EMU25062 ZMU01690 Read this manual carefully before operating this outboard motor. Keep this manual onboard in a waterproof bag when boating. This manual should stay with the outboard motor if it is sold.
Table of contents Safety information......1 Engine oil requirements ....15 Fuel requirements ......15 Outboard motor safety ....1 Gasoline .......... 15 Propeller..........1 Ring Free Fuel Additive....16 Rotating parts........1 Muddy or acidic water ....16 Hot parts ........... 1 Anti-fouling paint ......
Shallow water........ 39 IMPORTANT WARRANTY Cruising in shallow water (manual INFORMATION IF YOU USE tilt models) ........39 YOUR YAMAHA OUTSIDE Cruising in other conditions... 40 THE USA OR CANADA ....64 Maintenance........41 Transporting and storing outboard motor ......41 Clamp screw mounting models ..
Safety information EMU33622 engine stops if the operator falls overboard Outboard motor safety or leaves the helm. This prevents the boat Observe these precautions at all times. from running away under power and leaving EMU36501 people stranded, or running over people or Propeller objects.
Have an approved personal flotation device tions. Overloading or incorrect weight (PFD) on board for every occupant. Yamaha distribution can compromise the boats han- recommends that you must wear a PFD dling and lead to an accident, capsizing or whenever boating.
Safety information Operate defensively at safe speeds and EMU33870 Boat education and training keep a safe distance away from people, ob- Operators should take a boating safety jects, and other boats. course. This may be required in your state. Do not follow directly behind other boats or Many of the organizations listed in the next waterskiers.
Safety information location, but all are basically the same as the National Marine Manufacturers Associa- International Rules of the Road. The rules tion (NMMA) presented in the following section are con- 200 East Randolph Drive densed- and have been provided for your Suite 5100 convenience only.
Safety information vessel will be able to determine how best to any vessels shown in white area (you are the avoid you. Give-Way vessel). Any vessels in the shad- ed area must yield to you (they are the Give- Give-way vessel Way vessels).
Safety information you are the Give-Way vessel. If the other navigate such waters with your boat, you will 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.
Safety information black buoys to starboard. 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.
Read any manuals supplied with the boat. Read all labels on the outboard motor and the boat. If you need any additional information, contact your Yamaha dealer. EMU33831 Warning labels If these labels are damaged or missing, contact your Yamaha dealer for replacements. ZMU06306...
General information EMU35132 Electrical hazard Symbols The following symbols mean as follows. Notice/Warning ZMU05666 ZMU05696 Read Owner’s Manual ZMU05664 Hazard caused by continuous rotation ZMU05665...
Boat horsepower rating appropriate. EWM01560 Your Yamaha dealer can help you select the WARNING right propeller for your boating needs. Select Overpowering a boat can cause severe a propeller that will allow the engine to reach instability.
10% ethanol YAMALUBE 2-stroke outboard motor can cause fuel system damage or cause en- gine starting and running problems. Yamaha does not recommend gasohol containing If the recommended engine oil is not avail- methanol because it can cause fuel system able, another 2-stroke engine oil with an damage or engine performance problems.
Yamaha recommends the use of EMU36351 Emergency equipment Ring Free Fuel Additive, available from your Yamaha dealer. Ring Free Fuel Addi- Keep the following items onboard in case tive has repeatedly proven its ability to clean there is trouble with the motor.
Specifications and requirements engine for details. EMU30390 Approval label of emission control certif- icate This label is attached to the bottom cowling. Existing Technology; N/A ZMU02838 1. Manufactured date label location ZMU06311 1. Approval label location Manufactured: EMISSION CONTROL INFORMATION ENGINE FAMILY : ZMU04346 THIS ENGINE CONFORMS TO 2001 U.S.
5. Throttle friction adjuster If your model was equipped with a portable 6. Clamp screw fuel tank, its function is as follows. 7. Cooling water inlet 8. Anti-cavitation plate EWM00020 WARNING 9. Trim rod 10. Shallow water lever The fuel tank supplied with this engine is 11.
Components tions. ZMU02846 ZMU04499 EMU25922 Gear shift lever 1. Fuel tank cap Pulling the gear shift lever towards you puts 2. Fuel gauge the engine in forward gear so that the boat 3. Air vent screw moves ahead. Pushing the lever away from 4.
Components or throttle grip, which could result in an accident. [EWM00032] ZMU02848 EMU25961 ZMU02850 Throttle indicator The fuel consumption curve on the throttle When constant speed is desired, tighten the indicator shows the relative amount of fuel adjuster to maintain the desired throttle set- consumed for each throttle position.
Components EMU26070 Manual starter handle To start the engine, first gently pull the han- dle out until resistance is felt. From that posi- tion, then pull the handle straight out quickly to crank the engine. ZMU02851 1. Clip 2. Cord 3.
Components difficult to steer, which could result in an accident. EMU26261 Trim rod (tilt pin) The position of the trim rod determines the minimum trim angle of the outboard motor in relation to the transom. ZMU02855 ECM00660 NOTICE Do not use the tilt support lever or knob when trailering the boat.
Installation EMU26902 Installation The information presented in this section is intended as reference only. It is not possible to provide complete instructions for every possible boat and motor combination. Prop- er mounting depends in part on experience and the specific boat and motor combination. EWM01590 WARNING ZMU01760...
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...
Secure the clamp bracket to the transom using the bolts provided with the out- board (if packed). For details, consult your Yamaha dealer. WARNING! Avoid using bolts, nuts or washers other than those contained in the engine packaging. If used, they must be of at...
Operation EMU36381 plane, then immediately reduce the First-time operation throttle to 3000 r/min or less. EMU30174 Next two hours: Breaking in engine Accelerate at full throttle onto plane, Your new engine requires a period of break- then reduce engine speed to three-quar- in to allow mating surfaces of moving parts to ter throttle (approximately 4000 r/min).
Operation EMU37141 the outboard unsafe to operate. Fuel level EMU36451 Be sure you have plenty of fuel for your trip. Check for fuel leaks A good rule is to use 1/3 of your fuel to get to Check for fuel leaks or gasoline fumes in the destination, 1/3 to return, and to keep 1/ the boat.
After installing, check the fitting of the top Disconnect the fuel line from the fuel cowling by pushing it with both hands. If the tank and tighten the air vent screw on top cowling is loose, have it repaired by your the fuel tank cap. Yamaha dealer.
Operation ZMU04484 ZMU06621 Tighten the filler cap securely. 10. Wipe up any spilled gasoline immediate- ly with dry rags. Dispose rags properly according to local laws or regulations. EMU27406 Gasoline and oil mixing (100:1) ECM00811 NOTICE Avoid using any oil other than the spec- ified type.
Operation Shake the fuel tank to mix the fuel thor- oughly. 100:1 Make sure that the oil and gasoline are 12 L 14 L 24 L mixed. (0.26 US gal, (3.2 US gal, (3.7 US gal, (6.3 US gal, 0.22 Imp gal) 2.6 Imp gal) 3.1 Imp gal) 5.3 Imp gal)
Operation Symptoms include nausea, dizziness, TIP: and drowsiness. Keep cockpit and cab- Wipe up any spilled gasoline immediately in areas well ventilated. Avoid blocking with dry rags. Dispose rags properly accord- exhaust outlets. ing to local laws or regulations. Squeeze the primer pump, with the ar- If there is an air vent screw on the fuel row pointing up, until you feel it become tank cap, loosen it 2 or 3 turns.
Operation where it could become entangled, pre- (start) position. venting it from functioning. Avoid accidentally pulling the cord dur- ing normal operation. Loss of engine power means the loss of most steering control. Also, without engine power, the boat could slow rapidly. This could cause people and objects in the boat to be thrown forward.
4 or 5 tries, open the throttle a Check that no water leaks from the joints be- small amount (between 1/8 and 1/4) and tween the exhaust cover, cylinder head, and try again. Also if the engine is warm and body cylinder.
Operation shorten engine life. Gradually return the down position (if equipped) before oper- choke knob to its home position as the en- ating in reverse. gine warms up. EMU36530 Checks after engine warm-up EMU36540 Shifting While tightly moored, and without applying throttle, confirm that the engine shifts smoothly into forward and reverse, and back to neutral.
Operation EMU31742 Stopping boat EWM01510 WARNING Do not use the reverse function to slow down or stop the boat as it could cause you to lose control, be ejected, or im- pact the steering wheel or other parts of the boat. This could increase the risk of serious injury.
Operation EMU27862 Trimming outboard motor 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. This in- creases the possibility of an accident. If the boat begins to feel unstable or is hard to steer, slow down and/or readjust the trim angle.
Operation bow up, the boat may have a greater tenden- cy to steer to one side or the other. Compen- sate for this as you steer. When the bow of the boat is down, it is easier to accelerate from a standing start onto plane. ZMU02859 1.
Operation the bow is greatly increased, heightening the Otherwise fuel may leak. danger of “bow steering” and making opera- ECM00231 tion difficult and dangerous. NOTICE Before tilting the outboard motor, fol- low the procedure under “Stopping en- gine” in this chapter. Never tilt the outboard motor while the engine is run- ning.
Operation ZMU02887 Place the tilt lock lever (if equipped) in EMU28013 Procedure for tilting down (manual the release/up position. Pull up the shallow water lever (if tilt models) equipped). Slightly tilt the engine up. On models equipped with a tilt support knob, pull it out.
EMU28110 Cruising in muddy, turbid, or acidic water Procedure Yamaha strongly recommends that you use Place the gear shift lever in neutral. the optional chromium-plated water pump kit (see page 16) if you use the outboard motor in acidic water or water with a lot of sediment in it, such as muddy or turbid (cloudy) water.
Yamaha dealer sition using a motor support device such as prior to storage. However, you, the owner, a transom saver bar. Consult your Yamaha with a minimum of tools, can perform the fol- dealer for further details.
TIP: [EWM00091] Run the engine at a fast idle for 10–15 The use of “Yamaha Fuel Conditioner and minutes in neutral position. Stabilizer” eliminates the need to drain the Just prior to turning off the engine, quick- fuel system. Consult your Yamaha dealer or ly spray “Yamaha Stor-Rite Engine...
Areas with damaged paint are Seal replacement should be performed more likely to corrode. If necessary, clean by an authorized Yamaha dealer prior to and paint the areas. A touch-up paint is avail- use. able from your Yamaha dealer.
Yamaha marine dealership. A service manual is available for purchase through your Yamaha dealer for owners who have the mechanical skills, tools, and other equipment necessary to perform mainte- nance not covered by this owner’s manual.
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 20 hours Item...
Inspection or replace- Thermostat ment as necessary Water inlet Inspection Main switch/stop Inspection or replace- switch/choke switch ment as necessary Wire harness connec- Inspection or replace- tions/wire coupler con- ment as necessary nections Inspection and clean- (Yamaha) Fuel tank ing as necessary...
Maintenance EMU28932 Greasing Yamaha marine grease (Water resistant grease) ZMU02872 attempt to diagnose any problems yourself. EMU28956 Cleaning and adjusting spark plug Instead, take the outboard motor to a The spark plug is an important engine com- Yamaha dealer. You should periodically re- ponent and is easy to inspect.
For re- properly. Before fitting the spark plug, placement of the fuel filter, consult your measure the electrode gap with a wire Yamaha dealer. thickness gauge; replace it if out of spec- ification. ZMU02874...
For idle speed specifications, see page 13. If you have difficulty verify- ing the idle speed, or the idle speed re- quires adjustment, consult a Yamaha dealer or other qualified mechanic. EMU29113 Checking wiring and connectors...
Otherwise the EMU29287 propeller could come off during opera- Changing gear oil tion and be lost. EWM00800 WARNING Apply Yamaha marine grease or a cor- Be sure the outboard motor is securely...
Never get under the lower unit while it can cause gear damage. Consult a is tilted, even when the tilt support lever Yamaha dealer for repair of the lower or knob is locked. Severe injury could unit seals. [ECM00711]...
Remove the fuel tank from the boat be- Inspecting and replacing anode(s) fore cleaning it. Work only outdoors in Yamaha outboard motors are protected from an area with good ventilation. corrosion by sacrificial anodes. Inspect the Wipe up any spilled fuel immediately.
Maintenance anodes on equipped models. Consult a Yamaha dealer for inspection and replace- ment of internal anodes attached to the pow- er unit.
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-alert indicator is flash- Q. Are spark plug(s) fouled or of incorrect ing, 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.
Q. Is fuel system obstructed? Q. Is water pump or thermostat faulty? A. Check for pinched or kinked fuel line or A. Have serviced by a Yamaha dealer. other obstructions in fuel system. Q. Is there excess water in fuel filter cup? Q.
A. Tighten bolt. er), the engine can be started with an emer- gency starter rope. Q. Is steering pivot loose or damaged? EWM01022 A. Tighten or have serviced by a Yamaha WARNING dealer. Use this procedure only in an emergen- EMU29433...
Trouble Recovery could result in an accident. Attach the engine shut-off cord to a se- cure place on your clothing, or your arm or leg while operating the boat. Do not attach the cord to clothing that could tear loose. Do not route the cord where it could become entangled, pre- venting it from functioning.
EMU33501 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. NOTICE: Do not attempt to run the outboard motor until it has been com- pletely inspected.