Operation
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.
UP
DN
ZMU03835
To raise the bow (trim-out), press the switch
” (up).
To lower the bow (trim-in), press the switch
” (down).
“
“
Make test runs with the trim set to different
angles to find the position that works best for
your boat and operating conditions.
EMU27911
Adjusting boat trim
When the boat is on plane, a bow-up attitude
results in less drag, greater stability and effi- Bow Down
ciency. This is generally when the keel line of Too much trim-in causes the boat to “plow”
the boat is up about 3 to 5 degrees. With the through the water, decreasing fuel economy
bow up, the boat may have a greater tenden- and making it hard to increase speed. Oper-
cy to steer to one side or the other. Compen- ating with excessive trim-in at higher speeds
sate for this as you steer. The trim tab can also makes the boat unstable. Resistance at
also be adjusted to help offset this effect. the bow is greatly increased, heightening the
When the bow of the boat is down, it is easier danger of “bow steering” and making opera-
to accelerate from a standing start onto tion difficult and dangerous.
plane.
NOTE:
Depending on the type of boat, the outboard
37
| Categories | Yamaha Outboard Manuals |
|---|---|
| Document Type | Boat Motor Manual Free Download. Marine Operator's Boating Guide. |
| Tags | Yamaha 70 |
| Model Year | 2006 |
| 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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