If he had electrical problems he should have turned the electrical power off and landed at bundabug, the motor would have run fine without the electrical system, I had a similar problem, a LAME put the wrong size fuse and almost burnt out my panel, and electrical smoke was coming from my panel. Now I keep away from LAMEs
so a long story short l just flew home, replaced the damaged wires put the correct fuse, now happy days
that was 600hrs ago.
Daniel