Specifications and requirements

load. Generally, chose a larger pitch propeller for a smaller operating load and a smaller pitch propeller for a heavier load. If you carry loads that vary widely, chose the propeller that lets the engine run in the proper range for your maximum load but remember that you may need to reduce your throttle setting to stay within the recommended engine speed range when carrying lighter loads.

For instructions on propeller removal and in- stallation, see page 49.

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ZMU04606

1.Propeller diameter in inches

2.Propeller pitch in inches

3.Type of propeller (propeller mark)

EMU25770

Start-in-gear protection

Yamaha outboard motors or Yamaha-approved 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 before starting the engine.

EMU25651

Engine oil requirements

Recommended engine oil: YAMALUBE 2-stroke outboard motor oil

If the recommended engine oil is not avail- able, another 2-stroke engine oil with an NMMA-certified TC-W3 rating may be used.

EMU36360

Fuel requirements

EMU36781

Gasoline

Use a good quality gasoline that meets the minimum octane rating. If knocking or pinging occurs, use a different brand of gasoline or premium unleaded fuel. Yamaha recomends that you use alcohol-free (see Gasohol) gasoline whenever possible.

Recommended gasoline:

Regular unleaded gasoline with a minimum Octane rating of 86 (Pump Octane Number) = (R+M)/2

ECM01981

NOTICE

●Do not use leaded gasoline. Leaded gas- oline can seriously damage the engine.

●Avoid getting water and contaminants in the fuel tank. Contaminated fuel can cause poor performance or engine dam- age. Use only fresh gasoline that has been stored in clean containers.

Gasohol

There are two types of gasohol: gasohol containing ethanol (E10) and that containing methanol. Ethanol can be used if the ethanol content does not exceed 10% and the fuel meets the minimum octane ratings. E85 is a fuel containing 85% ethanol and must not be used in your outboard motor. All ethanol blends containing more than 10% ethanol can cause fuel system damage or cause engine starting and running problems. Yamaha does not recommend gasohol containing methanol because it can cause fuel system damage or engine performance problems.

It is recommended that you install a water- separating marine fuel filter assembly (10 micron minimum) between your boat’s fuel tank and outboard motor when using ethanol. Eth-

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