25" prop

[JSP]

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?

[mdt]

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?

[JSP]

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.

[codprawn]

Possibly mounted too high? A 4 blade would give more grip.

[JSP]

Don't think I could mount it any lower with out cutting the transom.

[chewy]

Cavitation in a tight turn might be down to too much power been on.
I take it you mean 21" pitch?

[JSP]

Originally Posted by chewy

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

[chewy]

You need to find out what rpm you reach with your current setup before spending any spondoolicks.

[JSP]

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.