Budman
I have had the same problem. If I run as hard as she will go with the place diverter up then start to point the diverter down still full throttle I get a kick to the left, or right in your case. Does this sound right so far?? I don't know the cause of this however for saftey reasons I back off the rpm to 3000 then put the diverter down to a good balance point then full on. After my buddy Dan AKA Squirtcha and I pulled the motor and pump, he descovered the intake epoxyed to he hull was about a half inch off to the left go figure.