In a message dated 9/29/98 9:06:07 PM Central Daylight Time,
Lawrie@britcars.com writes:
<<
The most noticeable effect of running too thick an oil in the dashpots is
that the engine will run rich. The manifold vacuum will suck lots of fuel
out of the jet but the piston will be slower to rise, thus not allowing
enough air to mix with the fuel to achieve the right stoichometric ratio.
That's why running too thin an oil (such as Marvel Mystery) makes the engine
sputter; it gets to lean a mixture as the piston rises too quickly and
allows more air than is needed for the available fuel.>>
Agreed.
<< It will only "DIE" if the excessive richness overpowers the spark - which,
I'll admit, could happen under certain circumstances. >>
Actually had it happen to a customer's A-H 100-6. Took FOREVER
to figure out 'cause he just had it flatbeded to me. Died on the road
was all he said. Started, idled and drove on a short road test just fine.
Did several test drives - same result - great runner!!! Finally got to talk
with him 2 days later. Then he told me he was stuck in traffic going
a block an hour type situation. Didn't overheat (hard to believe) but
just died and wouldn't run. He told me that he had just re-tuned the
carbs and just put in some oil sitting on his bench!!!
Cleaned them out, put 20/50 in and went for an hour long <GGGG>
drive, including some nasty stop-n-go traffic. No prob.
Cheers.........
Ed
Ed Kaler, Proprietor
" Just Brits "
Hinsdale, ILLINOIS (a 'burb of Chicago)
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