BX 1800 won't stop

noreault · May 23, 2004

BX 1800 won\'t stop

When started up the engine immediately went into a very high rpm and the key wouldn't turn it off. Large cloud of black smoke. Could only stop it by stalling it.

Bird · May 23, 2004

Re: BX 1800 won\'t stop

Not being a mechanic, I don't know what the problem is, but the first thing that came to mind when I read this was that someone put some gasoline in the diesel fuel tank.

noreault · May 23, 2004

Re: BX 1800 won\'t stop

Thanks Bird, but I don't think that is likely. Although it sure would be nice if it was that simple. I'm the only one who fuels it. It was a very strange occurence. I had already mowed for 30 minutes. Stopped for lunch, no new fuel added. Then the run away engine. My wife came out and thought it was going to blow up. Sort of seemed that way to me also.

Bird · May 23, 2004

Re: BX 1800 won\'t stop

Is it possible throttle linkage has come loose, leaving the throttle wide open? I'm afraid I'm not much help; just guessing.

Henro · May 23, 2004

Re: BX 1800 won\'t stop

If it is still under warrenty I think I would be on the phone to the dealer first thing monday morning...

r0GuE · May 23, 2004

Re: BX 1800 won\'t stop

Not likely, but I heard if you injest natural gas or propane in to the air intake this sort of thing happens. Can't think of anything else that would cause it.
Seems to me it has to be fuel or air related. Most likely fuel.

Junkman · May 23, 2004

Re: BX 1800 won\'t stop

Most diesels have a stop solenoid and my guess is that yours is defective. My Benz diesel had a lever on the engine that you would push if the key wouldn't shut it down. I haven't looked for one on the BX, and I doubt that Kubota thought that far ahead to put one on it. I more than likely will be electrical, such as a blown fuse....

BIGUN · May 24, 2004

Re: BX 1800 won\'t stop

I have heard of diesels running away on oil coming past the rings from the crankcase when over reved. The shrimpers who experienced this had air intake shutoff plates to close since the fuel in this situation can't be shut off.

I assume these engines have a governor. If it failed the engine might over rev. The wouldn't explain why the fuel shutoff solinoid didn't work when the key was turned off. I would check for an electrical problem with that.

Maybe both of these problems combined. The governor let it over rev and it started running on it's on oil, in which case the fuel shutoff would not stop the engine.

TresCrows · May 24, 2004

Re: BX 1800 won\'t stop

Hmmm, I also suspect gasoline.
Also, check the throttle linkage, blown fueses to the shut off solenoid. J

BIGUN · May 25, 2004

Re: BX 1800 won\'t stop

Well? Have you diagnosed the problem yet?

noreault · May 26, 2004

Re: BX 1800 won\'t stop

It is at the dealer with a 2 to 3 week backlog. I will post the results as soon as I know.

Junkman · May 26, 2004

Re: BX 1800 won\'t stop

I don't think that a 2 - 3 week backlog is reasonable. Seems to me that it is a easy fix that wouldn't take more than an hour to do. I can understand taking work in the order that it comes in, but I also realize that it is better to get one small job out quickly rather than have the tractor sitting there for 2 or 3 weeks for a 1 hour repair. Talk to the service manager and see if he can get someone to give it a quick look. When I had my shop, we always would at least do a diagnostic of every unit to come in, so we at least knew what to expect when it came into the shop for the repair. If we found that it was a quick repair, we did it immediately so the customer was back on the road. If it is going to be a major repair, I can see the delay....

noreault · Jun 15, 2004

Re: BX 1800 won\'t stop

As promised, here is the results from the shop. Bad fuel injector system which had to be replaced.

BIGUN · Jun 15, 2004

Re: BX 1800 won\'t stop

I think this is the first I have heard of this problem on a BX. Any idea what caused it to go bad?

surfran · Jun 15, 2004

Re: BX 1800 won\'t stop

Thanks for the update, I also have a BX1800 and was wondering what it would end up being. I haven't heard of this issue, so hopefully it is an isolated incident. So far I have had no issues with mine and I have owned it 1 year and 2 months with 92 hours on it.

My hydro peddle does seem to be starting to stick some, and the fuel tank seems to be seeping a little as I do see some moisture in the left fender area, but so far not drips or noticeable areas other than there.

Glad to hear it is fixed and happy tractoring /forums/images/graemlins/laugh.gif

kevinj · Jun 15, 2004

Re: BX 1800 won\'t stop

The fuel injector system is major and expnsive. Are you sure it is not just in the fuel solenoid ????

DaGoatMan · Jun 16, 2004

Re: BX 1800 won\'t stop

That is a pretty vague statement by the dealer... "Fuel injector system"... What does that mean exactly. What part or parts were bad that caused the issue.