ElectroAir MTH Internal Oil Seal Failure
I have 2 ElectroAir EIs on my plane. A few years ago, at about the 250hour mark, my right MTH developed an internal oil leak. The bearing/seal around the shaft was allowing oil to pass from the engine into the housing and fill the area with the trigger wheel and magnetic sensor. Wanting to get the plane back up and running quickly, I opted to have them cross ship me a new MTH (returning mine as a core) instead of having mine sent in for rebuild. Now a few years later and with 480hours on it, the other (left) side MTH has developed the same problem.
This time I could be OK without the plane for a couple of weeks, so I call them up and inquire about getting mine rebuilt. Instead I'm told there is no way to replace the bearing/seal, and that I will have to simply purchase a new MTH. This seems ridiculous for a simple seal failure.
My sensor is functioning fine electronically, and I don't see any evidence of wear metal in the housing, so no reason to suspect it needs anything other than a new seal on the shaft. Has anyone attempted to replace the bearing/seal themselves, and have a source and PN for it?