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Old 29 December 2018, 13:43   #1
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Country: UK - England
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Have I just gone too big!??

Hi all, new to the forum and just acquired my first rib. Itís a project, early 1990s Humber destroyer I think 5.5m
Iíve got a 150hp Yamaha v6 to go in the back. Itís 15kg over the transom weight, big question is will this be a problem the main thing is it has to be safe to would welcome any thought from more experienced rib users

Thanks
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Old 29 December 2018, 13:49   #2
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What's it rated at hp wise if 150 I would go with it personally
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Old 29 December 2018, 13:52   #3
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I think the modern version is 115hp which is where I got the transom weight from but there is no plate on this one to tell me unfortunately
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Old 29 December 2018, 13:57   #4
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I know the old 5.8 Destroyer was rated for 150 so the 5.5 would probably have been around the 130hp?
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Old 29 December 2018, 13:58   #5
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Quote:
Originally Posted by Benbound1617 View Post
I think the modern version is 115hp which is where I got the transom weight from but there is no plate on this one to tell me unfortunately
I would contact Humber for a spec before doing anything they will advise you
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Old 29 December 2018, 14:35   #6
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150hp v6 on a 5.5m, you asked about being safe...I wouldn't even contemplate putting that on there buddy.
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Old 29 December 2018, 16:18   #7
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Itíll be reight
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Old 29 December 2018, 16:29   #8
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150hp v6 on a 5.5m, you asked about being safe...I wouldn't even contemplate putting that on there buddy.
But a 400hp Allison gasturbine would be just amazing...

Gas turbine RIB?
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Old 29 December 2018, 18:08   #9
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I had a 150 hp v6 on the back of my 5.85 for years an it was fine.
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Old 30 December 2018, 02:32   #10
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Also had a 150 merc on a 5.5 Humber Click image for larger version

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Went well with no issues and I know it's still going now after 8 yrs
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