Nick Moore McCabe
New member
I have a 1986 40hp Yamaha on a boat I just purchased. Took it out today and am having some issues. There is a clicking/grinding sound when I put the engine in reverse, it does not seem to be engaging. I am thinking some sort of cable or linkage adjustment is needed. Forward engages fine, however, when I get to about 75% of full throttle, the engine starts to rev high and unloaded like something is slipping and the boat loses speed. If I back off the throttle, it will re-engage and act normal until I go past 75%. I have heard about a hub/prop issue being the cause of this. Does anyone have any advice on what is going on here. The motor has hardly been used and looks like it could be on the showroom floor. It runs perfectly so I am really hoping that I don't have to repower. Thanks in advance.