Hi folks, 3 1/2 Mark V with Lucas DVXH.6A stock distributor got
about 200 miles on new old stock Lucas 407030 rotor arm and
then found no-start condition from 5-20 minutes after driving
somewhere and turning engine off. Starter cranked strongly,
ether sprayed into carbs did not initiate any combustion.
Timing light on high voltage feed gave steady strobe signal
when engine was cold or when running smoothly, no-start
conditions gave intermittent strobe.
Pulled distributor cap, inspected cap and plug leads. No
evidence of tracking inside cap. Pulled NOS rotor arm and found
tracking on inside of arm to distributor shaft. Replaced rotor
arm with one of the ‘‘red’’ plastic aftermarket items. Car runs
Apparently at least on this one NOS Lucas rotor arm, when the
rotor gets the heat soak after turning engine off, then
internal tracking can occur, goes away when rotor cooled.
What rotor arms are recommended these days to replace Lucas
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