I have a howard shovel hydro. I currently have a 11 1/2 x 16 1/2 cleaver prop. My motor is pushing 550hp. 22* gears. I am having a problem idleing up to around 3k rpm the boat barely moves. I can stomp on the throttle and there is a delay almost like spinning tires off the line. Engine isnt bogging at all. I was recommended to get a 3 blade prop similar in size. What are you guys thoughts on this? I was told it would launch hard, and maintain my current speed that i run....
You may consider posting this up in the v-drive section. You'll likely get much more feedback.
For what it's worth, some slip is intentional and is expected... at least on flat bottom v-drives. I'm not certain about what to expect with a correctly set up hydro. It may (or may not) be perfectly normal behavior. Having previously only had experience with outboards and I/O's, I was a little surprised and thought something was wrong with my set-up when I initially drove my first v-drive.
IF you are at a total stand still... not moving, and mash the throttle, you should get some slip for a couple seconds.
IF you are already underway... say going 20 mph ish and mash it... you should not get any slip.
Propshaft angle is a huge deal.
I assume... this is an old boat (shovel nose, you said) and the prop is under the boat quite a bit....
SO.... if not outboard steering you do not want to kick the tail... duh. THIS MEANS you do not want more lift, just hook.
Check shaft angle.
Most guys... well, a lot run 17 pitch. Not a huge deal, but shaft angle and blade area are.