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Old 05 October 2011, 03:16   #11
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Thanks for replies

Hi All
Your comments are very much appreciated,BUT this leaning to PORT did not happen when I took RIb out for a 1 hour run of approx 25 miles, all was fine, we moored for 45 mins and then on return journey the lean was there straight from setting off...very odd.
I'm just back from long weekend away and will get ochacking all you r ideas
thanks again
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Old 05 October 2011, 03:31   #12
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Hi All
Your comments are very much appreciated,BUT this leaning to PORT did not happen when I took RIb out for a 1 hour run of approx 25 miles, all was fine, we moored for 45 mins and then on return journey the lean was there straight from setting off...very odd.
I'm just back from long weekend away and will get ochacking all you r ideas
thanks again
Which way was the wind blowing? most boats lean into the wind and the wind could have been balancing the boat going out and making it worse on the way back in? Either that or something else changed.
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When a boat looks that good who needs tubes!!!
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Old 05 October 2011, 04:05   #13
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Is it still doing it since you drained all the water out? Shouldn't really be water in the hull so sounds like you have a leak?
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Old 05 October 2011, 04:28   #14
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Got a Rib last week
So is this the first time out? Mine did that with a 55, like to the point that with three heavy people on the uphill side it still wouldn't go level. Only ever happened above 21 Knots.

Wasn't 'till the engine died & I took the opportunity to turn it over & remove 30 years worth of antifouling that I discovered that the hull had been repaired by one of it's previous owners.

The "as designed" side had a slight concave, presumably to give a bit of lift to the back end. Problem was the repair (at the rear, immediately in front of the transom) was convex. Got it ground back to symmetrical, problem gone.

As you presumably have a used boat, if the hull has been painted or antifouled, it might be worth doing a compare & contrast port / starboard at the stern. (& if not obviously symmetrical, scrape some paint to check for repair) Its not hugely likely, but worth eliminating before you start mucking about moving engines, as it's just a case of a good look.
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Old 05 October 2011, 05:03   #15
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What were the sea conditions? Single engined boats tend to list due to prop torque, especially when coming off waves as the prop is usually the last bit out of the water. If you had waves on your "listing" beam on the run out, the sea would have counter-acted the prop torque, effectively pushing the boat back upright. On the way back, on the opposite beam, it would have compounded it.
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Old 05 October 2011, 08:16   #16
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Unless you re fueled you've reduced the weight/ballast as well on the return journey. You say 25 miles so you will have burned approx 25 litres of fuel, this may well have changed the set up, especially if you altered the trim when you moored, set off again.

My Rib will heel considerably, if trimmed in too much, I'd certainly try trimming out first to see if that cures the problem
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Old 05 October 2011, 14:00   #17
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Of course all this assumes you dont have a leak at the cone on your port tube thats letting water into the port tube whilst under way, thereby adding the weight and list ... it would be rare,.. but I have had that problem ,.. which ultimately caused the tube to explode .. that was a fun story Ive yet to do a ribnet elaboration of
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Old 16 July 2012, 10:25   #18
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Hi chaps, old thread I know, but we have just setup a Humber Ocean Pro 7.5 with a 2.8 beam, Honda 250hp which is torquing off to the left badly. the engine is offset by 1.75 inches and the trim skeg is also about 5 degrees off to sbd.

Has anyone got any data on this boat? Any suggestions before we start drilling more holes!
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Old 16 July 2012, 10:54   #19
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Hi chaps, old thread I know, but we have just setup a Humber Ocean Pro 7.5 with a 2.8 beam, Honda 250hp which is torquing off to the left badly. the engine is offset by 1.75 inches and the trim skeg is also about 5 degrees off to sbd.

Has anyone got any data on this boat? Any suggestions before we start drilling more holes!
Engine height correct?
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Old 16 July 2012, 12:48   #20
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Engine height correct?
Thats where I'd start.
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