Jack Gocha wrote: > > Hi Group > Still trying to sell my Coupe but even when I do I will probably hang > around this list because it's the next best thing to flying for me. > I'm sure most all of you already know that if the magneto ground is loose > or disconnected the engine could start even with the mag switch turned off. > I always turn the prop backwards, by hand, before starting the engine. > Notice I said BACKWARDS, that way the impulse part of the mags doesn't > operate and allow it to start at slow rpms. However if your engine is > equipped with a dry vacuum pump, turning it backwards can cause damage to > the vanes in the pump and should be avoided. > This may sound like unneeded info but if it prevents an injury or death > it's well worth saying. > > Jack G. > N103JF > > __________________________________________________________________________ ______ > To unsubscribe from this list please send mail to [EMAIL PROTECTED] > > _____________________________________________________________ > Keep up with breaking news! Join our Hot Topics list. > http://www.topica.com/lists/breakingnews/t/12
Hello Jack,
I just read your post through, twice, and it raises a couple of
questions in my mind.
I know they do this with round engines as they seem to have more
of a
tendancy to 'flood' and (as I understand it) this is supposed to 'clear'
the cylinders for another attempt to start it.
Here's my first question: If you turn the prop "backwards" with
the mag
switch 'on' and it hits compression on one cylinder and 'bounces' back
in the forward direction and slips out of your hands, (putting you
'off-balance) couldn't this be dangerous since now the impulse couplings
on the mags would be active? Of course if the mag switch is 'off' then
it would be okay as long as the grounding works properly.
Question #2: By turning the engine backwards, the oil pump is also
turning backwards and not pumping any oil into the engine. Wouldn't it
be better to leave the mag switch 'off' and turn the prop 'forward' for
a few blades and lube the cylinders before starting the engine?
Not trying to be sarcastic or critical, just asking for my own
information. If I'm wrong tell me and if I'm right then we both learned
something by comparing 'ideas'.
Thanks for listening,
Bob Saville
N3396H 415C
Eugene, OR
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