I have a 1992 nitro bass boat 18ft with a 1988 mercury 150 HP with a power tech 23 pitch prop I got used a month ago when I try to plane out my motor has to be all the way down like where the motor upper cowling like in a 45 degree angle when I hammer on it my throttle is all the way full and it...
LaserII 48 16992 a40 its diameter 13 1/2 its on my 150 HP mercury not sure if that's big enough there is a gap between my prop and gear case about a half inch just got the boat and top speed at 6000 rpm is 45 that's off my GPS and I'm thinking it should be going at least 55
here is a list that i have done to try to fix it
changed empeller 2 months ago
changed tsats
when i drive around for about two or three hours the overheat alarm comes on and to get it to stop you have to fast idle for a minitue or so unpluged the overheat sensor when it goes off noe...
