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post #3 of Old 11-02-2012
chucklesR
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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).

Lessons learned are opportunities earned.
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