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23 Pitch prop on a 3.0?
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Author:  Tailwinns [ Tue Aug 25, 2015 2:11 pm ]
Post subject:  23 Pitch prop on a 3.0?
I recently purchased a 2006 180 Horizon with the 3.0 Volvo Penta Engine. It came with a 21 pitch prop that appears to be stock on it and I could easily overshoot my max RPM of 4600 short of WOT. Top speed with 2 adults and 1 child on fairly calm water struggled to get over 35mph. I bought a 19 pitch 4 blade prop to use for skiing and I love what it does for the hole shot. It pulls me out of the water on a slalom ski with 4 adults and 1 child but really sacrificed top end speed. 30mph is a struggle for it with this prop and yes I have GPS verified it.

I have not checked the tach for accuracy yet but I am a fairly confident it won't be terribly far off when I do. My question is has anyone every tried a 23 pitch prop on their 3.0? Most of what I read online is that a 21 pitch 3 blade prop provides a top speed of about 40-42mph at 4600 rpm with the stock prop. I am wondering why Im not even close.

Thanks in advance! Love the boat anyway.
Author:  BartsPlace [ Fri Aug 28, 2015 11:00 am ]
Post subject:  Re: 23 Pitch prop on a 3.0?
I've never been in an 18' boat that wanted to go above about 35mph. The FW website does list ~40mph for that boat, but their spec is usually based on a new, empty, boat. Two factors playing against you might be altitude (you don't say where you boat), and cargo. Maybe with a bit more info we can make some guesses.

Good luck!

http://www.fourwinns.com/upload/Documents/Catalogs/2006/FastFacts_2006.pdf
Author:  Tailwinns [ Fri Aug 28, 2015 12:17 pm ]
Post subject:  Re: 23 Pitch prop on a 3.0?
Maybe 35 is the top end but I hate not being able to go WOT. Especially sinceI am relying on another driver when I ski!
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