[Public-List] A4 Engine puzzler

[Gordon Laco]

Thanks Randy - I did that and found no change, so I reckon the issue isn't
air venting.

I'm going to bypass the selector valve next weekend and see if that resolves
the issue.  I'll report what comes of that.

Thanks for the comments and suggestions.  They've confirmed that I'm hitting
all the bases with my testing.

I'm taking my time dealing with this because in the mean time, the engine
runs fine on tank 1, and we're not planning any long trips before haul out
this year.

Gord #426 Surprise





On 19/08/13 9:19 AM, "Randy Whitney" <moiraeiii at gmail.com> wrote:

> Gord,
> If you have a separate fill hose for tank 2, I suggest that you remove the
> cap and see if it will run. I suspect the vent hose is clogged.
> Randy #283 MOIRAEIII
> 
> 
> 
> On Sun, Aug 18, 2013 at 1:28 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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