Adjusting Boat Trim - Yamaha F6C Owner's Manual

Operation
F2.5A
1
A
B
1. Trim rod
F4B, F5A, F6C
1
1. Trim rod
3. Change the position of the trim rod in di-
rection "A" to raise the bow ("trim-out").
Change the position of the trim rod in di-
rection "B" to lower the bow ("trim-in").
TIP:
The outboard motor trim angle changes ap-
proximately 4 degrees when the trim rod posi-
tion is changed by 1 hole.
4. Make test runs with the outboard motor
set at different trim angles to find the po-
sition that works best for your boat and
operating conditions.
61
ZMU07372
A
B
ZMU06755
EMU40121

Adjusting boat trim

Generally, a boat is stable when the keel line
of the boat is up about 3 to 5 degrees. With
the bow up, the boat may have a greater ten-
dency to steer to one side or the other. If this
occurs, adjust the trim angle.
Bow Up
Too much trim-out puts the bow of the boat
too high in the water. Excessive trim-out can
also cause the propeller to ventilate, which re-
duces performance further, and the boat may
"porpoise" (hop in the water), which could
throw the operator and passengers over-
board.
Bow Down
Too much trim-in causes the boat to "plow"
through the water, decreasing fuel economy
and making it hard to increase speed. Resis-
tance at the bow is greatly increased, height-
ening the danger of "bow steering" and
making operation difficult and dangerous.