3 blade vs 4 blade prop
#1
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3 blade vs 4 blade prop
so this may be a dumb question but I have a 3 blade 25p prop what would I gain if I went to a 4 blade 25p prop. someone was trying to sell one for $300 on CL.
#2
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More transom lift. But more is not always better. It depends on the application. Need more info. If your boat came w a 3bl, I'd prob. stay w that. The manufacture ususlly spends lots of money on research on what works best. One of the pros on OSO will chime in w more info.
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You will lose about 300-400 rpm at WOT with the same pitch. That can be fixed by getting them labbed. You will most likely have better cruise speed.....less prop slip. May loose a little at top end. I went from 4 blade to 5 blade. Had 28% slip at cruise with 4 blade. Had 13% slip at cruise with 5 blade Maxximus props. Since I spend 99% of my time cruising, I like more blades myself. Better gas milage.
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You will lose about 300-400 rpm at WOT with the same pitch. That can be fixed by getting them labbed. You will most likely have better cruise speed.....less prop slip. May loose a little at top end. I went from 4 blade to 5 blade. Had 28% slip at cruise with 4 blade. Had 13% slip at cruise with 5 blade Maxximus props. Since I spend 99% of my time cruising, I like more blades myself. Better gas milage.
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Where do you live in STL and were do you boat at?
#7
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I wish I would have called BBlades.
I think they have a demo program or something.
I think I lost some top end, but I can't confirm.
By the way, the 5 Blade Maximus will create a lot of stern lift and the only weigh to change that is by getting them labbed, which I think creates SLIP.
Last edited by UrbanDisturbance; 08-27-2010 at 06:54 AM.
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Urban, you gain 1000 RPM just by labbing the props? Doesnt sound right. Usually gain 2 to 400 RPM when labbed properly. Sounds like your just slipping. I would call Brett ar BBlades......
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Thanks for the info I think I am going to stay away from the 4 blade I don’t do a lot of tubing or skiing right now b/c my kids are still to young and I don’t want to lose any of my top end speed. JeffswavI live in Wentzville, I do all of my boating at the Lake of the Ozarks.
Last edited by nbishop57; 08-27-2010 at 01:54 PM.
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They changed the Maximus pitch from 28 to 25-26. The first time around, it slipped at 28% at cruise. They added more cup and now it is at 22% slip at cruise. I need to test my WOT to see if I need anymore cup. I sure miss my 13% slip at cruise that I had before it was labbed. My plan is to test my props at WOT this Saturday.