REFLECTOR: IO-360 / Mag Timing?

[Scott Derrick]

No, no.

Install the mag, remove the top plugs(don't be lazy do it).

Setup your marks do you can tell when you are the correct degrees before 
TDC for your mag.  See your engine manual for this.

Rotate the engine so its before the timing point(this will be just 
before TDC for #1 cyl).  If its an impulse mag trigger the impluse, then 
back up past the point.

Connect your mag timing box to the mag.(MAG switch ON!, be carefull!)

move the prop so it is on the mark

A) Now turn the mag so the light/noise just comes on. (initial setting)

B) rotate the prop back so the noise/light goes out, plus 10 degrees.

C) slowly bring the prop forward, stop when the light/noise comes on, 
see if you are on the mark. If not adjust the mag(little bit!).  repeat 
steps B&C until the noise/light comes on right when the on mark as you 
rotate the prop.

D) tighten down the mag, recheck!!!

Do the other mag if you have two.

Scott


-------- Original Message --------
Subject: Re: REFLECTOR: IO-360 / Mag Timing?
From: Kevin Baker <flykb at verizon.net>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Date: 09/12/2012 07:35 AM

> 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
>> _______________________________________________
>> To change your email address, visit
>> http://www.tvbf.org/mailman/listinfo/reflector
>>
>> Visit the gallery!  www.tvbf.org/gallery user:pw = tvbf:jamaicangoose Check
>> new archives: www.tvbf.org/pipermail Check old archives:
>> http://www.tvbf.org/archives/velocity/maillist.html
>>
>> _______________________________________________
>> To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector
>>
>> Visit the gallery!  www.tvbf.org/gallery
>> user:pw = tvbf:jamaicangoose
>> Check new archives: www.tvbf.org/pipermail
>> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>
> _______________________________________________
> To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery!  www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>

-- 
It is a miracle that curiosity survives formal education.
Albert Einstein