My boat is at the repair shop for the 4th or 5th time. Lost count. The boat is a 190 Bay with a 90hp 2cycle yamaha on it. It first went in for tune up and getting old gas out. That was successful. The boat however, began hesitating and you would have to back and pump the ball. Then it stalled and wouldn't start. Pumped the ball again and it started. Took it in again and this time the boat was only running at 2700 rpm. They then replaced the brain. I took it out for a test drive and it did not run well so they said my stainless steel prop was not the right pitch. They put a new prop on and it did run ok. The prop was tested and they said it was fine. Now they don't want to fix my speedometer because they feel like they tried everything and the tubing is very brittle and to do it right they would have to drop the lower unit. Also I noted the shift mechanism was very stiff and asked about that. The end result is they don't want to drop the lower unit and I am wondering from reading different articles if they suspect the problem is in the lower unit. My bill is at $1300.00 plus the new propeller. I don't understand that the prop that been on there for many years and been tested by a machine shop comes back fine. And I want an opinion if the possible reason for not wanting to drop the lower unit to fix the speedometer is because they suspect lower unit problems. What are your thoughts? Thank you I have spend on trailer rebuild and my boat to date approximately $5,000.00 to date and need some help.