Whatever you do, get proffesional advice before you do anything. I bought a used split bowl a while back, made my boat drive like shit. I did not know that the bowl was the problem cause i changed the bowl and diverter at the same time. I blamed the diverter till i sent it back to where i bought it from. HTP told me the bowl had been modified by someone who obviously did not know what they were doing. I bought a new bowl and it fixed my problem.