Normal
To the OP.....What you may need to do is redistribute the weight in your boat or at least keep this in mind when you make your changes to the trim angle of your engine. A boat that is loaded towards the stern typically needs more negative trim to get on plane. Moving the weight forward allows you to trim the engine out more. Also, with each trim angle change you should be able to change the trim tab angle a bit.
To the OP.....
What you may need to do is redistribute the weight in your boat or at least keep this in mind when you make your changes to the trim angle of your engine. A boat that is loaded towards the stern typically needs more negative trim to get on plane. Moving the weight forward allows you to trim the engine out more.
Also, with each trim angle change you should be able to change the trim tab angle a bit.