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Old 03 September 2015, 14:44   #1
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Country: UK - England
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3.1m rib min engine size

Hi I have a 3.1m rib and I'm looking an engine.
What do you think the minimum size engine to plane with 2 13 stone guys on board
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Old 03 September 2015, 15:46   #2
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Quote:
Originally Posted by Disschord View Post
Hi I have a 3.1m rib and I'm looking an engine.
What do you think the minimum size engine to plane with 2 13 stone guys on board
Do you know what the boat is rated at, this will usually be on a plate on the transom.
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Old 03 September 2015, 16:01   #3
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Max 11.2kw which I think is 15hp
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Old 03 September 2015, 16:05   #4
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6hp... perhaps in ideal conditions with some luck and a tail wind... but very marginal.
8hp... quite likely to plane but might have to coax it over the hump.
9.8/10hp... probably the optimum power for this size and your load.
15hp... much easier
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Old 03 September 2015, 16:07   #5
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6hp... perhaps in ideal conditions with some luck and a tail wind... but very marginal.
8hp... quite likely to plane but might have to coax it over the hump.
9.8/10hp... probably the optimum power for this size and your load.
15hp... much easier
That's great thanks
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Old 03 September 2015, 16:54   #6
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Oh and I'm assuming this is a really light RIB if hard hull or a SIB. One way of getting an idea is to search Youtube videos by engine size.
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