REFLECTOR: IO-360 / Mag Timing?

Wed Sep 12 06:28:52 CDT 2012

Aircraft engines with magnetos are timed statically with the spark plugs
removed.  

Use one of these
http://www.aircraftspruce.com/catalog/topages/synchronizer.php

They work very well.

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Geoff Gerhardt
Sent: Wednesday, September 12, 2012 6:08 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: IO-360 / Mag Timing?

Kevin,

I used a timing light to check my EI timing, but for some reason, it didn't
fire when I clamped the pickup over a Mag plug wire.  I didn't really try to
figure out why (better shielding on the mag wires?) because there's no
advance on the Mag, so it is what it is at static.  I used a buzz box to
time my mag.  But, to attach my timing light, I zip-tied it onto the engine
hoist loop (the handle of the timing gun) and to the aft most bolt on the
top of the case line (the nose of the gun).  I also zip-tied the trigger so
it was on.  Zip-tied the connecting wires so they didn't flap around as
well. I had it lined up right along the case part line.  Then, started the
engine and from behind the strake, I could see where the timing light
illuminate the timing marks pretty good (had to be in the evening, or at
least a cloudy day).

Geoff

On Wed, Sep 12, 2012 at 1:54 AM, Kevin Baker <flykb at verizon.net> wrote:

Hi All,
Ok.. this may be an easy question but I just can't figure it out.
How does one adjust the timing on the mag?
Ok.. I know you install the mag TDC, etc but how does one utilize the timing
light without getting hurt by the prop?

Maybe it's easy - I'm just having trouble figuring this one out.

Thanks,
Kevin Baker
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