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Long shaft vs short shaft

 
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Rick Laughery



Joined: 23 Apr 2008
Posts: 1

PostPosted: Wed Apr 23, 2008 8:19 am    Post subject: Long shaft vs short shaft Reply with quote

What is the correct length for the outdrive for best performance? From the lowest point of the hull to the prop. shaft? I have (2) old stringer outdrives- 1)long shaft, 1) short. Boat came with long shaft on it but it seems to hang down below the hull aprox. 20" and wants to collect alot of plants, debris etc. although no worry about cavitation. Is there any formula or theory on this? Example: more prop. in the water = more pull and less speed etc. Thx, Rick
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MikeW
Senior Member


Joined: 01 May 2006
Posts: 680

PostPosted: Fri Apr 25, 2008 3:04 pm    Post subject: Long shaft vs short shaft Reply with quote

Hello Rick, bottom line the cavitation plate above the propeller should be as close to even with the bottom of the hull as possible for the best performance.
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Crazykole



Joined: 17 Jun 2008
Posts: 1

PostPosted: Tue Jun 17, 2008 6:49 pm    Post subject: Re: Long shaft vs short shaft Reply with quote

MikeW wrote:
Hello Rick, bottom line the cavitation plate above the propeller should be as close to even with the bottom of the hull as possible for the best performance.


Agreed. This makes for less drag and causes the most force on the boat itself...best speed to power ratio.
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