At 06:48 PM 11/5/2009, you wrote:
>
>Hello!
>
>The Jabiru manual doesn't say much about the mag wiring. On each of
>my coils, there is a 1/4" faston tab. I have 20awg shielded wire for
>each ignition. I've read through the Book and understand when the
>mags are ungrounded, they are hot. Flipping the mag switch off
>completes the ground ground and kills the mag.
>
>I've attached a doc that shows what I understand and what I don't.
>Quotes are from Bob's book in Note 3 of the Z appendix, I believe:
>
>1. "Attach the shield to one and only one switch terminal at the
>cockpit end..."
>
>How do I do this? I can strip off the outer insulation and expose
>the braided shield. For a 20awg wire, using a 16awg stripper is
>about right. That's about as far as my brain will take me. Seems
>like I would splice the outer braid to a wire, and connect that wire
>via faston to terminal #2 of the switch. Another faston would go on
>the inner wire and connect to terminal #3. I just don't know how.
>
>2. "Attach the shield to engine ground at the magneto end."
>
>The drawing shows shield going to one spot on the ignition and the
>inner wire going to another. I have just the faston tab of the coil.
>How is this done?
See:
http://aeroelectric.com/articles/shldwire/shldwire.html
Put faston female on engine end of center conductor
and install on magneto coil tab. Put ring terminal on
engine end shield and take to crankcase ground via
mounting bolt (on ignition coil?). If necessary, slice
onto the shield to extend to nearest practical mounting
bolt. NOTE "mounting bolt" means some fastener that holds
detail parts and/or accessories on the engine. This does
not mean any bolt with a critical torque value
for the maintenance of structural integrity. I
once had a guy remove a head-bolt to "ground" some
wire to his engine!
Attach other end of shielded wire to switch. Prepare
ends the same way. Install fast-on or ring terminals
as appropriate. Connect so that the wire and shield
are connected to each other when the ignition switch
is closed (OFF).
Bob . . .
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