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 ....... 19 Digital tachometer ......19 Identification numbers record..1 Oil level indicator (digital type) ..19 Outboard motor serial number ..1 Overheat warning indicator (digital Key number........1 type) ..........20 Emission control information ...
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Replacement parts ......50 IMPORTANT WARRANTY Maintenance chart ......51 INFORMATION IF YOU USE Maintenance chart (additional)..52 YOUR YAMAHA OUTSIDE Greasing ......... 53 U.S.A. OR CANADA ....76 Cleaning and adjusting spark plug ..........53 Checking fuel system ...... 54 Inspecting fuel filter ......
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 ZMU01856 ZMU01946 EMU25260 EMU25280 Manufactured date label One Star—Low Emission This label is attached to the clamp bracket or The one-star label identifies engines that the swivel bracket. meet the Air Resources Board’s 2001 ex- haust emission standards. Engines meeting these standards have 75% lower emissions than conventional carbureted two-stroke en- gines.
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 EMU25392 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. EMU25500 Basic boating rules (Rules of Counterclockwise propellers the road) marked with a letter “L” after the size indication. Just as there are rules which apply when you The wrong type of propeller could are driving on streets and high ways, there cause the boat to go in an unexpected are waterway rules which apply when you...
General information 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. way has the duty to take positive and timely action to stay out of the way of the Stand-On vessel.
General information 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. or trawls are considered to be “fishing ves- sels” under the International Rules. Vessels with trolling lines are not considered fishing vessels.
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General information state. The Uniform State Waterway Marking ed areas, danger areas, and general infor- System has been devised for these waters. mation. This system uses buoys and signs with dis- Remember, markings may vary by geo- tinctive shapes and colors to show regulato- graphic location.
Take care not to spill gasoline. If gaso- Yamaha does not recommended gasohol line spills, wipe it up immediately with containing methanol because it can cause dry rags.
For instructions on propeller removal and in- stallation, see page 58. 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...
Basic components EMU25792 Main components NOTE: * May not be exactly as shown; also may not be included as standard equipment on all mod- els. Z300C, LZ300C YAMAHA YAMAHA FUEL MANAGEMENT SPEED SPEED Km/h knot Km/L mile TRIP TIME BATT...
Basic components erator button and move the remote control lever. 1. Neutral interlock trigger EMU26210 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 your arm or leg while operating. difficult to move throttle lever or grip, Do not attach the lanyard to clothing which could result in an accident. that could tear loose. Do not route the lanyard where it could become entan- gled, preventing it from functioning.
Basic components EMU26090 Main switch The main switch controls the ignition system; its operation is described below. “ ” (off) With the main switch in the “ ” (off) posi- tion, the electrical circuits are off, and the key can be removed. “...
Basic components ZMU01862 EMU26150 NOTE: Power trim and tilt switch on bottom For instructions on using the power trim and engine cowling tilt switch, see page 41. The power trim and tilt switch is located on EMU26161 the side of the bottom engine cowling. Press- Power trim and tilt switches (twin ing the switch “...
Basic components EMU26240 Trim tab with anode The trim tab should be adjusted so that the steering control can be turned to either the right or left by applying the same amount of force. EWM00840 WARNING An improperly adjusted trim tab could cause difficult steering.
Basic components EMU26490 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. ZMU01951 ZMU01891 1.
Basic components ZMU01867 1. Speedometer 1. Oil level indicator 2. Fuel gauge EMU26581 3. Trip meter/clock/voltmeter Overheat warning indicator (digital 4. Warning indicator(s) type) NOTE: If the engine temperature rises too high, the After the main switch is first turned on, all warning indicator will start to blink.
Basic components Changing the display format 3. Selector switch (for fuel sensor) Pressing the “ ” (mode) button chang- EMU26620 es the display format in the following pat- Trim meter (digital type) tern: This meter shows the trim angle of your out- Total hours→Trip hours→Display off board motor.
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 dealer on how to correctly set the selec-...
Get back to the port soon if a warning de- to normal operation. Watch the gauge when vice has activated. For charging the bat- turning on the main switch to make sure all tery, consult your Yamaha dealer. segments come on. EMU26750 Fuel flow meter...
Basic components port and starboard engines. NOTE: The fuel flow meter displays gallons/hour or liters/hour according to operator prefer- ence. Select the desired unit of measure- ment by setting the selector switch on the back of the gauge during installation. ZMU01751 EMU26770 Fuel economy...
(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...
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. EMU26821 Overheat warning (twin engines) This engine has an overheat warning device.
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Basic components ZMU01952 ZMU01871 The oil level warning indicator will light. The buzzer will sound. 1. Oil filter 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 EMU26900 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 39.
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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Operation feed oil from the remote oil tank to the engine oil tank. Operate the engine normally. ECM00570 CAUTION: When the engine is operated for the first time or stored for a period of time, a min- imum of 5 liters (5.3 US qt, 4.4 Imp qt) of oil should be kept in the remote 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 whether the cooling water inlet on the 10 seconds, then crank the engine lower case or the cooling water pilot hole again. is blocked. Consult your Yamaha dealer if the problem cannot be located and cor- rected. START ZMU01881...
Operation Pull up the neutral interlock trigger (if equipped) and move the remote control lever quickly and firmly from neutral to forward. EMU27820 Stopping engine Before stopping the engine, first let it cool off for a few minutes at idle or low speed. Stop- EMU27781 Reverse ping the engine immediately after operating...
Operation the boat begins to feel unstable or is hard to steer, slow down and/or readjust the trim angle. After stopping the engine, disconnect the fuel line or close the fuel cock if there is a fuel joint or a fuel cock on the boat. Tighten the air vent screw on the fuel tank cap (if equipped).
Operation bottom engine cowling (if equipped) To raise the bow (trim-out), press the switch only when the boat is at a complete “ ” (up). stop with the engine off. To lower the bow (trim-in), press the switch “ ” (down). Adjust the outboard motor trim angle using Make test runs with the trim set to different the power trim and tilt switch.
Operation boat is pushing the water and there is more motor trim angle may have little effect on the air drag. Excessive trim-out can also cause trim of the boat when operating. the propeller to ventilate, which reduces per- EMU27931 formance further, and the boat may “por- Tilting up and down poise”...
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Operation board motor or close the fuel cock. Press the power trim and tilt switch/ power tilt switch “ ” (up) until the out- board motor has tilted up completely. ZMU01886 EWM00260 WARNING After tilting the outboard motor, be sure to support it with the tilt support knob or tilt support lever.
Operation EMU28051 Procedure for tilting down (power trim and tilt/power tilt models) Power trim and tilt model / power tilt model 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.
NOTE: For cooling system flushing instructions, see page 46. 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- ZMU01935 dy) water conditions.
Maintenance EMU28211 Remote control Specifications Starting system: Dimension: Electric Overall length: Battery: 868 mm (34.2 in) Min. cold cranking amps (CCA/SAE): Overall width: 512.0 A 568 mm (22.4 in) Min. marine cranking amps (MCA/ABYC): Overall height X: 675.0 A 1830 mm (72.0 in) Min.
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)
Maintenance Stabilizer” eliminates the need to drain the ing and fogging at the same time. fuel system. Consult your Yamaha dealer or EWM00090 WARNING other qualified mechanic if the fuel system is Do not touch or remove electrical parts to be drained instead.
Seal replacement should be per- Antidote (EXTERNAL): formed by an authorized Yamaha dealer SKIN - Flush with water. prior to use. EYES - Flush with water for 15 minutes Grease all grease fittings.
Maintenance cool, dry, well-ventilated place out of di- off the water and disconnect the garden rect sunlight. hose. Once a month, check the specific gravity When flushing is complete, reinstall the of the electrolyte and recharge as re- garden hose connector on the fitting on quired to prolong battery life.
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 sys- tems may be performed by any marine engine repair establishment or individual.
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) Z300C, LZ300C ZMU01939 EMU28950 sparks, which could lead to explosion or 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.
If any water is found in the fuel, the parts while the engine is running. Yamaha portable fuel tank or other fuel 2-hp models: The propeller rotates tanks should be checked and cleaned.
Make sure no one is under the outboard gine oil tank. If water or foreign matter is vis- motor before performing this test. ible in this trap, consult your Yamaha dealer. Check the power trim and tilt unit for any sign of oil leaks.
Unlock the tilt sup- port lever. 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...
Remove the propeller nut, washer, and eration and be lost. spacer (if equipped). Apply Yamaha marine grease or a cor- rosion resistant grease to the propeller shaft. Install the thrust washer and propeller on the propeller shaft.
Never get under the lower unit while it NOTE: is tilted, even when the tilt support lever For disposal of used oil consult your Yamaha or knob is locked. Severe injury could dealer. occur if the outboard motor accidental- ly falls.
Maintenance EMU29310 EMU29320 Inspecting and replacing anode(s) Checking battery (for electric start Yamaha outboard motors are protected from models) corrosion by sacrificial anodes. Inspect the EWM00330 WARNING external anodes periodically. Remove scales from the surfaces of the anodes. Consult a Battery electrolytic fluid is dangerous;...
7. Small red lead for accessory battery charg- ing (optional part) NOTE: If a battery selector switch is desired, consult ZMU01943 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 EMU29740 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 August 2003 - 1.4 × 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...
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