15
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:
push down the free-lock lever and tilt up the motor till the
first automatic stop;
lock the motor in the tilted up position, pushing down the
tilt-up lever;
remove the adjusting-rod and reposition it in the hole,
which allow the appropriate trim angle;
slightly tilt up the motor, unlock the tilt up lever, pushing it
upwards and bring the motor back to 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.
Picture No. 38
Ensure the transom clamp screws are tightened securely.
Picture No. 39.
