Slick mag spark plug lead replacement

[Senseipilot]

When my exhaust pipes lost stud and nuts (see previous post on heli-coils) it looks like 2 leads from the left mag are burned. I'm getting more than 150 rpm drop on that side. Can I just replace these 2 leads or is a set required? Can I get a replacement for the burned clip, also?

 

[Steve Pierce]

I don't think your mag drop is from those two leads. You would have a miss on that mag. Leads can be replaced if you have the Slick lead tools. https://www.aircraftspruce.com/catalog/eppages/enginebafflem2755.php?clickkey=4052780

 

[Senseipilot]

Thanks, Steve. The left mags dropping RPM is just recent. I have flown the plane about 10 hours after it sat for over 10 years. Compressions all in the high 70s. What would you check next? I could fly it down to the shop on just the right mags, but I would rather not.

Bob

 

[Steve Pierce]

I would clean the plugs, check the gap and check magneto to engine timing. If Slick mags check the service documents, they have had several issues in recent years with points and distributor gears.

 

[Stephen]

175 rpm drop is allowable.