I have noticed that there is a difference in props on these boats.
Even when they have the same 20hp engine.
Can anyone advise the pros and con as I have seen them with 2, 3, and 4, blade props.

I understand that if sailing with a 2 blade and if you can align it with the keel it reduces drag. But what is the difference when motoring

Regards

Hi Ray
There are many factors which influence what prop suits your boat best.
The simplest way is to ask a marine engineer or boat builder.
http://www.swatchway.pwp...-projects/propcalc-1.xls 

Mike Edwards
Seal 28 "Aztec"

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