Sometimes when I'm plaining theres a squilling noise. If I decelerate it stops and I may not here it again for awhile. This boat is a 88 glasstream 2.3 litre. I took it out for the 1st time today. Also while tinkering whith this boat at my house ,I never had any problems with it shifting into reverse. But today while in the water I had to pull very hard on throttle to get it to go. Then had to push very hard to get it to go back into forward. Once on shore I was able to shift fine again. Was wonder how to check the fluid for tilt? Theres a flat head screw middle ways but Im not sure.