[Public-List] A4 Engine puzzler

[Glenn]

Sounds like the pickup tube in your second tank has corroded through, causing a break in the fuel suction. 

Glenn B
dolce 318

Sent from my iPad

On Aug 18, 2013, at 10:28 AM, Gordon Laco <mainstay at csolve.net> wrote:

> Hi Gang,
> 
> I hope you’re all out sailing.... I stole Friday afternoon and yesterday to
> do a quick overnighter up the coast.  Had a wonderful trip.
> 
> This afternoon I’ve been making a determined assault on the annoying issue
> SURPRISE’s engine has;  namely it’s dislike of running while the fuel
> selector is set to Tank 2.
> 
> It runs fine on Tank 1, but when the selector is set to 2 it runs for only a
> few minutes then cuts out and won’t restart.   When I put the selector back
> to Tank 1, it starts again after a lot of cranking...but at first only with
> the choke on (it gets over that quickly).
> 
> When it stalls while running on tank 2, here’s fuel in the fuel filter, so I
> think it’s getting gas.   If the carb were getting blocked, it wouldn’t
> start again on either tank without a carb cleaning job, but it doesn’t need
> that.
> 
> When the problem first manifested, it was stalling on either tank, but after
> I’d followed Don Moyer’s advice and retightened all fuel line hose clamps,
> the problem was resolved with regard to 1, but the issue still exists with
> 2.
> 
> It’s occurred to me that there could be water in the fuel in 2; so I’ve been
> putting fuel line antifreeze in to absorb it.... But it occurs to me that if
> contaminated fuel were the issue, I’d have to clean the carb before it would
> run again and so long as I switch to 2 that doesn’t happen.
> 
> The weird thing is it ran quite happily on either for many years before this
> started happening last season.
> 
> Does anyone have any suggestions?
> 
> Gord #426 Surprise
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