I guess a broken timing chain would kill motor and jam while trying to restart. I've never heard of it doing that, BUT.....
Anyway it is worth something that it is in the known event category rather than sitting for 10 years category. It does sound like a major component failure rather than what I was thinking, I.E. "frozen" from being neglected, moisture turning into bore wall rust, all the rotating surfaces dried out/no oil and causing major friction throughout.(soft lockup) That type can be unlocked most of the time. I am now thinking front end (chain/jammed) or rear end (clutch/tranny locked/jammed/broken).(hard lockup). But again I'm assuming this type owner checked oil and water, etc. and these motors don't break much inside. Super, super, super, strong components. Others may have had this happen and may post.
