BX2380 engine / fuel issue?

Kubota in PA

New member

Equipment
Kubota BX2380 with FEL, 60inch mower, and box scraper.
Jun 29, 2024
11
5
3
PA
I'd run for 5 minutes,probably a lot of unspent fuel in the cylinders and needs to be cleared out'.
So I got it started, it even smoothed out a little bit about 5 minutes into letting the engine run. When it sounded close to normal, I tried to throttle up a little, but no change at all. I could see the throttle lever engaging, but no change to the RPM. At nearly 10 minutes on my timer, I tried to increase the throttle again, but it started to rattle harder so I shut it off.
 

GreensvilleJay

Well-known member

Equipment
BX23-S,57 A-C D-14,58 A-C D-14, 57 A-C D-14,tiller,cults,Millcreek 25G spreader,
Apr 2, 2019
13,002
5,721
113
Greensville,Ontario,Canada
There are TWO filters, one between tank and lift pump, 2nd between lift pump and Inj pump.
Assuming BX2380 is same as my BX23S.
 
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Kubota in PA

New member

Equipment
Kubota BX2380 with FEL, 60inch mower, and box scraper.
Jun 29, 2024
11
5
3
PA
I've swapped both filters and have installed them same direction as the previous ones.

Dealer called me tonight and is sending a tech tomorrow. But I appreciate any other suggestions and will keep you posted.
 

GreensvilleJay

Well-known member

Equipment
BX23-S,57 A-C D-14,58 A-C D-14, 57 A-C D-14,tiller,cults,Millcreek 25G spreader,
Apr 2, 2019
13,002
5,721
113
Greensville,Ontario,Canada
Glad he's coming out cause I'm at a loss to understand what's going on. Hopefully his 'bag of tricks' and 'magic wand' will get her up and running, right !!!!

hmm, any chance the power connector for the lift pump is disconnected ? Last filter change mine was ! Have no idea how long but engine ran fine.......
 
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Springer

Member
Lifetime Member

Equipment
BX2680 LA344S EA 55" Grapple, Stump Bucket 48 Box grader, Disc Harrow
Jul 21, 2021
98
56
18
Tiger, GA
I've swapped both filters and have installed them same direction as the previous ones.

Dealer called me tonight and is sending a tech tomorrow. But I appreciate any other suggestions and will keep you posted.
I have to ask this question, only because it just happened to me.
Did you buy those filters from Kubota? Or and auto parts store!

I had a tech come up last fall. I had him service my tractor (bx-2680) and he used auto parts!!! Two auto parts fuel filter and an auto oil filter for the hydralics.

Diesel is considerably denser than gasoline and will not flow through an auto filter correctly. In fact, it caused my fuel pump to burn up because it had to work so hard to push the fluid. When you get it running, reach under and see if your fuel pump (between the filters) is hot to touch.
 
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Vaterlemon

New member
Aug 7, 2025
1
1
1
Boston, MA
I had a similar issue and found a crack in the fuel line near the tank that was sucking in air. Replaced the line and it ran smooth afterward.
 
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Springer

Member
Lifetime Member

Equipment
BX2680 LA344S EA 55" Grapple, Stump Bucket 48 Box grader, Disc Harrow
Jul 21, 2021
98
56
18
Tiger, GA
Here is my discovery.
I pulled the filters off along with pump. I replaced the filters and the pump. Ran good for awhile then repeated the problem.
I pulled the filters off, assuming they had clogged. But they looked fine. I ran the fuel pump from my battery charger with the suction hose in a jar of diesel fuel treatment. It pumped perfectly and did not eject anything unusal.
Even I removed the clamp I had put on the line leading to the fuel tank but it only dribbled. I knew there was some fuel in the tank.
I poured more fuel in the tank but still only the same dribble???
I started up the air compressor, used a clean rag to block the inlet and blasted air into the tank. The dribble increased but still a dribble???
I crawled under the tractor and put the air nozzle into the line going back to the tank and gave it a shot of air. I heard a POP and i had diesel coming out all over me!!

With that, I used the vacuum pump and extracted all the fuel I could out of the tank. I even had a thick wire wrapped around the hose so I could direct the suction to the lowest point.
I put a half bottle of fuel treatment into the tank and let it drain through into a catch basin. I figured it would melt any "gum" in the tank. But I never saw what was actually clogging the line?

I was good most of the summer but it has recently started back. I am not a heavy user. Though 5 years old, it still has less than 100 hours. So it does sit idle for months at a time.
Not wanting to crawl under the tractor in 90 degree heat, I dumped a full bottle of diesel treatment into the tank (good for 35 gal) and am hoping it will melt the sludge that accumulated.

I only have one place to buy my diesel. It's automotive diesel.
 
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WI_Hedgehog

Well-known member

Equipment
BX2370 (impliment details in my Profile->About)
Apr 24, 2024
669
871
93
Milwaukee, Wisconsin, U.S.A.
@Springer : I'm not a snot-blob expert...but here goes: Do you fill the fuel tank after use, before the tractor sits?

Air expands/contacts with temperature changes and will draw in moist air that condenses leaving water behind when the air expands. The diesel/water separation layer is where algae grows, meaning the growth problem isn't immediately obvious. Keeping the tank full of fuel means less air-condensation-water-biofilm, and with addition of an algaecide a clean tank should usually remain in good shape (from what I read here on OTT).

I read BX are pretty finniky, and apparent moisture condensation in my own tank reflected that this past winter. After more reading here I now keep the BX topped off (not every day, just when it's going to sit a week or more).
 
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Russell King

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Lifetime Member

Equipment
L185F, Modern Ag Competitor 4’ shredder, Rhino tiller, rear dirt scoop
Jun 17, 2012
6,506
2,127
113
Austin, Texas
What is “diesel treatment “?

Some kill biological growth and others do NOT. Some can be strong concentrations in the fuel, others can NOT be used in high concentrations.
 
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