting the battery Disconnect the BLACK cable from the NEG- ATIVE (-) terminal first. Then disconnect the RED cable from the POSITIVE (+) terminal.
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.
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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.
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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.
Loosen the manual valve screw by turn- electric system damage and a fire hazard. ing it counterclockwise until it stops. NOTE: Consult your Yamaha dealer if the new fuse immediately blows again. ZMU01905 1. Manual valve screw Put the engine in the desired position,...
Trouble Recovery EMU29670 Engine fails to operate EMU29741 Low oil level warning activates If the oil level is allowed to drop too low, the red segment will appear on the oil level indi- cator, the buzzer will sound, and engine speed will be limited to about 2000 r/min.
Treatment of submerged motor manually. 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 EMU29840 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE U.S.A. OR CANADA...
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Printed in Japan April 2004–0.4 × 1 ! Printed on recycled paper...
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(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...
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PLACE POSTAGE HERE ATTN: WARRANTY DEPARTMENT...