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revolution 4 props

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Old 05-27-2003, 06:45 PM
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Default revolution 4 props

with all 4bbl upgrade on my 4.3 i am now turning 5200 rpms with a 3 blade ss prop pitch is 19. I was thinking of trying a 21' revolution 4 mercruiser says they are great for v6 boats. but I have heard that you need to be turning alot of horsepower to turn a 4 blade prop well. what do you guys think or hopefully some one has tried one of these props on a v6.
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Old 05-27-2003, 07:24 PM
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Ric232
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Going from a 19P to a 21P 3-blade will cause you to drop to 4800rpm. Going to a Rev 4 21P will cause you to lose another 200-300. You may want to consider a 19P Rev 4.
 
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Old 05-27-2003, 07:43 PM
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according to mercury you can use the sme pitch it will not drop rpm's much.
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Old 05-27-2003, 07:54 PM
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Ric232
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Quote:
Originally posted by mikev
according to mercury you can use the sme pitch it will not drop rpm's much.
Yes, that's a rule of thumb. Experience specifically with the Rev 4 in most applications has yielded a 200-300 rpm drop with the same pitch. If you want to make sure you keep the same rpm's, try an Offshore (don't worry that Mercury says it's for outboards).

Last edited by Ric232; 05-27-2003 at 09:18 PM.
 
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Old 05-27-2003, 09:08 PM
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yep/Darin
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Old 05-27-2003, 09:36 PM
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I lost 300 rpm going from a 19 3 blade to a Rev4. But i picked up 2-3 mph
 
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