Operation
motor greatly affects the water resistance. If
the mounting height is too high, cavitation
tends to occur, thus reducing the propulsion;
life.
ECM00140
CAUTION:
and if the propeller tips cut the air, the engine q Failure to follow the break-in procedure
speed will rise abnormally and cause the en-
gine to overheat. If the mounting height is too
could result in reduced engine life or
even severe engine damage.
low, the water resistance will increase and q Premix fuel must be used during break-
thereby reduce engine efficiency. Mount the
outboard motor so that the anti-cavitation
plate is in alignment with the bottom of the
boat.
in in addition to oil in the oil injection
system.
EMU27060
Gasoline and engine oil mixing chart
(50:1)
ZMU01762
1.
2.
: Gasoline
: Engine oil
NOTE:
q
The optimum mounting height of the out-
board motor is affected by the boat/motor
combination and the desired use. Test
ECM00150
CAUTION:
runs at different heights can help deter- Be sure to mix gasoline and oil complete-
mine the optimum mounting height. Con- ly, otherwise the engine may be dam-
sult
your
Yamaha
dealer
or
boat
aged.
manufacturer for further information on de-
termining the proper mounting height.
For instructions on setting the trim angle of Run the engine under load (in gear with a
the outboard motor, see page 30.
EMU30310
Procedure for oil injection models
q
propeller installed) as follows.
1.
2.
First 10 minutes:
EMU27020
Breaking in engine
Run the engine at the lowest possible
speed. A fast idle in neutral is best.
Next 50 minutes:
Do not exceed half throttle (approxi-
mately 3000 r/min). Vary engine speed
occasionally. If you have an easy-plan-
ing boat, accelerate at full throttle onto
plane, then immediately reduce the
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
22
| Categories | Yamaha Outboard Manuals |
|---|---|
| Document Type | Boat Motor Manual Free Download. Marine Operator's Boating Guide. |
| Tags | Yamaha 90D |
| Model Year | 2005 |
| Download File |
|
| Language | English |
| Product Brand | Yamaha Motor. Yamaha Motor Corporation, USA - Support Customer Relations for US: 1-800-962-7926
Yamaha Boats: 1-800-962-7926 Yamaha Outboard Customer Relations: 1-866-894-1626 , Yamaha Outboard |
| Document File Type | |
| Publisher | yamaha-motor.com |
| Wikipedia's Page | Yamaha Motor Company |
| Copyright | Attribution Non-commercial |
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