Last spring I hit a log on Cumberland. Delta prop of Cincinnati fixed the prop. I could then only hit 4600 rpm on a GXi-dp(496 ho) Delta checked the prop again, it checked out good, gotta believe the issue is other than the prop. As far as checking WOT, I was able to check the front linkage but didn't have the right tool to get the engine shroud off to see the rear. Other than the linkage.....any ideas? ps- was able to hit 5200 before all this. thanks, tim.