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Old 29 October 2007, 21:01   #11
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There are Two fuel filters under the cowling. The secondary filter is much smaller. How many hours do you have on the engine? Have you had any overheats?
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Old 30 October 2007, 16:55   #12
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Tim,

deffo sounds fuel related, I am suprised that Fairweather could not fix the problem?

Chris


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I have changed the plugs, but still no success.
I'm 99.9% sure we have checked all the filters - there is only one inside the engine which is a half size transom type filter/separator.
Codders, there is no fuel computer to worry about on this boat which rules that out.
Running off an external tank is the plan for tomorrow, as is replacing the priming bulb.....
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Old 01 November 2007, 10:19   #13
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An update

Following the comments on here I concluded that it must be a fuel problem. On Tuesday I went down to the boat with the intention of checking every bit of the fuel system that I could, to hopefully reveal a problem. I worked from the tank, back, checking all the hoses, connections, breather etc etc. I eventually got to the engine, checked the internal filters (yes there are two - I discovered anther small one). I then got to this "thing" which (you can tell I'm not a mechanic) I think is the pump (see photo). Anyway, I noticed that whatever it is has a drain valve on the bottom, with a small hose coming off it, as well as a breather screw on the top. I assumed that this must be to drain the fuel off, so I gave it a go. It did indeed drain the fuel out, but what was most interesting was that when I drain it out there were some bits of debris in the fuel. I flushed fuel through it and then out several times, then blow back up the hose, followed by more flushing and more blowing.

We have used the boat a few times since, just running around the harbour, and so far it seems fine. I did take it for a short test run at speed, where again it was fine. I'm hoping and praying that this was the problem as it seems to be a nice quick fix should it happen again. The proof will be this weekend when we take the boat to Weymouth for the BUSA Nationals.

What I find odd though is that debris managed to find it's way in there. The trouble originally started around the same time that the main transom mounted filter/separator got damaged, so we bypassed it for a week or so until I got a new one. That would still have left the two internal filters, neither of which had anything significant in. Any thoughts?
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Old 01 November 2007, 11:00   #14
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Pleased you got that sorted Tim. Having used your Rib - its a really good piece of kit. And the engine was awesome when I was on it back in the summer.
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Old 01 November 2007, 14:16   #15
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What did the debris look like?
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Old 01 November 2007, 15:42   #16
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It was tiny little its of brown/dark coloured crap
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Old 01 November 2007, 18:53   #17
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It was tiny little its of brown/dark coloured crap
Odd. Was it rubbery at all?
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Old 01 November 2007, 20:59   #18
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that's your vapour seperator. theres usually a filter gauze before the pump pickup inside the unit that might be worth checking/replacing if you found debris.
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