Operation
motor greatly affects the water resistance. If
the mounting height is too high, cavitation
tends to occur, thus reducing the propulsion;
come loose due to engine vibration.
EWM00640
WARNING
and if the propeller tips cut the air, the engine Loose clamp screws could allow the out-
speed will rise abnormally and cause the en- board motor to fall off or move on the
gine to overheat. If the mounting height is too transom. This could cause loss of control
low, the water resistance will increase and and serious injury. Make sure the tran-
thereby reduce engine efficiency. Mount the som screws are tightened securely. Oc-
outboard motor so that the anti-cavitation casionally check the screws for tightness
plate is between the bottom of the boat and during operation.
a level 25 mm (1 in.) below it.
0–25mm
(0–1in.)
ZMU02012
ZMU02011
2.
If the engine restraint cable attachment
is equipped on your engine, an engine
restraint cable or chain should be used.
Attach one end to the engine restraint
cable attachment and the other to a se-
cure mounting point on the boat. Other-
wise the engine could be completely lost
if it accidentally falls off the transom.
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.
q
For instructions on setting the trim angle of
the outboard motor, see page 27.
EMU26970
Clamping the outboard motor
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-
ZMU02013
3.
Secure the clamp bracket to the transom
using the bolts provided with the out-
18
| Categories | Yamaha Outboard Manuals |
|---|---|
| Document Type | Boat Motor Manual Free Download. Marine Operator's Boating Guide. |
| Tags | Yamaha 25D |
| 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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