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Old 16 October 2011, 12:17   #11
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Thank goodness for that. I was starting to think Ribnetters were going soft!
There's absolutely nothing worse than an underpowered boat. You don't have to use it, but it's nice to know it's there if you need it. I know which I'd rather have when it gets lumpy & you need to climb a hill or 2
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Old 16 October 2011, 15:26   #12
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Thanks for all your help lads I have put Some new pics of the transom and with the fixed tabs and the hull in my profile any one any ideas???I have looked online for best part of two years but the only hull close is a zoidac but its not got the splash well at the rear this must make the transom stronger

Chatting to a guy with a rib in Portland and he said 150hp but this is mad ????
There a few nice 150hp 2 stroke mercs about at the mo but like I say if I know what it is I could get the transom max weight and hp I think I should just get a 90hp and try it
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Old 17 October 2011, 15:49   #13
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I think some Deltas that were either 5m or 5.5m were rated to 150hp, an old review in a RIB mag said it was one of the best RIB's he used as you could place it where you want due to the power reserve.
I'm not saying a 150hp is the right engine for your RIB though.
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Old 17 October 2011, 16:23   #14
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old review in a RIB mag said it was one of the best RIB's he used
oddly that sort of language crops up quite a lot in mags! I wouldn't mind if you also saw, just as frequently, "this is one of the worst boats I've ever used" or "whilst in expert hands the power was encouraging, it could be downright dangerous for a novice"
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Old 18 October 2011, 01:38   #15
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It was an article on black holes that it appeared in, the point is your better to have power in reserve and not use rather than sitting and thinking I was I bought that 90 rather than this 75....
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Old 18 October 2011, 02:03   #16
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It was an article on black holes that it appeared in, the point is your better to have power in reserve and not use rather than sitting and thinking I was I bought that 90 rather than this 75....
At last, a man after my own heart All this nonsense about overpowered boats being dangerous, is just a rumour started by a bloke with a small engine
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Old 18 October 2011, 03:25   #17
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Hi I have a 75hp on my 5.35 and its very well suited to the hull.
good economy and good top end.
Just powerfull enought to get 2 crew and 6 divers moveing without issues.
and not too powerfull to over power the hull at top end empty.
I have personlay been hunting for a newer 90hp. but as mine is still going strong I am holding off for now.
There has been a few times I was glad of a little power in reserve to get me out of trouble.
Most people go for the maximum power you can afford and the boat will take safely.
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Old 18 October 2011, 03:56   #18
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Curveball time......

Is a lighter weight 75 going to give better handling than a lardy 90? If you don't have the mass to move, you don't need the extra power to move it.....

For example, the engine I took off clocked in at around the 110Kg mark. My current oil burner is 83Kg. I've not had it at full chat due to it being run in, but there is a perceptible improvement in handling even at 25:1 mix & restricted throttle...

Does your hull not have a plate somewhere that gives Max HP & engine weight? If not give the manufacturers a call. I got that info for mine within 2 mins of calling Humber.
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Old 18 October 2011, 04:12   #19
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Thanks 9d280

I don't know the make and there is no plate the tubes have been replaced by hensures and i called them they remember the boat well as it was I right pig to retube due to the cabin but hensures didn't know what hull it was the guy I got it from told me and hensures it was 5.4 sr but it's no way it's that ?????
I have pics in my profile if you want a look
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Old 18 October 2011, 04:27   #20
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Curveball time......

Is a lighter weight 75 going to give better handling than a lardy 90? If you don't have the mass to move, you don't need the extra power to move it.....
Yam 75 and Yam 90 are the same weight, be rude not to stick the 90 on

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At last, a man after my own heart All this nonsense about overpowered boats being dangerous, is just a rumour started by a bloke with a small engine
Yep, only go as fast as you you want it to go.
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