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Old 25 August 2009, 09:00   #1
JSP
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25" prop

All this prop business is still a bit of a mystery to me.
Out of interest what would a 25" pitch do for or to my engine?
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Old 25 August 2009, 09:09   #2
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Mate has got a 21” Stainless prop on his 125hp hung on the blunt end of his 5.4 and it goes plenty well enough. But 21” is a big prop on a relatively big motor pushing a relatively small rib. I would think 25” is a big step up on that with a smaller motor.

What size are you running just now?
what revs you pulling WOT?
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Old 25 August 2009, 09:11   #3
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I've got a 19" stainless but it seems to slip allot. Specially in a tight turn.
I've never checked the Rev's, keep meaning to do it but on my present console I would have to bend down to knee level to read it.
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Old 25 August 2009, 09:16   #4
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Possibly mounted too high? A 4 blade would give more grip.
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Old 25 August 2009, 09:19   #5
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Don't think I could mount it any lower with out cutting the transom.
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Old 25 August 2009, 09:47   #6
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Cavitation in a tight turn might be down to too much power been on.
I take it you mean 21" pitch?
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Old 25 August 2009, 10:27   #7
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Quote:
Originally Posted by chewy View Post
Cavitation in a tight turn might be down to too much power been on.
I take it you mean 21" pitch?
Tried a few things, triming in all the way, less power. It's not a huge problem but I'd like to sort it.
Hoping to get a 21" soon to try out but this is on ebay
http://cgi.ebay.co.uk/1x-yamaha-pro-...d=p3286.c0.m14
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Old 25 August 2009, 10:30   #8
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You need to find out what rpm you reach with your current setup before spending any spondoolicks.
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Old 25 August 2009, 10:32   #9
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I know, off out on Friday so will check it out as my brother can watch the revs. Can't wait to get this new console in and have it set up right.
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