Slick Mag Rotation

Hi all, I have a question about the rotation of my mags. I have Slick 4301 mags, both are left turning. What does this mean exactly?  If I were to be sitting in the seat and looking at the back of the mags, do I attach the plug wires counterclockwise? Is that what the L means? 

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Permalink Reply by Jay Carter on April 28, 2021 at 7:13pm

Left, rotation from the drive end. Plug wires cap goes on one way. Plug end of wire should have plug location stamped on the nut.

Permalink Reply by Steven Ward on April 29, 2021 at 12:39pm

Hi Jay, my plug wires do not have cylinder numbers on them.

Permalink Reply by James McFarland on April 28, 2021 at 7:17pm

Hi Steven, I was reluctant to answer since I am no expert but here goes as I understand it from my engine (not running yet) and the engine overhaul manual. I have an O200-A. On the Slick mags they are labeled “LH” and “RH” for left and right mags when sitting in the seat. From studying the manual the rotor in both mags rotate clockwise, again looking from the seat. Firing order 1-3-2-4. The left mag supplies a spark to the lower plugs and the right mag supplies a spark to the upper plugs. Someone please correct if me if I am wrong.

Permalink Reply by Arnie Minear on May 26, 2021 at 8:24am

LH and RH denote which direction the mag rotates,  it has nothing to do with which side of the engine it is on. Most Lycomings are LH mags. 

Permalink Reply by Steven Ward on September 17, 2021 at 7:34pm

*****UPDATE*******

In case someone has the same question as I had and finds this post, my slick mags are LH rotation, I initially ran the plug wires clockwise as seen from the pilot seat, this was incorrect and quickly detected by the bad miss. 

I ran the wires counterclockwise and the engine ran splendid. LH means left hand rotation. 

Thanks all for the replies

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