Well, with the 20w50 in the dashpot, it was extremely stiff. What is an
appropriate weight of oil for temperatures between 11F - 20F?
>
> Sounds weak, and putting lighter oil in the dashpot could well make it
> worse. Workshop Manual says 40 thou from the chamber face to the lowest
> part of the curve on the float. Mixture setting can be tricky,
Can I infer that you think the mixture is too weak?
My info on float height from the video was between 40 - 60 thou, and they
used 50 thou to split the difference. The HIF floats seem to be a little
more difficult to adjust in that it's not extremely clear where exactly on
the float to measure the clearance from.
> turning each
> for maximum idle, then readjusting the other etc is an approximate way.
> Lifting pin is another but can be even more tricky to judge, raising by
> 1/16" should cause the revs to momentarily rise then settle back. If they
> stay up it is too rich, if they die without rising too weak. Better when
I was able to 'dial in' the correct setting when using the lifting pin
method. This is with a warmed up engine, hadn't really tried when it was
cold, since the video instructed me to let the engine come up to
temperature.
> warm? Choke functioning? Checked fuel delivery at the carbs?
Choke IS functioning. There is fuel, but I will check the delivery rate,
although I don't believe that to be a problem.
> Should be at
> least 1 pint per minute. On the principle that 90% of carb problems are
> caused by the ignition did you fully set this up to? Is the tach dropping
> with the stumble? Have you put a timing light on each plug lead
> and checked
> it is is still flashing during the stumble?
No, but that seems like an easy way to determine that. I'll try it. Will
recheck the timing while I have the light out. However, the vaccuum advance
diaphram on my 25D is shot, and it runs on mechanical advance only. Been
like that a long time. The vaccuum port on the manifold is plugged, there is
no leak.
I hadn't observed the tach during the occurance but will look next time I
have a chance to mess with the car. I'm guessing that if the tach drops it's
ignition related?
Thanks for the tips!
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Marc Siegel, Charm Net, LLC. eMail: smarc@abs.net
Baltimore, MD http://www.charm.net voice: 410/361-8160
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