Sterndrive propellers

APP

Recruit
Joined
Apr 23, 2011
Messages
4
Hi,

I would like to ask experts, what would be normally the largest diameter of sterndrive engine propellers. It seems manufacturers have rather reduced size diameters.

Thanks
Best Regards
APP
 

Bob_VT

Moderator & Unofficial iBoats Historian
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May 19, 2001
Messages
26,098
Re: Sterndrive propellers

Welcome.

It depends on the outdrive. What are you trying to accomplish and with which outdrive and motor set up?
 

steelespike

Supreme Mariner
Joined
Apr 26, 2002
Messages
19,069
Re: Sterndrive propellers

I've seen 16" diameter intended for alpa one outdrives.
Diameter is a secondary consideration and simply follows the pitch and application.
Typically as pitch goes up diameter goes down and as pitch goes down diameter
goes up.There are exceptions.
Tell us what you would like to do?
 

APP

Recruit
Joined
Apr 23, 2011
Messages
4
Re: Sterndrive propellers

I've seen 16" diameter intended for alpa one outdrives.
Diameter is a secondary consideration and simply follows the pitch and application.
Typically as pitch goes up diameter goes down and as pitch goes down diameter
goes up.There are exceptions.
Tell us what you would like to do?

Thanks to all. It has to do with a diesel sterndrive (inboard) for a rather heavy catamaran 60 ft and 25000 Lbs each hull. It seems that a sterndrive cannot be used in such a cat as it would require large diameter propeller to move on (engine 300-380 HP) and sterndrives have limited diameters.

Best Regards
APP
 

Bondo

Moderator
Staff member
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Apr 17, 2002
Messages
71,366
Re: Sterndrive propellers

Ayuh,... You keep using the term "Sterndrive" as a generic term, 'n it's anything but...

There are Many different "Sterndrives", by Several manufacturers...
 

APP

Recruit
Joined
Apr 23, 2011
Messages
4
Re: Sterndrive propellers

Ayuh,... You keep using the term "Sterndrive" as a generic term, 'n it's anything but...

There are Many different "Sterndrives", by Several manufacturers...

Sorry. What I meant is this kind of sterndrive (example) : http://www.yanmar.com.au/marine/lp_series/lpseries.htm
This kind of engines Yanmar, Volvo, etc. seems they have standard propeller diameters that apparently are good mainly for light boats. The question is if there are any manufacturers with larger custom made propellers for such a kind of diesel sterndrive engines?
Regards
APP

PS: If my question is irrelevant please cancel this Thread.
 

Bondo

Moderator
Staff member
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Apr 17, 2002
Messages
71,366
Re: Sterndrive propellers

Ayuh,... How big a Ship are We talkin',..??

I think you're putting way to much emphasis in prop Diameter....

Those twin prop drives move Very large boats...
 

APP

Recruit
Joined
Apr 23, 2011
Messages
4
Re: Sterndrive propellers

Ayuh,... How big a Ship are We talkin',..??

I think you're putting way to much emphasis in prop Diameter....

Those twin prop drives move Very large boats...

OK. Thanks. I will check with manufacturers.
 
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