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4 Blade Prop

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danrob

Post subject: 4 Blade Prop

Posted: Wed Sep 02, 2015 10:00 am

Minnow

Joined: Mon Jul 28, 2014 9:41 am
Posts: 17

Hello, I have an H200 with a 5.0 Volvo Penta. My current prop is a 3 blade 21" pitch and wondering if a 4 blade would provide any advantage in acceleration and the ability to stay on plane at lower RPM's.

I have also been told that reversing with a 4 blade is not as responsive as a 3 blade but I am a little bit leery of that.

Your thoughts and feedback would be appreciated.

Thank you,

Dan

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Dan Robinson
2008 H200
5.0 GLX

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zims1993

Post subject: Re: 4 Blade Prop

Posted: Wed Sep 02, 2015 10:22 am

Shark

Joined: Tue May 06, 2014 7:25 am
Posts: 145
Location: Ohio

Its a yes to everything you have listed. Was by far the best thing I have done to our boat, going from 3 blade to 4 blade.

_________________
2008 H200 Frenzy Edition 5.0 GXi

1993 Horizon 190 5.0 EFI (Sold)

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Paul I.

Post subject: Re: 4 Blade Prop

Posted: Wed Sep 02, 2015 11:30 am

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Joined: Sun Nov 21, 2010 8:03 am
Posts: 2238
Location: Winthrop, Ma.

danrob wrote:

Trim tabs would help you stay on plane too.

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rpengr

Post subject: Re: 4 Blade Prop

Posted: Wed Sep 02, 2015 5:14 pm

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Joined: Sun Jul 22, 2012 5:10 pm
Posts: 2032
Location: West Palm Beach, FL

danrob wrote:

I have also been told that reversing with a 4 blade is not as responsive as a 3 blade but I am a little bit leery of that.

I've never heard of that being an issue.

_________________

"Knot Easy" 2000 Horizon 240 Volvo 5.7GS /SX
tow: 2017 Honda PILOT EXL-AWD
prev. boats:
'87 Chaparral 198CXL 4.3 OMC Cobra
'69 Jetstar 16ft Ski Boat, 115hp Yamaha
'68 Aluminum Jon Boat, 3hp Sears
'64 Water Wings

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jontmiller

Post subject: Re: 4 Blade Prop

Posted: Thu Sep 03, 2015 7:43 am

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Joined: Thu Jul 26, 2012 8:16 am
Posts: 296

So what ARE the drawbacks.....only top end speed?

_________________
Jon Miller
1998 four Winns Horizon H200
Volvo Penta 4.3 GL
Newtown, CT

untitled-545 by millerjont, on Flickr

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zims1993

Post subject: Re: 4 Blade Prop

Posted: Thu Sep 03, 2015 8:18 am

Shark

Joined: Tue May 06, 2014 7:25 am
Posts: 145
Location: Ohio

I lost maybe 2mph on top end speed. I kept the same pitch, 19, when going from 3 blade to 4 blade. Do think I need to got to an 18 pitch 4 blade as my max rpm is right at 4100-4200.

_________________
2008 H200 Frenzy Edition 5.0 GXi

1993 Horizon 190 5.0 EFI (Sold)

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danrob

Post subject: Re: 4 Blade Prop

Posted: Wed Sep 09, 2015 5:16 pm

Minnow

Joined: Mon Jul 28, 2014 9:41 am
Posts: 17

My mechanic says that the engine should run at 5000 rpm when at top speed. Dropping pitch will increase RPM's

_________________
Dan Robinson
2008 H200
5.0 GLX

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WildH

Post subject: Re: 4 Blade Prop

Posted: Thu Sep 10, 2015 3:00 pm

Seahorse

Joined: Tue Sep 08, 2015 12:36 pm
Posts: 25
Location: USA

On the topic of props...is there a noticable difference from Alum to stainless?

_________________
'16 FourWinns HS190 SS
4.3L Merc

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deafwish

Post subject: Re: 4 Blade Prop

Posted: Thu Sep 10, 2015 4:03 pm

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Joined: Fri Jul 27, 2012 11:17 pm
Posts: 1303
Location: Melbourne, Australia

WildH wrote:

On the topic of props...is there a noticable difference from Alum to stainless?

Yes!
I went from a Solas Amita 4 (14x21P) to a Solas HR Titan 4 (14x21P) and picked up 150RPM and 3MPH.
The Amita 4 was in brand new condition.

_________________
2011 Four Winns H180 SS.
Aussie built Mustang 2800.
SOLD - 1997 Four Winns Horizon RS

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WildH

Post subject: Re: 4 Blade Prop

Posted: Fri Sep 11, 2015 8:33 am

Seahorse

Joined: Tue Sep 08, 2015 12:36 pm
Posts: 25
Location: USA

deafwish wrote:

WildH wrote:

On the topic of props...is there a noticable difference from Alum to stainless?

Yes!
I went from a Solas Amita 4 (14x21P) to a Solas HR Titan 4 (14x21P) and picked up 150RPM and 3MPH.
The Amita 4 was in brand new condition.

Do you typically match up the pitch when going to SS from Alum? I've been trying to do a little research and have found various opinions.

_________________
'16 FourWinns HS190 SS
4.3L Merc

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captkevin

Post subject: Re: 4 Blade Prop

Posted: Fri Sep 11, 2015 10:56 am

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Joined: Fri Apr 24, 2009 7:22 am
Posts: 461
Location: Chicago

Interesting read about the difference between 3 & 4 blade props.

http://www.boattest.com/resources/view_ ... ewsid=3276

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deafwish

Post subject: Re: 4 Blade Prop

Posted: Fri Sep 11, 2015 5:19 pm

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Joined: Fri Jul 27, 2012 11:17 pm
Posts: 1303
Location: Melbourne, Australia

WildH wrote:

deafwish wrote:

WildH wrote:

On the topic of props...is there a noticable difference from Alum to stainless?

Yes!
I went from a Solas Amita 4 (14x21P) to a Solas HR Titan 4 (14x21P) and picked up 150RPM and 3MPH.
The Amita 4 was in brand new condition.

Do you typically match up the pitch when going to SS from Alum? I've been trying to do a little research and have found various opinions.

Generally, yes.
Because of the strength of SS, the designers can add more rake & cupping - which also increases performance.
Alloy prop's are generally an average blade design, due to flex.

_________________
2011 Four Winns H180 SS.
Aussie built Mustang 2800.
SOLD - 1997 Four Winns Horizon RS

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