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#572968 - 11/12/19 08:44 PM Prop decisions  
Joined: Nov 2019
Posts: 1
Fourwinnsjoly Offline
Warrant Officer
Fourwinnsjoly  Offline
Warrant Officer

Joined: Nov 2019
Posts: 1
Hey all!

I have a 2001 four winns horizon 170 LE 3.0L volvo penta, original prop size is 14.25 21p AL I would like to go stainless and am wondering if anyone has switched with a similar boat? Should I stay same dia. And pitch with stainless or go smaller dia. And lower pitch? I like how the AL works all around. So I want to switch to a SS but try to retain all the above! Any help is appreciated!

2001 four winns horizon 170 LE 3.0 volvo penta 1.97R
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#572970 - 11/13/19 11:12 AM Re: Prop decisions [Re: Fourwinnsjoly]  
Joined: Aug 2004
Posts: 6,546
On Holiday Offline
On Holiday  Offline

Joined: Aug 2004
Posts: 6,546
PA and Smith Mountain Lake
The stainless prop will be less forgiving if the lake bottom decides to come up and grab you. Are there any particular reasons why you want to go with stainless?

2017 Honda Accord Hybrid
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#572971 - 11/13/19 09:45 PM Re: Prop decisions [Re: Fourwinnsjoly]  
Joined: Jan 2003
Posts: 4,712
WaterWing Offline
WaterWing  Offline

Joined: Jan 2003
Posts: 4,712
While I’m not familiar with your configuration, typically you go two pitches down for a SS. Today, most SS props have rubber hubs. In theory that means if you hit something, the rubber gives away before the outdrive gears. I’m all in favor of SS props.

2001 Larson SEi-230 5.7 Merc/Alpha1
2013 Ford Explorer
#572974 - 11/15/19 05:00 PM Re: Prop decisions [Re: Fourwinnsjoly]  
Joined: Nov 2003
Posts: 15,386
GoFirstClass Offline
Retired Boating Bum
GoFirstClass  Offline
Retired Boating Bum
Grand Poobah

Joined: Nov 2003
Posts: 15,386
Pasco, WA
joly, a good friend owns a marina and marine repair shop in town. He LOVES stainless props because people tend to go bottom digging with them.

If you hit solid bottom you want the cheapest parts to break. With a regular prop it's usually the prop. With a stainless prop it's almost always the drive train. My friend gets a lot of business from people who have stainless props on their boats.

"Beachcomber" 1995 Sea Ray 550 Sedan Bridge

Anchor's down......Bottoms Up!
#572994 - 11/20/19 01:31 AM Re: Prop decisions [Re: Fourwinnsjoly]  
Joined: Feb 2003
Posts: 11,882
Frantically Relaxing Offline
Frantically Relaxing  Offline

Joined: Feb 2003
Posts: 11,882
We bought a 17' Bayliner new in '07, 3.0 Merc Alpha One, it came with a 15x19 prop, worked okay... Meanwhile our boat neighbors had a 25' Bennington Pontoon, 5.7 Merc Alpha One with a 14.5 x 21 prop. When loaded down they were having trouble getting on plane. So we switched props-- my prop made a BIG difference in their plane time, and they never ran the thing at WOT so they were VERY happy. And with their prop on our Bayliner, I lost zero plane time, lost about 100 rpm on the top end but cruise RPM dropped by 200 rpm, and top speed went from 40 to 43-ish, all of which made ME happy. They're still running my old prop, their prop went with the Bayliner when we sold it in 2011.

Ergo- if going stainless, I'd suggest a twin to mine, 14.5 x 21, same as your current prop just a bit bigger diameter. If you want to go down to a 19" pitch, I'd say get a 15 or even a 15.5" diameter. But honestly, even with the 21 on the Bayliner it would plane in less than 4 seconds with us and 2 dogs, at 4200' altitude.

Last edited by Frantically Relaxing; 11/20/19 01:31 AM.

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