BX engine almost stops on big bounce

[tshep]

2003 BX23, cutting overgrown 'grass' fields.
Maybe 5 places where tractor will bounce over (unseen) ruts.
I'm rolling, trying to get done.

Tractor bogs, but not a load bog. It bogs as though a fuel safety has cut fuel off. Would stop engine until I learned to stop PTO drive, shut down throttle, and wait it out, running rough - maybe 5 seconds - then rev back up and re-engage. And yes, it is enough to throw me up too, I catch on to prevent the subsequent drop.
(If I just raise the seat while running, and put it back down, engine recovers instantly - this is different.)

It seems like those cars where a bump required a fuel reset?

Any parts or processes that inherently act as a safety on a big bounce?

I suppose I could be jostling low lying fuel water 'up' into flow, but only on bounce?
The machine runs fine at all other angles I may work at, up, down, sideways, combos.
Makes me think not.

Any suggestions, as to cause?

 

[RjCorazza]

I would still bet on the seat safety switch. My previous ZD mower would do that when rolling on bumpy terrain, and it was activating the seat switch many times untill I ended up in a fuel starved condition.
The stirring up bad fuel in the tank is also a possibility, as you mentioned. It would be particularly susceptible to that with less fuel in the tank.

 

[BleedingOrange]

It sure sounds like the seat safety switch to me as well. If you want to test the seat switch, pull the plug apart under the seat, and stick a paper clip into the harness side. Try that and see if it cures your problem. Since I am the only driver of my BX2370, I,ve been in test mode since 2016.

 

[dodge man]

I’m not sure reading your post if the engine is stumbling or not? If it is there are two fuel filters on a BX, one up front near the engine and another one towards the back underneath. If you have a mid mount mower on you need to remove it to get at it. It’s almost always the back filter that’s plugged.

 

[bdhsfz6]

Could be a partially clogged fuel filter in combination with the seat safety switch.

 

[Hay Dude]

Seat safety switch or battery cable loose/corroded connection.