I posted this for a little exercise. The truth of the problem was the Ogura clutch had an intermittent short when it got hot. Since this was for a commercial cutter, that really needed to use the mower, I wired a 15 A fuse holder into the hot wire for the electric clutch, to narrow down the posibilities, and it would blow that fuse instead of the main 20A fuse. Replaced the electric clutch yesterday, and when I removed the clutch found that there was also a bearing freezing up in the clutch. At the very end before I replaced the clutch, it would blow the fuse on engagement of the clutch.
Continuity checks on the clutch showed, .5 ohms instead of the 3.5 that it was supposed to have, with a continuity to ground short. clutch would pass all test procedures when cold.