Prop help for a 38 zr
#1
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Prop help for a 38 zr
I have a 38 zr with staggered 525's currently running 34 pitch 5 blade labbed props. Was out this weekend and was hitting the rev limits at about 80 mph. I know the boat has more than that. Any suggestions?
#8
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It sounds to me like you are way over propped and are over trimming it to get the RPM up. The trim on a ZR should be at 2 to 3 max. anything over and you are over trimming it. I would bet dollars to donuts those are the wrong props for the boat.
#10
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I assume 525's came with XR drives, and they don't come in 1.65's that I know of. I think the lowest and standard is 1.5
My opinion is to do the math (i.e., get your ratio and figure out where you think you should be) then try some props.
Like Tom said the step bottom boats don't like trim like flat bottom boats do. I was on my limiters because my props were too small but now I'm doing well with bigger wheels but still pretty well neutral on the trim.
With big cruising wheels I can get to nearly the same speed by trimming out. So the prior owner might have put bigger ones on to max out cruising speed.
My opinion is to do the math (i.e., get your ratio and figure out where you think you should be) then try some props.
Like Tom said the step bottom boats don't like trim like flat bottom boats do. I was on my limiters because my props were too small but now I'm doing well with bigger wheels but still pretty well neutral on the trim.
With big cruising wheels I can get to nearly the same speed by trimming out. So the prior owner might have put bigger ones on to max out cruising speed.