Which prop?

[papajoe]

Hi all, I'm after a new prop fory 30hp mariner (698) how do I workout what size and pitch I need? Cheers joe

[paintman]

Starting point would be to run at Wide Open Throttle with your current prop & see what the revs are & whether that falls within the WOT band recommended by the engine maker.
After that its a case of deciding what you're after performance wise.

[Max...]

Some links in this other prop topic might be of help.

http://www.rib.net/forum/f50/y-class...tml#post683350

[papajoe]

cheers guys, I assume I need a rev counter. WOT sounds good, I'd like a little more top end : )

[Max...]

Originally Posted by papajoe

cheers guys, I assume I need a rev counter. WOT sounds good, I'd like a little more top end : )

Tinytach clone off eBay, £10 or so from China direct or a little more from UK re-sellers.