REFLECTOR: IO-360 / Mag Timing?

[Kevin Baker]

Ohhhhhh   I get it now.
Whew  that makes me feel better.
I thought the ap was going to want me to get close to a running engine- which would not happen.

Thanks
Kevin Baker

.

On Sep 12, 2012, at 9:38 AM, John Dibble <aminetech at bluefrog.com> wrote:

> Kevin,
> 
> The pin is used to get the mag timing in the ball park since there is a limited adjustment range once the mag is installed.  Then you use the timing light to get the exact timing.  Connect the "hot" timing light clip to the P-lead (mag switch must be "on") and the other clip to the mag ground.  Position the #1 cylinder at TDC.  Then rotate the prop in the backward direction until the light comes on.  You should then be at the advance timing mark in which case you're done.  If not, loosen the mag attach bolts and rotate it slightly so that the light comes on right at the advance mark.
> 
> John
> 
> On 9/12/2012 8:35 AM, Kevin Baker wrote:
>> Oh   So you don't do any timing with the engine running or with a light?
>> You just set the mag with the pin to the engine flywheel timing mark and your done. Nothing else ?
>> I thought there was something about rotating the mag to adjust something.
>> A local ap was talking about a timing light so that started to confuse me.
>> 
>> Thanks
>> Kevin Baker
>> 
>> .
>> 
>> On Sep 12, 2012, at 8:17 AM, "Patrick Sieders"<pjsieders at comcast.net>  wrote:
>> 
>>> Kevin,
>>> 
>>> There is two ways to do it. And it all depends on if the magneto was removed
>>> or not.
>>> 
>>> 1.    at an inspection, since the spark plugs are removed, that will make
>>> the prop much easier to turn (no compression). This is by far the best way.
>>> 2.    If the magneto is being replaced onto the engine, the cap with the
>>> sparkplug cables is not on, and then find compression stroke on cylinder #1
>>> by removing only that spark plug (one of the two).
>>> 
>>> Then time it. I used to time it back and forth, since there is some play.
>>> But I would make certain that the magneto is set deadon on the correct
>>> rotation direction of your engine. First time the left magneto, then match
>>> the right.
>>> 
>>> Now, your question actually sounded like you asked the inside timing of the
>>> mag.. but the next sentence refered to timing on engine. So hopefully this
>>> is what you wanted, otherwise I can explain a little more about the internal
>>> timing later.
>>> 
>>> Hope it helps !
>>> Patrick Sieders
>>> Nashville TN
>>> Velocity XLFG-5
>>> 
>>> 
>>> -----Original Message-----
>>> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
>>> Behalf Of Kevin Baker
>>> Sent: Wednesday, September 12, 2012 12:55 AM
>>> To: 'Velocity Aircraft Owners and Builders list'
>>> Subject: REFLECTOR: IO-360 / Mag Timing?
>>> 
>>> 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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> 
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