Propeller

Jul 17, 2011
21
Beneteau oceans 321 Saint John
We have a Beneteau 321 with a 3GM30F yanmar ,looking to upgrade to a folding/ feathering prop
question which model pros and cons of each also two or three blade (price not an issue )
 

jssailem

SBO Weather and Forecasting Forum Jim & John
Oct 22, 2014
23,179
CAL 35 Cruiser #21 moored EVERETT WA
two or three blade (price not an issue )
Oh boy the this an open Pandora's box type of question.
  • Why do you need a new prop?
  • Where do you cruise?
  • Is this because you want to Race or just want to cruise a little faster sailing?
  • Have you searched the Prop Question here on the forum? There many threads about props for all sorts of boats. Just because it is a Beneteau does not mean the prop function will be different than say a Hallberg-Rassy, Catalina, Swan, Rhodes, Oyster,, Hans Christian, Amel Yachts, or any other brand of terrific well designed sailboat.
It is about the engine, the prop design and the transmission. Match these three to your boat clearance (shaft to hull bottom) and you will get a reasonable result.

good luck.
 
Oct 27, 2019
2
Oceanis 321 Branford
I just installed a 3 bladed max prop. easy install and also replaced the cutless bearing. Will update post when we take it out
 
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RoyS

.
Jun 3, 2012
1,742
Hunter 33 Steamboat Wharf, Hull, MA
Have a Max Prop and it has worked great for 16 seasons. As long as you clean the exterior, watch your zincs, and grease it annually it will work flawlessly. It may take a few tries to get the pitch right. With the pitch too aggressive you will not be able to reach full engine speed. Too soft and you will not reach full boat speed. Trial and error works well here. Do not believe manufacturer's claims that these props reduce prop walk. If your prop shaft is not close to level you will have prop walk with all propellers. Follow assembly instructions carefully as it is a bit complicated. Lastly, I would not attempt to change a pitch adjustment under water.