Bill.Peyton
Well Known Member
In the process of my annual I noticed the timing of my left and only magneto had drifted 5+ degrees. This magneto was purchased from a VAF'r and had been removed from a new engine with only a few hours on it. It now has accumulated around 240 hours total hours. It should be noted that the mag drop was becoming a bit more than usual, around 150 rpm. The other ignition is an electroair, which has little if any drop when the mag is switched off. The Slick 6383 magneto is a retard breaker mag, with a slick start module. The plug wires were replaced with the mag as were the plugs replaced with fine wire REM38S. This is a IO540 D4A5. Below are the photos. I also attached a photo of the a cap and rotor from a 1000 hour mag for comparison. As you can see, the coil has overheated evidenced by the bubbling of the exterior. The rotor actually has a hole eroded completely through.
The only thing I can come up with for this type of damage, it that the slick start module is continuously running due to a key switch failure. I have not tested the switch yet to confirm.
Any thoughts on the failure mode
The only thing I can come up with for this type of damage, it that the slick start module is continuously running due to a key switch failure. I have not tested the switch yet to confirm.
Any thoughts on the failure mode