Hi Dicko,
Seems to me that's a job for the expert, I had a similar situation not long ago, I thought I could fix the problem, after spending three days trying to fix it I gave up. I rang the expert , Huey, and bingo he fixed it in no time. And I was expecting a huge bill for it but no, as if I am a long lost friend, giving me all the discount he can give. My advise is take it to Huett Marine, they are the expert.
Littledinghy