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Old 27 August 2013, 06:16   #1
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Country: UK - Wales
Town: N Wales Chester
Boat name: Mr Smith
Make: Humber
Length: 6m +
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What determines the max hp on a small rib/sib?

My 2.5m Avon RIB is rated to 4hp, yet there seems to be 3m ish SIBs and RIBs that take 15hp 20hp even 30hp.

With a hard hull for the transom to attach to, I'd have envisaged i could put a Twatsoo 9.8 on the back. The 2hp 90's merc is about half it's weight i think....

Any thoughts?

Other than that it would be fun.
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Old 27 August 2013, 06:46   #2
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Country: UK - Scotland
Boat name: Wildheart
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I guess it's probably CE ratings or something - either down to how well the transom is attached to the hull or it could become ridiculously unstable at speed.....

...which brings you back to fun!
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