things went bad b2920 with 6.5 hours on it

[taos]

I was cutting the grass and was almost done when i noticed slight vibration ,i thought one of the blades was loose so I stopped the tractor and checked the blades all was good i then lifted the hood and checked the oil it was full and checked the antifreeze it was full,looked around engine bay all looked good ,so I got back on the tractor and started the engine ,all of sudden heavy black smoke and the engine reved up to max rpm 3500rpm or more? I turned the key off, holding the key in the air not even in the ignition and the engine continued to rev . i tried to close the throtle but it was already closed, no response, i was now thinking this engine is going to blow, i now tried to loosen the fuel filter to introduce air in fuel to stop the flow ,fuel now leaking now i'm thinking fire so i tighen the filter and engine still racing, then i though i better load this engine so I put it in high gear and drive it ,this did bring the engine rpm down a bit around 3200rpm and still blowing black smoke and i notice the fuel gauge now reading about a 1/4 tank, could i be burnning that much fuel it was almost full 5 minutes ago, i could also hear knocking in engine,then after 2minutes it starts to slow down and now i see white smoke ,like when and engine blows (coolant in combustion chamber)now engine shuts off ,I get my son and wife and a friend to push it back in the garage NOT A GOOD DAY, suspect something stuck in injector pump (diesel run away)

 

[thavil]

Holy Crap!! Not sure what I would do in that situation. Good luck on the repair, please keep us updated on what the root cause was.

Anyone know what's the best steps to do in this situation besides what taos tried?

 

[Transit]

I would say that the injector pump is hung up full on. is there oil in it?

 

[Wacky]

Wow!! Do those have a fuel filter bowl that you can see the filter through??? Wonder if the filter came loose and something came through to the injector pump??

 

[Lightnsound]

My B7610 has a shutdown lever on the side of the engine right by where the throttle linkage connects. The engine side cover needs to be removed to see it. I found it by giving it the ol' "what's this do" one day while tinkering under the hood. I have considered attaching a length of aircraft cable to this that will exit the engine compartment somewhere with a toggle handle on it just in case something like this happens.

 

[OrangeRidge]

Manually pressing injector stop ( that's how the system switches itself off -- the click that you hear )would have stopped the engine , but that's too late now. I bet you freaked !
The injector pump has lost spring return and runs flat out . When folk
rebuild these things , sometimes this happens upon first start after
re-installation. Hope there's no engine damage . This is not a good start.
Don't touch anything ; get the Dealer to collect it and fix ........ don't tamper !

 

[Verticaltrx]

Best way to stop an engine in that situation is to cut off the air supply. On these little B-series you would just have to pop the hood and bend the air cleaner back to crimp the hose off. That's the only sure way to stop one in a run away condition as sometimes they are running on their own oil (such as after a roll-over), therefore stopping the fuel has no effect. At least it is under warranty.

 

[BrierPatch]

My B7610 has a shutdown lever on the side of the engine right by where the throttle linkage connects. The engine side cover needs to be removed to see it. I found it by giving it the ol' "what's this do" one day while tinkering under the hood. I have considered attaching a length of aircraft cable to this that will exit the engine compartment somewhere with a toggle handle on it just in case something like this happens.

That shut down lever was the only way to shut off my old B7200 and I was happy to see that my new B engine still had the same lever it just wasn't hooked to anything.

Good luck with the motor. I agree, don't do anything and get the dealer to take care of it.

 

[BrierPatch]

Best way to stop an engine in that situation is to cut off the air supply. On these little B-series you would just have to pop the hood and bend the air cleaner back to crimp the hose off. That's the only sure way to stop one in a run away condition as sometimes they are running on their own oil (such as after a roll-over), therefore stopping the fuel has no effect. At least it is under warranty.

This is best !! I have seen some guys on here post that they always keep a rag on the tractor to stuff in the air intake for this very reason.

 

[charleyfarmall]

6.5 hours. Don't mess with it. It 's the dealers problem and you don't want to jeopardize anything. Let the warrantee kick in. Find out where the fuel cut off is by the filter....