Classic SeaCraft Community - 4 and 5 blade props?

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- - 4 and 5 blade props? (http://www.classicseacraft.com/community/showthread.php?t=25038)

I have a Solas Amita4 on a Yamaha F100 13 x 15" pitch. I get great holeshot, 33MPH top end.Even when dragging a hydroshield under the boat, and a kicker.

Your boat is smaller and has a bit more power, and a bit lighter but quite similar. You might try that or the 17" pitch model. Depends on the gearcase ratio on your boat. I bet you could get 35-37 MPH with that setup with a regular anti-cavitation mounted fin.

The Solas Amita 4 props were ~$109 at boats.net for aluminum ones last year. Cheap enough to try, get close, and have as a spare if you want to get a stainless one later.

Quote:

Originally Posted by sidelock (Post 212084)

Don't mean to hijack this thread but there seems to be so much knowledge & experience on props in this thread that I just could'nt help but to ask. What prop would you all recommand for an 18SF with a 1998 Yamaha 115 four cylinder two stroke ? I don't know what size prop is on it presently & the boat is in storage but I do know that the blades were ground down when I bought the boat. Someone told me they were ground down because they were too big & would hit .

Also, is there any interest in NiBrAl (bronze) props for Mercury O/Bs? I know someone who is considering production of some fully CNCed ones. They come out of the machine needing no balancing :) Said he picked up 4 MPH on a bass boat. I can't say much more, but I want to check back with them and see if they are going to start production.

I put a Solas Amita 4 13.75X19 on my 20SF/Suzuki DF140 and couldn't be happier. Good hole shot, minimum planing at 12mph, cruise at 28mph, and top end 41mph. And what porpoising issues I had due having a heavy motor on a bracket has virtually gone away (only when I trim the motor way up, but no need for trim tabs to stop porpoising).

Lloyd

I use a Solas 4 blade 17P on my 23' w/Hermco bracket, single Yam 250 2s OX66. As mentioned above; lower planing speed when rough was my main goal.

thank you Sir,
all good info, the Dania marine flea market is coming up soon so i will definetly be on the lookout for a new prop. i wish i could make the gathering this year to test a few props and meet some members but were going to Marco island this year around the same time.

Down wind, I can get 50 mph at 5800 rpm with my merc revolution 4 blade 19pitch, F250 yamaha, I cant imagine i would get much faster with a 3 blade.

Previous motor was a F225 and i ran a large 3 blade in 17 pitch.

4 blade is so much better for my 23 (lower plane speed, better bite in chop/turns, better MPG at cruise)