Are you smelling anything like burnt rubber in the engine room?Thank you for the responses. I May not describing it correctly. When this is happening the boat does not pick up speed. It hits 12-15mph and the rpm is at or close to 2500 and stays there as you accelerate further. Then a rumbling sound begins.
I will however visually check that the drives are down and pray that is the issue.
Are you smelling anything like burnt rubber in the engine room?