It's happened more times now and it's getting to be a problem. Today I had to try half a dozen times before it went, and when I got home I shut it down and tried re-starting and twice it wouldn't crank. I hear the click of a solenoid and nothing. On the next attempt it started. I know now that moving the shift lever through it's range doesn't have an effect. Then on my last errand it started fine on both ends.
So what do you think? Starter? That's my suspicion.