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Old 11-02-2012
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Re: Prop for my 9.9 Merc used for a sailboat

The previous owner of my Nissan 5hp 2stroke swapped out the prop for a high thrust, it made a huge difference.
I use it on my 135 pound 9'6" rib and it can plane me along at 17mph. Most 'experts' will tell you it takes a 8hp to do that. It also planes my heavy 10'6" wooden bottom Achilles dinghy.

Here's a link that shows what's available for you from just one vendor, it pays to shop around.
Solas High Thrust Propeller » RubexProps

The down side of a high thrust is prop walk and higher boat speed at idle (and RPM will have to be adjusted upward because the load on the engine is greater).
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