I have a 22' Century Cutty With A 260 Mercruiser. I bought it three years ago with 210 Hours on the power train. That being said, whenever I had more than 2 people in the boat, it had a major problem getting up on plane If at all. When I bought the boat the last owner told me the water temp gauge was not working (on cold at all times). No biggie. I would always eyeball over the stern making sure it was pumping ( throwing water over the swim platform at idle) I put on a steeper pitch prop thinking I would lose High end speed but, could plane at a lower speed. NO help It just slowed the boat down by about 8 MPH. Power up with four people, Trim tabs full down, I would have to send 2 people forward into the cabin to get up on plane. Then this past winter the light bulb went on. Change the damn thermostat. Put on the original prop, got it up to temp 140*. and it jumped on plane what a difference a thermostat makes. Moral of my story believe what I see and not as much what I hear.
