Operation
cy to steer to one side or the other. Compen- the bow is greatly increased, heightening the
sate for this as you steer. The trim tab can danger of “bow steering” and making opera-
also be adjusted to help offset this effect. tion difficult and dangerous.
When the bow of the boat is down, it is easier
to accelerate from a standing start onto plane.
TIP:
Depending on the type of boat, the outboard
motor trim angle may have little effect on the
trim of the boat when operating.
Bow Up
Too much trim-out puts the bow of the boat
too high in the water. Performance and econ-
omy are decreased because the hull of the
EMU27934
Tilting up and down
boat is pushing the water and there is more air If the engine will be stopped for some time or
drag. Excessive trim-out can also cause the if the boat is moored in shallows, the outboard
propeller to ventilate, which reduces perfor- motor should be tilted up to protect the propel-
mance further, and the boat may “porpoise” ler and lower casing from damage by collision
(hop in the water), which could throw the op- with obstructions, and also to reduce salt cor-
erator and passengers overboard.
rosion.
EWM00221
WARNING
Be sure all people are clear of the out-
board motor when tilting up and down,
Body parts can be crushed between the
motor and the clamp bracket when the mo-
tor is trimmed or tilted.
EWM00250
WARNING
Leaking fuel is a fire hazard. If there is a
fuel joint on the outboard motor, discon-
nect the fuel line or close the fuel cock if
the engine will be tilted for more than a few
minutes. Otherwise fuel may leak.
Bow Down
Too much trim-in causes the boat to “plow”
through the water, decreasing fuel economy
and making it hard to increase speed. Operat-
ing with excessive trim-in at higher speeds
also makes the boat unstable. Resistance at
37
| Categories | Yamaha Outboard Manuals |
|---|---|
| Document Type | Boat Motor Manual Free Download. Marine Operator's Boating Guide. |
| Tags | Yamaha 15, Yamaha 9 |
| Model Year | 2008 |
| 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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