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Old 07-04-2021, 18:27   #1
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Thinking about modding my 10' West Marine Folding Rib

I have a West Marine 10' folding RIB dinghy with a Mercury standard shaft 4hp motor, and it often (airation/cavitation/ventilation?) when cutting through chop and a variety of other circumstances. I think it might be smart to cut the transom down a bit so the prop sits deeper in the water.

The transom seems too high for a standard shaft and too short for the long shaft. Has anyone else had this issue?

Before I start doing surgery on this thing, does anyone have any other thoughts?

JC!
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Old 07-04-2021, 18:34   #2
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Re: Thinking about modding my 10' West Marine Folding Rib

I have the same dinghy. If you do what you are thinking, you may flood the dinghy inadvertently during deceleration or in a chop.
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Old 07-04-2021, 19:01   #3
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Re: Thinking about modding my 10' West Marine Folding Rib

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Originally Posted by bensolomon View Post
I have the same dinghy. If you do what you are thinking, you may flood the dinghy inadvertently during deceleration or in a chop.
Sounds like fun! I'll keep a bilge pump in the boat for when I get too rowdy.
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Old 11-04-2021, 10:22   #4
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Re: Thinking about modding my 10' West Marine Folding Rib

Handled it. Dropping 1.625, the motor sits nicely in the water and never cavitates! Now to do the 4-6hp carb/ prop swap...
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Old 11-04-2021, 18:44   #5
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Re: Thinking about modding my 10' West Marine Folding Rib

Don't forget to upgrade the prop, too. You'll want a metal one if you don't already have one.
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