Sorry for the late reply, I am in post surgery recovery and the boat has not been on the top of my list.
Originally the boat would get on the plane for up to 30 seconds, then it would just slowly sink back into the water. It would do this a few times before I would have to limp home with my tail between my legs.
I sent the carby away to be serviced and took most of the fuel out. Don't ask me how.
So the next time I took the boat out, it ran like it had never before. It wanted to go, but I kept it at 3000 revs with a smile on my face.
After 5 minutes it back fired and sat down in the water.
Same deal. I could get it on the plane for 30 seconds, before it wouldn't.
Limped back home with my tail between my legs again.
So while I have been recovering, I put some fuel doctor in that tank.
I am going to take it out this Sunday with an alternative fuel tank as well, to weather it's my tank.
Wish me luck, because I am tired of looking at it in my front yard.