that's a full sixed tractor yer talkin about with a yanmar diesel engine... A little out of our L&G stuff around this forum.

anyhow, pull the battery - take it to a qualified shop and have it LOAD tested to determine if it's good or not. Remove the negative battery post first when you take it out. Would expect it's yer re$$ponsibility to replace battery as tractor wus in yer possession...

While the battery is out, clean both terminals and posts with emory/sandpaper to bare metal to eliminate corrosion as part of the prob... also connections to chassis ground.

I kind of disagree, If I had 12K Plus tractor and I loaned it out ( I dought I would do that) I wouldn't want somebody that knows little about batteries, starting and charging system removing my battery let along trying to jump it replace it or charge it if fear of the whole system might get screwed up or burnt up?.

Sorry If I ever borrowed something ( I dought that will ever happen, thats what rental places for) I sure wouldn't be fooling around with it without the owner premission. Yes, I agree it broke on borrowed time so the barrower will of course have to accept some responsibility, but jacking with it and maybe making it worse is not the answer IMO.

rcmoser, that was my thought exactly on the borrowed thing. I have left my key on in my lawn tractor and killed the battery several times and it seemed like that probably happened this time. When the first person suggested doing all sorts of testing I just emailed the guy who agreed that I should just jump it (worked fine). I'm now removing the key entirely so it doesn't happen again.

If you borrow something that needs repair, you repair it. It's nice if you don't have to tell the person before you return it. Why make them worry as long as things are taken care of. If it's more than what I can handle, you ask. I only asked on the tractor since I wasn't familiar with larger equipment.

Anyway... problem fixed. Thanks for the insight.