Dirty fuel causing blocked fuel filter if fitted, Fuel cap not venting
causing a vacuum in the tank (my best bet), bad condensor (even new ones
can be crap), plug leads.
Kees Oudesluijs
Op 8-6-2019 om 08:46 schreef Bob Spidell:
> Not Healey-related--although I've heard Healey engines described as
> tractor-like--question for the List wisdom. I have an old Ford
> tractor, model 851 manufactured in the early '50s, with a 4-cyl
> engine.  Compression is good--145+/- on all four--and I've replaced
> points, condensor, distributor cap and plug wires and rebuilt the
> butt-simple Marvel Schebler carburettor (plugs were OK). After the
> work, the tractor started quickly--after I fixed the 180deg-out
> distributor cap--and ran good for 15-20 minutes with a load from a
> scraper. Then, it starts backfiring, tries to stall and struggle for
> a few seconds then, if it doesn't die it seems to recover for another
> 15minutes and then the show starts again. The coil had some corrosion
> in it so I replaced it, with no change. This tractor ran consistently
> but very poorly under load before my work.
>
> Only thing I can think of is the carb float sticking but it was an
> easy rebuild and I recently rebuilt another with no issues. Any ideas?
>
> Bob
>
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