[Public-List] A4 Engine puzzler

[Gordon Laco]

I tested that by opening the filler cap - that didn't make any diff.

Rats.

G




On 18/08/13 7:02 PM, "Jason S" <mpcylinderheads at gmail.com> wrote:

> Check vent on tank 2, maybe vent on tank is clogged.
> On Aug 18, 2013 1:29 PM, "Gordon Laco" <mainstay at csolve.net> wrote:
> 
>> Hi Gang,
>> 
>> I hope you¹re all out sailing.... I stole Friday afternoon and yesterday to
>> do a quick overnighter up the coast.  Had a wonderful trip.
>> 
>> This afternoon I¹ve been making a determined assault on the annoying issue
>> SURPRISE¹s engine has;  namely it¹s 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 won¹t 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, here¹s fuel in the fuel filter, so
>> I
>> think it¹s getting gas.   If the carb were getting blocked, it wouldn¹t
>> start again on either tank without a carb cleaning job, but it doesn¹t need
>> that.
>> 
>> When the problem first manifested, it was stalling on either tank, but
>> after
>> I¹d followed Don Moyer¹s advice and retightened all fuel line hose clamps,
>> the problem was resolved with regard to 1, but the issue still exists with
>> 2.
>> 
>> It¹s occurred to me that there could be water in the fuel in 2; so I¹ve
>> been
>> putting fuel line antifreeze in to absorb it.... But it occurs to me that
>> if
>> contaminated fuel were the issue, I¹d have to clean the carb before it
>> would
>> run again and so long as I switch to 2 that doesn¹t 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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> _______________________________________________
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