My motor will run at a max 3500 RPM with the cowling on.
My motor will run up to 4500 RPM with cowling off.
My boat will come out of the hole like a 25ft. boat with a 20hp on it with the cowling on. (NOT GOOD in other words)
My boat acts like a jet ski with the cowling off. (AWESOMELY FAST)
Can anyone suggest to me what's up with this?