E
EMU19160
Trim angle settings and boat handling
When the boat is on plane, a bow-up atti-
tude results in less drag, greater stability
and efficiency. 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 tendency to steer to one side
or the other. Compensate for this as you
steer. The trim tab can also be adjusted to
help offset this effect.
1
2
3
Optimum angle (level keel line)
Bow up
Bow down
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 drag. Excessive trim-out can also cause
the propeller to ventilate, which reduces per-
formance further, and the boat may “por-
poise” (hop in the water), which could throw
the operator and passengers overboard.
Bow Down
When the bow of the boat is down, it is eas-
ier to accelerate from a standing start onto
plane. Too much trim-in causes the boat to
“
plow” through the water, decreasing fuel
economy and making it hard to increase
speed. Operating with excessive trim-in at
higher speeds also makes the boat unstable.
Resistance at the bow is greatly increased,
heightening the danger of “bow steering” and
making operation difficult and dangerous.
NOTE:
@
Depending on the type of boat, the outboard
motor trim angle may have little effect on the
trim of the boat when operating.
@
3-23
| Categories | Yamaha Outboard Manuals |
|---|---|
| Document Type | Boat Motor Manual Free Download. Marine Operator's Boating Guide. |
| Tags | Yamaha F6C, Yamaha F8C, Yamaha T8C |
| Model Year | 2004 |
| 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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