Operation
3.
Reposition the rod in the desired hole.
To raise the bow (“trim-out”), move the rod
away from the transom.
To lower the bow (“trim-in”), move the rod to-
ward the transom.
Make test runs with the trim set to different an-
gles to find the position that works best for
your boat and operating conditions.
EWM00400
WARNING
q
q
q
Stop the engine before adjusting the
trim angle.
Use care to avoid being pinched when
removing or installing the rod.
Use caution when trying a trim position
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
boat is pushing the water and there is more air
for the first time. Increase speed gradu- drag. Excessive trim-out can also cause the
ally and watch for any signs of instability propeller to ventilate, which reduces perfor-
or control problems. Improper trim an- mance further, and the boat may “porpoise”
gle can cause loss of control.
(hop in the water), which could throw the op-
erator and passengers overboard.
NOTE:
The outboard motor trim angle can be
changed approximately 4 degrees by shifting
the trim rod one hole.
EMU27911
Adjusting boat trim
When the boat is on plane, a bow-up attitude
results in less drag, greater stability and effi-
ciency. This is generally when the keel line of
the boat is up about 3 to 5 degrees. With the
bow up, the boat may have a greater tenden-
Bow Down
cy to steer to one side or the other. Compen- Too much trim-in causes the boat to “plow”
sate for this as you steer. The trim tab can through the water, decreasing fuel economy
also be adjusted to help offset this effect. and making it hard to increase speed. Operat-
When the bow of the boat is down, it is easier ing with excessive trim-in at higher speeds
to accelerate from a standing start onto plane. also makes the boat unstable. Resistance at
the bow is greatly increased, heightening the
danger of “bow steering” and making opera-
tion difficult and dangerous.
27
| Categories | Yamaha Outboard Manuals |
|---|---|
| Document Type | Boat Motor Manual Free Download. Marine Operator's Boating Guide. |
| Tags | Yamaha 15D, Yamaha 9.9D |
| 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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