LSE Coil. Source and application

[sailvi767]

This is a old thread I know but I would like to add that I experienced the exact same failure mode as Kahuna. Half of the coil went out. One thing I would like to mention is how I did my ignition check. I would switch to R, then L and then both. With the dual lightspeed setup I only have RPM on the left. I did not see a RPM drop in the check. I would only spend a few seconds in each position. Had I left the ignition in each position longer the drop in EGT would have been obvious. I did detect what I thought was a slight difference when doing the check. This caused me to do a airborne check with the engine leaned and the problem became obvious. In the future I will leave the ignition in each position for at least 15 seconds to give time for the EGT to respond. My engine was very smooth on only 3 cylinders at 1700 RPM. In the air leaned however it was another story! I confirmed the half coil failure as Kahuna did by swapping the leads. The problem followed to the number two cylinder from number 1. Klaus then confirmed that half coil failures easily occur.
Klaus also mentioned that a failure of half a coil is often the result of another problem. Usually bad plug wires with a high resistance or plugs with the gap either set to large or eroded. The increased resistance causes the failure in the coil.
I ordered two from Klaus to keep a spare on hand. Anyone know how fast he normally ships? I miss flying the aircraft!
George

[Kahuna]

Reviving an old thread. Good job George.
Klaus will tell you that the coil is the weakest link. Good news is its very easy to determine a full or half coil failure and as Klaus mentioned, the usual cause is too large of a plug gap.
I fly a lot with the LSE system with the team. I have dual. I never leave home without 2 in my tool bag. One for my buddies, and one for me.
Thanks for the update George. He ships these same day of the order from Ca.

[LifeofReiley]

Nology #152051350 Pro-Fire 12V Dual-Tower, Dual-Fire Ignition Coil ... about $73 buckaroos

Google and you should get a hit.

http://www.nology.com/profiremotor.html

They also already have the dual tower connectors.