Bx2350 won't turn off

[davideoftex]

When I turn the key off the tractor won't die. Also when I get off the seat with mower engaged it won't die. ( I kill it with the choke) Both of these started at same time. I changed out the ignition switch but no change.
Any ideas on where to start solving this problem?

 

[GreenYellow]

Check the fuel shut off valve/solenoid. When you turn the key on (before crank) you should get a click or thump. This is the electromagnet opening the solenoid. Even if the solenoid clicks, it could still stick open. Since a diesel doesn't use spark, that's what kills it -- cutting the fuel. I'd start there...

Not sure where it is on your tractor, but with it running, and the key off, try tapping on the valve/solenoid with a screwdriver handle or something that will give it a jolt, but not damage it. If it dies, you definitely found the problem.

 

[Dozernut]

Find the solenoid on top of the engine (Google, Kubota Stop Solenoid 16851-60014 for an image and prices). Use your fingers and pull the rod plunger of the solenoid out and you will shut off the engine. Push back in to start if it won't move on it's own. To replace there are two screws and an electrical plug, hook up the solenoid plunger and you are done.

 

[Pepsiboy]

When I turn the key off the tractor won't die. Also when I get off the seat with mower engaged it won't die. ( I kill it with the choke) Both of these started at same time. I changed out the ignition switch but no change.
Any ideas on where to start solving this problem?

I'm wondering HOW does he use the "CHOKE" to shut it off. There is no "CHOKE" on a BX2350 ! !

Dave

 

[GreenYellow]

I was wondering the same, but I couldn't swear it didn't have one.

 

[GolfAddict]

I have a 50 series BX, a BX24. I had this happen and it turned out to be a blown fuse, the fuel shut off wouldn't activate with turning the key off. Check your fuses first - look at them all. On mine, it wasn't the fuse I thought it would be.

 

[HEC]

I can remember when they use to put a pull cable on the dash so it would shut off the air supply in an emergency on diesel engines , maybe they should reconsider doing this again on tractors . You don't hear about run away diesels anymore , maybe with all this electronic gadgetry it doesn't happen anymore , I'm no mechanic .

 

[GreenYellow]

I'm no mechanic either, but I do work on electronics for a living. It may be a fuse, but it seems exactly backwards. Assuming it's the fuse that controls the fuel cutoff solenoid, it doesn't make a lot of sense. A solenoid requires power to stay open. If power cuts, the electro magnet should close. Apparently it's a multi-layer circuit, or a bidirectional solenoid. Either way -- that's goofy engineering. If a blown fuse can allow the key to be removed and still run, it's just backwards. A blown fuse should not allow it to start to begin with. If it is the fuse, I'd like to know which one, and attempt to make sense of it.

 

[davideoftex]

I'm no mechanic either, but I do work on electronics for a living. It may be a fuse, but it seems exactly backwards. Assuming it's the fuse that controls the fuel cutoff solenoid, it doesn't make a lot of sense. A solenoid requires power to stay open. If power cuts, the electro magnet should close. Apparently it's a multi-layer circuit, or a bidirectional solenoid. Either way -- that's goofy engineering. If a blown fuse can allow the key to be removed and still run, it's just backwards. A blown fuse should not allow it to start to begin with. If it is the fuse, I'd like to know which one, and attempt to make sense of it.

I just read all the replies, and thanks for them. I will go out now and look at fuses and the solenoid shut off thing. That is probrobly what I was calling a choke. I will give my results

 

[David_Kb7uns]

I'm no mechanic either, but I do work on electronics for a living. It may be a fuse, but it seems exactly backwards. Assuming it's the fuse that controls the fuel cutoff solenoid, it doesn't make a lot of sense. A solenoid requires power to stay open. If power cuts, the electro magnet should close. Apparently it's a multi-layer circuit, or a bidirectional solenoid. Either way -- that's goofy engineering. If a blown fuse can allow the key to be removed and still run, it's just backwards. A blown fuse should not allow it to start to begin with. If it is the fuse, I'd like to know which one, and attempt to make sense of it.

Incorrect, imagine every time to go over a bump and your tractor dies because of a loose connection most small Kubota engines power a solenoid to stop.

Most of the pre emissions restricted Kubota engines need no power to operate once started.

The small Kubota engines that have a keystop system to replace the old cable that you would pull to stop the engine, this allows them to put the safety circuits on the PTO, seat, and hydro pedals while also buffering intermittent breaks in the circuit to cut nuisance shut downs

If the power to the keystop timer relay blows or the solenoid fails you must manually move the fuel stop lever to move the fuel rack to the stop position.

Check the fuse supplying power to the seat switches, timer relay circuit and the stop solenoid.

David Kb7uns