Trim Angle Adjusting - SELVA MARINE Oyster 5 Owner's Manual

Trim angle adjusting

The trim angle is the inclination angle, that should be given to
the motor in order to obtain an optimal performance from your
boat.
An improper trim angle does not only affect the
performance of your boat, but can also cause loss of
control, which means danger for the people on
board.
While sailing the motor should be perpendicular to the
water surface, but the trim angle can be 3 degrees to
5 degrees.
If the trim angle is made too great, the buoyancy
centre of the boat will shift towards the stern. In this
condition, and if the stability moment at the bow is
large, the boat will tend to "porpoise". If the trim
angle is insufficient, the bow may "plough", making
the boat unstable.
When the boat is in stable trim it remains parallel to
the water.
To adjust the trim angle proceed as follows:
− close the safety valve of the fuel tank (for motors
with incorporated fuel tank );
− push down the free-lock lever and tilt up the motor ;
−
remove the adjusting-rod and reposition the rod in
the desired hole, which allows the appropriate trim
angle;
− unlock the tilt support bar and bring again the motor
in the vertical position, so that it leans on the
adjustment pin;
− set the free-lock lever to the lock position;
Improperly distributed load on boat or in different
positions, can alter the ideal trim conditions.
You must adjust the trim angle when the engine is
switched off.
Ensure the transom clamp screws are tightened
securely
14
Picture No. 37
Picture No. 38.