MOST BOATS HANDLE BEST when running parallel with their at-rest waterline. Accordingly, outboards and sterndrives fea- ture a power trim adjustment that allows you to change the ngine’s angle of thrust by tilting it “out” or “in” in relation to the transom in order to maintain the proper running angle.
That adjust-on-the-fly capability is important because optimum trim position is determined
by load and water conditions, and will change as passengers move or seas vary. Experienced
boaters learn to adjust their trim even as their craft powers onto plane, tweaking their engine’s
Using the engine’s tilt function to properly trim a planing-hull boat while underway
increases stability, fuel efficiency, and safety BY DAN ARMITAGE
tilt angle to optimize their “hole shot” and
quickly reach peak efficiency. A properly
trimmed boat offers the most comfortable
ride and the most efficient running angle –
one that minimizes the amount of hull in the
water creating drag – and maximizes your
Trimming the angle of the engine’s thrust
too far down (drive in) will force the stern up
and cause the bow of the boat to drop. This is
called plowing and can cause what is known
PRACTICAL BOATER | BOATHANDLING
Trimming the engine in
(or down) will lift the stern,
pushing the bow down.
Trimming the engine out (or
up) will push the stern down,
lifting the bow up.
INBOARD ENGINE WITH STERNDRIVE