Operation; First-Time Operation; Breaking In Engine; Getting To Know Your Boat - Yamaha 2D Owner's Manual

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First-time operation

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Breaking in engine

Your new engine requires a period of break-
in to allow mating surfaces of moving parts to
wear in evenly. Correct break-in will help en-
sure proper performance and longer engine
life. NOTICE: Failure to follow the break-in
procedure could result in reduced engine
life or even severe engine damage.
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Gasoline and engine oil mixing chart (25:1)
1. : Gasoline
2. : Engine oil
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NOTICE
Be sure to mix gasoline and oil completely,
otherwise the engine may be damaged.
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Procedure for pre-mixed models
Run the engine under load (in gear with a pro-
peller installed) for 10 hours as follows.
1. First 10 minutes:
Run the engine at the lowest possible
speed. A fast idle in neutral is best.
2. Next 50 minutes:
Do not exceed half throttle (approxi-
mately 3000 r/min). Vary engine speed
occasionally. If you have an easy-planing
boat, accelerate at full throttle onto
plane, then immediately reduce the
throttle to 3000 r/min or less.
3. Next two hours:
Accelerate at full throttle onto plane, then
reduce engine speed to three-quarter
throttle (approximately 4000 r/min). Vary
engine speed occasionally. Run at full
throttle for one minute, then allow about
10 minutes of operation at three-quarter
throttle or less to let the engine cool.
4. Remaining seven hours:
Run the engine at any speed. However,
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avoid operating at full throttle for more
than 5 minutes at a time.
5. After the first 10 hours:
Operate the engine normally. Use the
standard premix ratio of gasoline and oil.
For details on mixing fuel and oil, see
page 21.
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Getting to know your boat

All boats have unique handling characteris-
tics. Operate cautiously while you learn how
your boat handles under different conditions
and various trim angles (see page 27).
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Checks before starting engine

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WARNING
If any item in "Checks before starting en-
gine" is not working properly, have it in-
spected and repaired before operating the
outboard motor. Otherwise, an accident
could occur.
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NOTICE
Do not start the engine out of water. Over-
heating and serious engine damage can
occur.
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Fuel level

Be sure you have plenty of fuel for your trip. A
good rule is to use 1/3 of your fuel to get to
the destination, 1/3 to return, and to keep 1/3

Operation

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