Just when you thought you'd heard the last on this ...
Having bragged about my scientific creds, I decided I needed to do some
'scientific' experimenting.? I bought a new HD8 diaphragm jet from Tom's
and put it in a jar submerged in denatured alcohol.? If you're not
familiar with denatured alcohol, it's ethanol--i.e. booze--with one or
more denaturing chemicals to make it unpalatable to drink.? When I first
did this thought experiment, I thought DA was mostly ethanol, but the
quart I bought at a hardware store claims to be 45-50% ethanol and the
remainder methanol (and probably some water as both alcohols are
hygroscopic).? Though this mixture doesn't represent the 10% or so of
ethanol in gasahol, IIRC from my college chemistry and lab technician
days that methanol is even more corrosive than ethanol.? So, this should
be a good test of the rubber part of the jet's resistance to these
solvents (and the brass part too, I suppose).? I put new jets in my
BJ8's HD8s two years/12K miles ago, and should have done this then in
case the results were scary, but maybe this will tell us something.?
I'll check the jet periodically for degradation and, if anybody's
interested let you know.
Cheers,
Bob
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