I was out on Thursday last week and we were cruising across the lake WOT and all of a sudden it sounded like the motor went into neutral and the motor revved up. I cut the throttle to idle position and took off again then ran fine back to the landing. The next day I went out and trolled around for a while then tried to take off to a different part of the lake, at about 40% the same thing happened, shut it down tried again with the same results. This is the closest post I have seen to my issue however, reverse and up to 40% motor runs fine, above that engine revs but there is no go power. In the garage I can put the engine in reverse and manually turn the prop both ways and sounds like there is compression happening in the engine so the drive works fine, in forward there is compression turning the prop in the incorrect direction, and easy turning clicking sound going the direction the prop is supposed to be going. Any thoughts or processes would be appreciated very much