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. VZ300C In this Owner’s Manual particularly important...
Table of contents General information ......1 Overheat warning indicator (digital type) ..........17 Identification numbers record..1 Speedometer (digital type) ....17 Outboard motor serial number ..1 Trim meter (digital type) ....18 Key number........1 Hour meter (digital type)....18 Emission control information ...
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YEAR LIMITED WARRANTY ..66 Periodic maintenance....43 IMPORTANT WARRANTY Replacement parts ......43 INFORMATION IF YOU USE YOUR Maintenance chart ......44 YAMAHA OUTSIDE U.S.A. OR Maintenance chart (additional)..45 CANADA ........69 Greasing ......... 46 Cleaning and adjusting spark plug ..........46 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 ZMU02095 ZMU01856 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 YAMALUBE 2 STROKE OUTBOARD OIL or The rules presented here in your Owner’s an equivalent TC-W3 certified ouboard oil. Manual are condensed, and have been pro- EWM01270 vided for your convenience only. Consult WARNING your local U.S. Coast Guard Auxiliary or De- Do not add gasoline to the oil tank.
General information stances, which may render a departure from way! Both of you should alter course to avoid the above rules necessary in order to avoid an accident. You should keep the other ves- immediate danger.” sel on your port (left) side. This rule doesn’t In other words, follow the standard rules ex- apply if both of you will clear one another if cept when a collision will occur unless both...
General information course and speed. You must stay out of its In a narrow channel, a sailing vessel way until you are clear of it. Likewise, if an- should not hamper the safe passage of other vessel is passing you, you should a power-driven vessel which can navi- maintain your speed and direction so that the gate only in such a channel.
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.
For instructions on propeller removal and in- on the engine. stallation, see page 51. Yamaha outboard motors are fitted with pro- EMU25770 pellers chosen to perform well over a range Start-in-gear protection of applications, but there may be uses where...
Basic components EMU25794 Main components NOTE: * May not be exactly as shown; also may not be included as standard equipment on all mod- els. VZ300C YAMAHA SPEED SPEED Km/h knot mile TRIP TRIP TIME BATT BATT mode mode ZMU02097 1.
Basic components 6. Throttle 7. Fully open EMU26200 Neutral interlock trigger To shift out of neutral, first pull the neutral in- terlock trigger up. 1. Power trim and tilt switch 2. Remote control lever 3. Neutral interlock trigger 4. Neutral throttle lever 5.
Basic components EMU25990 Engine stop lanyard switch The lock plate must be attached to the en- gine 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. Should the operator fall overboard or leave the helm, the lanyard will pull out the lock plate, stopping ignition to the engine.
Basic components EMU26140 Power trim and tilt switch on remote control The power trim and tilt system adjusts the outboard motor angle in relation to the tran- som. Pressing the switch “ ” (up) trims the outboard motor up, then tilts it up. Pressing the switch “...
Basic components while the boat is moving could increase protect the engine from electrochemical the risk of falling overboard and could corrosion. Never paint the trim tab as it distract the operator, increasing the risk will become ineffective as an anode. of collision with another boat or an obsta- cle.
Basic components ter passages of the motor using a garden hose and tap water. NOTE: For details on usage, see page 41. ZMU01864 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. ZMU01866 When installing the cowling, check to be sure it fits properly in the rubber seal.
Basic components 7. Mode button EMU26550 Oil level indicator (digital type) This indicator shows the engine oil level. If the oil level falls below the lower limit, the warning indicator will start to blink. For fur- ther information, see page 21. ECM00030 CAUTION: ZMU01868...
Basic components ting the selector switch on the back of the EMU26650 Hour meter (digital type) gauge. See the illustration for settings. This meter shows the number of hours the engine has been run. It can be set to show the total number of hours or the number of hours for the current trip.
ECM00860 CAUTION: NOTE: The trip distance is shown in kilometers or The Yamaha fuel tank sensor differs from miles depending upon the unit of measure- conventional sensors. Incorrectly setting ment selected for the speedometer. the selector switch on the gauge will give The trip distance is kept in memory by bat- false readings.
Do not continue to operate the engine if a with full throttle if a warning device has warning device has activated. Consult activated. Get back to the port within troll- your Yamaha dealer if the problem can- ing engine speed. not be located and corrected. EMU26811 Overheat warning This engine has an overheat warning device.
Basic components ZMU01871 If the warning system has activated, stop the The oil level warning indicator will light. engine and check the cooling water inlet for The buzzer will sound. clogging. 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-...
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 de- termine the optimum mounting height. Consult your Yamaha dealer or boat man- ufacturer for further information on deter- mining the proper mounting height. For instructions on setting the trim angle of the outboard motor, see page 32.
If you have an easy-plan- Check fuel line connections to be sure they ing boat, accelerate at full throttle onto are tight (if equipped Yamaha fuel tank or plane, then immediately reduce the boat tank). throttle to 3000 r/min or less.
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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...
When enough de- ZMU01877 posits collect, piston rings begin sticking. Performance drops and engine wear in- Turn on the main switch. The Yamaha creases dramatically. oil injection system will automatically While many additives available may reduce feed oil from the remote oil tank to the deposits, Yamaha recommends the use of 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...
Operation that could tear loose. Do not route the (on). lanyard where it could become entan- ECM00191 CAUTION: gled, preventing it from functioning. Never turn the main switch to “ ” Avoid accidentally pulling the lanyard (start) while the engine is running. during normal operation.
Stop the engine and check quickly and firmly from neutral to forward. whether the cooling water inlet on the lower case or the cooling water pilot hole is blocked. Consult your Yamaha dealer if the problem cannot be located and cor- rected. EMU27781...
Operation EMU27820 the boat, sea conditions, and running speed. Stopping engine EWM00740 WARNING Before stopping the engine, first let it cool off for a few minutes at idle or low speed. Stop- Excessive trim for the operating condi- ping the engine immediately after operating tions (either trim up or trim down) can at high speed is not recommended.
Operation body parts between the drive unit and “ ” (down). clamp bracket. Make test runs with the trim set to different Use caution when trying a trim position angles to find the position that works best for for the first time. Increase speed gradu- your boat and operating conditions.
Operation formance further, and the boat may “por- EMU27931 Tilting up and down poise” (hop in the water), which could throw If the engine will be stopped for some time or the operator and passengers overboard. 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 power tilt switch “ ” (up) until the out- in the power trim and tilt unit loses pres- board motor has tilted up completely. sure. If the trim rods equipped: once the out- board motor is supported with the tilt support lever, press the power trim and tilt switch “...
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 ZMU01885 CAUTION:...
NOTE: For cooling system flushing instructions, see page 39. 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.
Maintenance EMU28212 Min. cold cranking amps (CCA/SAE): Specifications 512.0 A Dimension: Min. marine cranking amps (MCA/ABYC): Overall length: 675.0 A 906 mm (35.7 in) Min. reserve capacity (RC/SAE): Overall width: 182 minutes 568 mm (22.4 in) Alternator output for battery DC: Overall height L: 50.0 A 1714 mm (67.5 in)
Do not use any chemical goods contain- hazard. ing Silicon, Phosphorus, or Lead. Con- EWM00700 sult your Yamaha dealer for details on the WARNING use of chemical goods for storage. Never get under the lower unit while it is EMU28301 tilted, even if a motor support bar is used.
Run the engine at idle in neutral for about 10–15 minutes. Just prior to turning off the engine, quick- ly spray “Yamaha Stor-Rite Engine Fogging Oil” (Part No. LUB-STRRT-12- 00) alternately into each carburetor / ZMU02361 each intake manifold.
Wax the cowling with a non-abrasive ways apply. Consult your battery wax such as “Yamaha Silicone Wax” manufacturer’s instructions. (Part No. ACC-11000-15-02). Procedure EMU28430 Disconnect and remove the battery from Battery care the boat. Always disconnect the black...
A touch-up paint is avail- ECM00540 CAUTION: able from your Yamaha dealer. Do not leave the garden hose connector loose on the bottom cowling fitting or let the hose hang free during normal opera-...
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) VZ300C ZMU01986 sparks, which could lead to explosion or EMU28950 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.
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. EMU29150 Checking power trim and tilt system EWM00430...
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...
NOTE: eration and be lost. If the shear pin equipped: it is designed to Apply Yamaha marine grease or a cor- break if the propeller hits a hard underwater rosion resistant grease to the propeller obstacle to help protect the propeller and 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- With the outboard motor in a vertical po- ly falls.
Maintenance EMU29311 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.
(if equipped). Replace Q. Is steering pivot loose or damaged? it with a spare one of the proper amperage. A. Tighten or have serviced by a Yamaha EWM00630 dealer. WARNING Be sure to use the specified fuse.
EMU29760 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 motor to a Yamaha dealer, follow the proce- dure below in order to minimize engine dam- age.
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Spray “Fogging Oil” or supply engine oil through the intake manifold and spark plug holes while rotating the flywheel manually. ZMU01911 Take the outboard motor to a Yamaha dealer as soon as possible. ECM00400 CAUTION: Do not attempt to run the outboard motor...
Consumer information EMU29840 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE U.S.A. OR CANADA...
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Printed in Japan September 2003 - 0.1 × 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...