Ferg,
I know you have already looked at the Tony Bingalis "Firewall Forward
and or Knuckles AeroElectric Connection, but for others:
Please use standard aircraft wiring procedures to secure a suitably
sized wire from the engine block to the airframe to handle engine
starter grounding amperage requirements, instrument grounding and
accessories (I use a short #4 cable minimum). No matter what, make sure
the wire ring connector is solidly in contact with the block/head of the
engine.
In the past I used the M6 bolt that the bracket coming off the engine
block, which holds the ignition coil boxes, however on the new Rotax
engines make that area harder to get to.
My new two favorite places to make a ground contact are:
The engine lift points behind the gearbox or in the hole on the #4
engine cylinder near the head bolt.
They all worked fine.
I run my main battery ground to a 5/16 stud through the firewall, and
---From this point to the block, and on the inside of the firewall I run a
#10 wire to the panel/airframe for a low power panel or a #8 for a high
power panel.
Bud Yerly
----- Original Message -----
From: Fergus Kyle<mailto:VE3LVO@rac.ca>
To: EUROPALIST<mailto:europa-list@matronics.com>
Sent: Tuesday, March 17, 2009 11:01 AM
Subject: Europa-List: Grounding strap,firewall-914 engine
Cheers,
I may have made a tactical error - in running the grounding strap
from my 'forest-of-tabs' on the firewall to an M6x16 bolt holding the
plastic ignition cover on the back of the engine. Admittedly, the bolt
threads into the ignition housing but now I'm having nervous thoughts
about
the cover.
Where did you ground your strap to the engine?
Thanks, ferg
Europa A064
Wiring wiring wiring
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