Yamaha 115D Owner's Manual download pdf (Page 40)

Operation

35

Adjust the outboard motor trim angle using

the power trim and tilt switch.

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.

NOTE:

To adjust the trim angle while the boat is

moving, use the power trim and tilt switch lo-

cated on the remote control device or tiller

handle, if equipped.

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-

cy to steer to one side or the other. Compen-

sate for this as you steer. The trim tab can

also be adjusted to help offset this effect.

When the bow of the boat is down, it is easier

to accelerate from a standing start onto

plane.

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.

1. Power trim and tilt switch

1. Power trim and tilt switch

UP

DN

ZMU03522

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