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jdubner(at)yahoo.com
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 Posted: Sat Jun 03, 2006 3:46 pm Post subject: Jabiru 3300 Engine Grounds |
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I'm helping a friend by wiring his Zenith Zenair 601 with a Jabiru 3300
engine using a variation of Bob's Z-20 architecture. The documentation,
at least what I've seen of it, is very sketchy on the electrical systems
and I'm unable to find any reference to grounding the engine.
Where have other builders connected the heavy ground braid (that carries
the return current for the starter)? I know where to connect it on a
Lycoming but this Jabiru is *very* different 
And where have others connected the braids of the magnetos' P-leads?
Again, I know where to connect them on Slick magnetos but what did other
builders use for convenient, nearby ground studs?
Thanks,
Joe
Joe Dubner
Long-EZ 821RP
Lewiston, ID
http://users.lewiston.com/hth/jd/
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noelloveys(at)yahoo.ca
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| Posted: Sat Jun 03, 2006 8:23 pm Post subject: Jabiru 3300 Engine Grounds |
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The braid ensures a good ground across the engine mount. I feel you are
right that it is important to have the good ground for the best operation of
the starter motor and lets not forget the ground for the charging system.
The best place to run the braid is from any convenient stud on the engine
block (one of the popular places seems to be the engine half studs) to the
frame of the plane. Make sure the areas around where the braids connect to
the block and the frame are electrically clean.
I've seen many that use one of the engine mount bolts for the frame side of
the ground. I've also seen at least one installation where there was two
braids... One on each side of the engine... Probably a bit of overkill.
Noel
[quote] --
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