I am new to power boating and had a question about trimming the
outdrive. The boat seems to get up on plane faster when trimmed all the
way down and the steering is good once up on plane. My problem is when
I try to trim up the boat wants to go left and it is a struggle to keep
the boat going in a straight line. I assume this is due to the rotation
of the prop and the fact that the outdrive is less efficient at steering
when it is raised slightly up. Is that correct ? What is the goal of
trimming? Should I trim up until the steering begins to get stiff
turning to the right??

Help !!!

Thanks in advance.