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Best prop for 15hp 4stroke pushing a 25' sail boat

JanS48

New member
Greetings everyone,
This is a 2004 Mercury 15 HP 4 stroke, 20" leg, non-big foot. With the std 3 blade prop [ 9 x 9 ], the motor pushed the boat along nicely, [6k which is the hull speed for this particular boat at 2/3 throttle] however maneuvering at low speed left something to be desired.

I'm thinking of the SOLAS thrust prop 10 x 7 four blade. They also make a 10 x 5 thrust prop - four blade and a number of other std 4 blade props ranging from 9.25 x 7, x 8, or x 9

Anyone have any experience with going to a 4 blade prop for increased thrust at low speed? Any comments on my proposed choice?

Thanks
Jan
 
Which is better a 3 or 4 blade prop?
Propeller Choices: 3-Blade or 4-Blade Props. Three-blade props offer a nice compromise when it comes acceleration, efficiency, lift and speed. A four-blade propeller, on the other hand, can boost acceleration, efficiency or lift, but at the cost of a lower top speed.
 
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