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Well I put a jackplate on and now I think I'm experiencing prop blow out (cavitation) 
ok heres the deal, the whole reason I built my jack plate was because I didn't feel I was running shallow enough and even when on plane the cavitation plate was still a few inches below the surface even without a loaded boat. With the plate installed at it's lowest setting I am sitting about 2 inches above where I was and set back is about 4.5 inches. I also have a SE200 hydrofoil on my motor (2009 yamaha 20hp 4-stroke)
When I was testing it in the lake I first started with the second to lowest setting which gave me about 3 inches of lift. As I got on plane and speed increased it started feeling like the motor was choking, or someone was tapping the brakes, I tried adjusting the trim setting and it was best when the motor was at a negative angle (hole closest to the boat) but still not perfect. I went back with the JP now adjusted to the lowest setting, 2 or so, and it was a little better, but still very much there.
I decided to take the SE200 off and see what happened. The blow out seemed slightly less, but it was harder to get on plane and stay there and I had some porposing. When I look back as I'm on plane now I can see the top of the SE200 slightly out of the water.
So any suggestions? My thoughts are first trying to redrill the JP, I think I can get maybe another .75" lower. The only other thing I can think of is maybe a new prop. Any suggestions there?
I think if I were running loaded down with buddies, ice, and full livewell then this would be less of an issue, but I fish alone alot too, so.......
ok heres the deal, the whole reason I built my jack plate was because I didn't feel I was running shallow enough and even when on plane the cavitation plate was still a few inches below the surface even without a loaded boat. With the plate installed at it's lowest setting I am sitting about 2 inches above where I was and set back is about 4.5 inches. I also have a SE200 hydrofoil on my motor (2009 yamaha 20hp 4-stroke)
When I was testing it in the lake I first started with the second to lowest setting which gave me about 3 inches of lift. As I got on plane and speed increased it started feeling like the motor was choking, or someone was tapping the brakes, I tried adjusting the trim setting and it was best when the motor was at a negative angle (hole closest to the boat) but still not perfect. I went back with the JP now adjusted to the lowest setting, 2 or so, and it was a little better, but still very much there.
I decided to take the SE200 off and see what happened. The blow out seemed slightly less, but it was harder to get on plane and stay there and I had some porposing. When I look back as I'm on plane now I can see the top of the SE200 slightly out of the water.
So any suggestions? My thoughts are first trying to redrill the JP, I think I can get maybe another .75" lower. The only other thing I can think of is maybe a new prop. Any suggestions there?
I think if I were running loaded down with buddies, ice, and full livewell then this would be less of an issue, but I fish alone alot too, so.......