Jim,
It sounds like an overly rich fuel mix to me.
Question--how much choke to you need for your first start-up? How much
do you need for the second? IF you need only a little for the first,
you're running rich, but you shouldn't need any for subsequent starts in
the summer.
Have you tried the old lift-the-piston trick when tuning the carbs?
Lift it 1/8 inch and listen to the revs change? Yep, it doesn't work
well for me either. I get better results with a Colortune.
In any case, for now, turn UP the adjusting nuts a couple of flats and
see if your fouling plugs stay clean longer. If they do, you're on the
right track.
Bob
On Sun, 27 Jul 1997 11:52:57 -0400 "James W. Dunn"
<104610.3053@compuserve.com> writes:
>Hello,
>
> I have a problem wtih my 52 MGTD with the spark plugs =
>
> "fouling out". I can't seem to get more than 80 miles on a new
> set of plugs. When i remove the plugs they are coated with a fluffy
> black coating, so I put in a new set and the car runs great for =
>
> another 80 miles or so and then they have to be changed again,
> The engine was overhauled about a year and a half ago with
> many new parts. The car has just been tuned including points,
> condenser, rotor and dist cap, also the valves were adjusted, the
> timeing set and the carbs adjusted. I checked the compression
>and all the cylinders were within normal limits for this engine. The
>engine doesn't seem to use much oil and I haven't noticed any black
>smoke coming for the exhasut pipe. I use champion L82C spark
>plugs set at .025 and even tried .035 with same results.
> Any help greatly appreciated as I'm tired of changing sparks
>plugs.
>
> Thanks,
> Jim Dunn
> 52 MGTD
> Birmingham, Alabama
>
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