Operation
motor greatly affects the water resistance. If
the mounting height is too high, cavitation
tends to occur, thus reducing the propulsion;
and if the propeller tips cut the air, the engine
speed will rise abnormally and cause the en-
gine to overheat. If the mounting height is too
low, the water resistance will increase and
thereby reduce engine efficiency. Mount the
outboard motor so that the anti-cavitation
plate is between the bottom of the boat and
a level 25 mm (1 in.) below it.
pitch considerably, mount the outboard
motor low enough so that the propeller will
not contact the water surface during mo-
tor-powered operation.
When sailing, the outboard motor should
be able to be tilted up out of the water so
the propeller does not contact the water
spray. Disconnect the fuel line.
Check that the outboard motor does not in-
terfere with the rudder.
Check that the engine can be easily start-
ed and stopped.
q
q
q
q
q
Check the ease of operating the gear shift
and throttle control.
If mounting the outboard motor on a well-
type boat, exhaust gases and blow-by gas
flow must be allowed to exit the boat. A
special kit designed for this purpose can
be ordered through your Yamaha dealer.
0–25mm
(0–1in.)
ZMU02011
NOTE:
q
The optimum mounting height of the out-
board motor is affected by the boat and
motor combination and the desired use.
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.
ZMU04376
EMU26970
Clamping the outboard motor
q
For instructions on setting the trim angle of
the outboard motor, see page 34.
1.
Place the outboard motor on the tran-
som so that it is positioned as close to
the center as possible. Tighten the tran-
som clamp screws evenly and securely.
Occasionally check the clamp screws
for tightness during operation of the out-
board motor because they could be-
EMU26960
Mounting height for sailboat
When mounting the outboard motor on the
motor bracket of a sailboat, check the follow-
ing points:
q
When using the outboard motor, the cavi-
tation plate should be 50 mm (2 in.) or
more below the water surface to prevent
propeller damage. Because a sailboat can
22
| Categories | Yamaha Outboard Manuals |
|---|---|
| Document Type | Boat Motor Manual Free Download. Marine Operator's Boating Guide. |
| Tags | Yamaha F9.9, Yamaha T9.9 |
| Model Year | 2007 |
| 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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