Magneto Question

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dahugo
Class G
Posts: 12
Joined: Thu Sep 27, 2007 9:21 pm
Location: Shreveport, LA

Magneto Question

Post by dahugo »

Gentlemen,

I have searched the posts and cannot find the answer based on my search, so here goes:

I have a brand new YIO-320-D1A installed in my not-yet-flying RV-9A. In wiring the ignition switch, I have to configure jumpers a certain way depending upon whether the left magneto is a "retard breaker magneto" and whether it has "impulse coupling."

The engine manual says that my left magneto is a S4LN-1227. However the engine manual does not provide the information I need, and I cannot find it on the internet. SOOOO, does anyone know if this mag is

(a) impulse coupling and
(b) retard breaker?

Thanks for any help you can provide.


HUGO HOLLAND

Spike
Chief Rivet Banger
Posts: 4013
Joined: Thu Oct 14, 2004 8:40 pm
Location: Baltimore, MD
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Post by Spike »

Hey Hugo,

I would think that you most likely have an impulse coupled magneto. The retard breaker information that I have found makes me think that is most likely for the 'shower of sparks' type of ignition starting system. I would be surprised if this is that you have. I *think* there would be more parts, etc if you had that.

Its probably worth a call to your engine supplier just to make sure.

John
http://www.rivetbangers.com - Now integrating web and mail!
Current Build: 2 years into a beautiful little girl

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