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Old 16 August 2010, 09:31   #11
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phone Jace at Ribcraft and get them involved, I have always found them very helpful and anxious to help. You will get to the bottom of your issue quicker and get back on the water sooner.

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Old 16 August 2010, 15:56   #12
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My ribcraft 7.5 does exactly what you describe...but never does it at all if the bow is high up.

So I either fill it up at a garage on a slope (not particularly difficult on Shetland or the Outer Hebrides) or unhook it and raise up the jockey wheel.

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Old 16 August 2010, 17:21   #13
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I have the same problem if the hose nozzle is slightly out of alignment with the filling tube. If the alignment is straight there is no problem.

I wondered if there was some swirly kind of vortex created by the petrol flow that created a resistance or partial blockage down the tube.

Or that might be total fluid dynamics nonsense!
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Old 16 August 2010, 17:44   #14
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Old 16 August 2010, 19:00   #15
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the wifes merc is a sod to fill unless you position the filler a couple of inches out from where it wants to be, the disco can be the same, try moveing the filler nozzle out towards you to ease the back pressure,
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Old 16 August 2010, 19:21   #16
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Just to mention the obvious as no one else has:

Have you checked that the fuel hose from the filler to the tank isn't kinked in any way? It's easy for the pipe to crush down as it goes though bends thus creating a pinch point for fuel to back up.
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Old 16 August 2010, 22:02   #17
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If you have a screen at the vent end check to see if it is clean. The hose could be clean but the vent could keep air from flowing. It definately sounds like a venting issue. If the vent is clean at the terminal end, check the fitting at the tank end. The reason parking on a slope helps is because you are letting air flow easier and preventing a vacuum effect.
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Old 18 August 2010, 11:38   #18
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Just thought I would update.......
Spoken to Ribcraft today, There should not be ANY restriction or elbow inside the tank on the vent connection. I can definately see somthing blocking the end. I will investigate further and update you with whatever I find to be the restriction.........................
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Old 22 August 2010, 07:53   #19
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Well now I'm really frustrated !
Had a REALLY close look and investigation (Its very tricky to get to inside the front main console). Definately looks to me as if under constuction the vent pipe would have been put through a hole drilled on top of the tank and then welded round to seal it. This pipe protrudes approx 30- 40mm into the tank. This end inside the tank looks like it has been bent over at some point (Possibly since it was manufactured ?) I have no idea how to either cut off or unblock this.
Acess is only through the fill connection (50mm opening 150mm standing up from the tank)
Can only just about see in to the tank with a torch and a dentist style inspection mirror.
I did consider drilling down through the breather pipe with a long drill to drill out this bend or kink, but thr prospect of empying a 270 litre fuel tank and getting it to a point I am 100% happy I not just about to blow myself up isn't very appealing.

Any other thoughts or ideas out there ?
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Old 22 August 2010, 08:12   #20
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Any other thoughts or ideas out there ?
Chuck it back at Ribcraft. I'm sure they'll sort it, as their customer service is reputedly, the best in the industry.
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