is my prop good for my boat?

flyweed · **Posted:** Fri Jun 26, 2015 3:06 pm

Hey All,

Ok, now that I am getting my boat all cleaned up and ready to go again, I have a question about the prop that is on my boat. I guess since I bought the boat used years ago, I never questioned the prop that was on the boat. It is a 14 1/2 x 19 (3 blade) Ballistic Stainless prop. My boat is a 1990 Four Winns 170 Freedom, that has the OMC 3.0L (4cyl) engine in it. We use it mosly for pleasure, and pulling my kids on ski's, tubes, etc.

So my question is, is this prop OK for my boat??

Thanks
Dan

deafwish · **Posted:** Fri Jun 26, 2015 4:24 pm

What RPM does the boat get while trimmed @ WOT?

flyweed · **Posted:** Sun Jun 28, 2015 7:28 pm

well my boats been in storage for almost 3 years..but I seem to remember being able to hit about 38mph on trim, and not sure I remember the rpms.....but I want to say it was around 3600rpm possibly?

GottWhat · **Posted:** Sun Jun 28, 2015 8:06 pm

We cannot determine if a prop is best unless we know max RPM at WOT after proper trim and also your top speed at said RPM

DougT01 · **Joined:** Wed May 20, 2015 6:44 pm **Posts:** 121

I think that's the same prop I have on my Freedom 170 OB, but mines aluminum.
I've never had it WOT because it goes plenty fast lol.
Sounds like it's served you well so far, so why question it now.

Drive on :-)

GottWhat · **Posted:** Sun Jun 28, 2015 10:22 pm

If he is turning only 3600 RPM at WOT that means he is extremely over-propped which is not good for your engine. Or the tachometer could be way off.

deafwish · **Posted:** Sun Jun 28, 2015 11:16 pm

Potential catastrophic engine failure from detonation, being that over-propped! :shock:

flyweed · **Posted:** Fri Jul 03, 2015 8:59 am

well, like I said..it's the prop that came with the boat AND I am trying to remember speed and rpm's from over 3 years ago. I am taking the boat out this next week, and will run her WOT, and trimmed out and see what I am running for both WOT and RPMs and reply back here

Kolia · **Posted:** Tue Jul 07, 2015 9:22 pm

As a reference, I have a 13.25 x 17 Turning Point (3 blades) in my 160 Freedoom, also with a 3.0l GM / Cobra.

flyweed · **Posted:** Mon Jul 27, 2015 11:52 am

Ok...finally had a chance to check this out...again my current prop is a 3 blade Ballistic 14 1/2 x 19. when trimmed and at full throttle I can hit about 4600 rpm's

Any thoughts on "other", maybe better prop choices??

Dan

www.iFourWinns.com

is my prop good for my boat?

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