75/90/115 OPTIMAX
Page 18 of 18
Trim-In Stop Adjustment
Some outboard boats, particularly some bass boats, are built with a greater than normal
transom angle which will allow the outboard to be trimmed further “in” or “under”. This great-
er trim “under” capability is desirable to improve acceleration, reduce the angle and time
spend in a bow high boat attitude during planing off, and in some cases, may be necessary
to plane off a boat with aft live wells, given the variety of available propellers and height
range of engine installations.
However, once on plane, the engine should be trimmed to a more intermediate position to
avoid a bow-down planing condition called “plowing”. Plowing can cause “bow steering” or
“over steering” and inefficiently consumes horsepower. In this condition, if attempting a turn
or encountering a diagonal, moderate wake, a more abrupt turn than intended may result.
In rare circumstances, the owner may decide to limit the trim under. This can be accom-
plished by purchasing a stainless steel tilt pin (P/N 17-49930A1) and inserting it through
whatever pin hole is desired. The non-stainless steel shipping bolt should not be used in this
application other than on a temporary basis.
WARNING
Avoid possible serious injury or death. Adjust outboard to an intermediate trim po-
sition as soon as boat is on plane to avoid possible ejection due to boat spin-out.
Do not attempt to turn boat when engine is trimmed extremely under or in.
a
a -
Tilt Pin