I have a 1999 Malibu Response which had a pretty substantial leak last season. By substantial I mean that the bilge was in constant operation. When I looked under the boat for the source of the leak I saw that there were some sizable cracks around the rudder. So I asked around the area for a reputable boat fiberglass repair shop and dropped the boat off. I picked the boat up about a week later and everything looked great.
However...I dropped the boat in my pond last weekend for a couple of sets with my girlfriend and noticed that the boat, when operating at 34-36 mph tends to "slide". As I'm driving down the course the back end will slip out, I'll over steer to correct, and it will slip out again. This will happen about three times during the length of the course. It drives fine at trick speeds but it keeps you on your toes when driving slalom. I'm hoping that someone has experienced something like this before because I really don't want to turn into a dedicated tricker.
When I pulled the boat out I checked the rudder hoping that it was loose and it would be an easy fix. No such luck.
My new theory, as I sit here at work, is that when I get up to slalom speed the new glass is putting air to the prop and the cup of the prop is pulling it one direction. However I'm not totally sure if I remember it only sliding in one direction. I had a constant "oh shit" look on my face all the way down the course.
Any remedies, theories, or black magic would be greatly appreciated.