> Mike,
> If you sucked and there was no movement from the activating arm, the diaphragm
> is
> bad (provided you "sucked" hard enough. AND... isn't the 25D mechanical?
> Herb
>
> "Michel R. Gagne" wrote:
>
>> A kind lister just sent me a newish vacuum advance for a 25D distributor.
>> How do I check to see if, and how well it is working. I sucked on the end
>> to no avail, so I9m guessing that the diaphragm is OK, and additional
>> suggestions.
>> Thanks a bunch,
>> Mike Gagne
>> 74 1/2 widget
>
>
I hope I'm not being stupid here, but I sucked hard and nothing happened.
How far should the spring travel? If I pull or push on the arm by hand then
almost imperceptible movement occurs. Is this a problem vacuum unit?
Also, What do you mean when you say that it could be mechanical? Shouldn't
vacuum advance be sensitive to a pressure differential? I hope I haven't
missed something fundamental here, I'm pretty new to this stuff.
Mike
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