need some trim advice

[BOWMAKER1]

I have an older Bass Tracker 17 that we just got back in the water after a long time. We have some issues with the tilt and trim on the Johnson 50 HP motor and are just trying to get by until we can adress that over the winter. Since I can raise the motor with the trim what hole should I have the pin for that in. Currently it is in the second hole out from the transom and the boat won't come up on plane before the prop starts to cavatate. If we move the pin to the third or fourth hole out will that help it to plane even though I understand that it will effect the Hole Shot, I am not really concerned about that as long as I can get on plane with out the caveatting. This is the same setup that did great several years ago so what can I do in the short term?

 

[BonairII]

Re: need some trim advice

Is your motor the correct length for your transom? I believe that your ventilation plate should be even or maybe an inch lower than your keel (not sure though).

Is your boat loaded evenly? You might want to try getting some weight farther forward. The closer the motor leg is toward the transom the more it will/should push the bow down. If your motor is too long for your transom, it will cause quite a bit of extra drag and slow you down.

 

[5150abf]

Re: need some trim advice

Without trim it is a compromise, it will run good at one speed but nowhere else, all you can do is try all the holes till you find one that works best where you want to run.

What I don't understand is why it will cavitate at the second hole but not the 3rd or 4th, normally the farther you trim the sooner it blows out, is your prop in good shape with no jagged edges, that will cause it to cavitate.

 

[Sea Rider]

Re: need some trim advice

Ideal is to have engine at a 90? angle and anticav plate parallel to sea surface when on plane with a well balanced boat, if engine is cavitating in choppy seas or at tight turns, must lower engine a bit.

Happy Boating