M6060 loses power/stalling

BillyC

New member

Equipment
Kubota M6060
Sep 30, 2024
2
1
3
North Florida
My M6060 is losing power when mowing after about 20 mins of the pto being engaged. I pulled the fuel line off coming from the tank to the separator and didn’t have much flow. I shot air into it and got good flow. Still didn’t work. Drained the tank, changed the filter pulled the separator off and cleaned it. No luck. Someone told me that it’s algae in the tank. It runs great until I put it under a load. I shut it down for about 30 minutes and it runs great as long as I don’t put it under a load. Any help would be greatly appreciated. Also is there anything I can put in the tank to kill the algae. If that’s what it is? Thanks
 

JimmyJazz

Well-known member

Equipment
B2601
Aug 8, 2020
1,224
742
113
Pittsburgh, Pa
My M6060 is losing power when mowing after about 20 mins of the pto being engaged. I pulled the fuel line off coming from the tank to the separator and didn’t have much flow. I shot air into it and got good flow. Still didn’t work. Drained the tank, changed the filter pulled the separator off and cleaned it. No luck. Someone told me that it’s algae in the tank. It runs great until I put it under a load. I shut it down for about 30 minutes and it runs great as long as I don’t put it under a load. Any help would be greatly appreciated. Also is there anything I can put in the tank to kill the algae. If that’s what it is? Thanks
Algicides have been discussed here previously you might want to try using the search feature. I believe most auto parts places and probably Amazon carry the stuff.
 

Mark_BX25D

Well-known member

Equipment
Bx25D
Jul 19, 2020
1,788
1,301
113
Virginia
Someone told me that it’s algae in the tank.

Did that someone look into your tank to make that diagnosis? Was a fuel sample taken? Is that anything other than a guess?

Yes, it certainly could be algae in your tank. Might just be a leaf floating around that blocks your tank's outlet. Might be a few things.

You do have classic fuel starvation symptoms, so the fuel system is certainly the first place to look, including checking to see if you have algae in your fuel.

I don't know your particular tractor, but some of these beasts have two fuel filters. You might want to check on that.
 
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Tom Joad

New member

Equipment
Kubota M6060HDC
Sep 29, 2024
7
2
3
Louisiana
My M6060 is losing power when mowing after about 20 mins of the pto being engaged. I pulled the fuel line off coming from the tank to the separator and didn’t have much flow. I shot air into it and got good flow. Still didn’t work. Drained the tank, changed the filter pulled the separator off and cleaned it. No luck. Someone told me that it’s algae in the tank. It runs great until I put it under a load. I shut it down for about 30 minutes and it runs great as long as I don’t put it under a load. Any help would be greatly appreciated. Also is there anything I can put in the tank to kill the algae. If that’s what it is? Thanks
BillyC, I am having a very similar problem with my M6060, the only difference is the length of time under load before the condition occurs. I can only run approx. 7 minutes before it starts losing power. After idling the engine, it runs rough (likely missing). After it rests for 30 minutes or so it will perform again for 7 minutes or so. Runs great as long as it's not under a load. Let me know if you find you issue and I will share what I find as well. Thanks.
 

Mark_BX25D

Well-known member

Equipment
Bx25D
Jul 19, 2020
1,788
1,301
113
Virginia
Check your fuel delivery to the fuel shut off valve. Disconnect the line there, get a container (a small glass jar will do) and turn your key on to see how much flow you have.

Let us know!
 

BillyC

New member

Equipment
Kubota M6060
Sep 30, 2024
2
1
3
North Florida
BillyC, I am having a very similar problem with my M6060, the only difference is the length of time under load before the condition occurs. I can only run approx. 7 minutes before it starts losing power. After idling the engine, it runs rough (likely missing). After it rests for 30 minutes or so it will perform again for 7 minutes or so. Runs great as long as it's not under a load. Let me know if you find you issue and I will share what I find as well. Thanks.
BillyC, I am having a very similar problem with my M6060, the only difference is the length of time under load before the condition occurs. I can only run approx. 7 minutes before it starts losing power. After idling the engine, it runs rough (likely missing). After it rests for 30 minutes or so it will perform again for 7 minutes or so. Runs great as long as it's not under a load. Let me know if you find you issue and I will share what I find as well. Thanks.
I haven’t got it figured out yet. It just seems to me that when I shut it down and everything cools off it will run fine for 20 mins. and do it again. It’s so frustrating.
 
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Libertyms

New member

Equipment
M6060HDC
Dec 15, 2024
1
0
1
Louisiana
My M6060 is losing power when mowing after about 20 mins of the pto being engaged. I pulled the fuel line off coming from the tank to the separator and didn’t have much flow. I shot air into it and got good flow. Still didn’t work. Drained the tank, changed the filter pulled the separator off and cleaned it. No luck. Someone told me that it’s algae in the tank. It runs great until I put it under a load. I shut it down for about 30 minutes and it runs great as long as I don’t put it under a load. Any help would be greatly appreciated. Also is there anything I can put in the tank to kill the algae. If that’s what it is? Thanks
Check the fuel water seperator and clean as required. Replace the spin on filter that connects to the fuel lift pump. Change the fuel lift pump. It’s not expensive and easy to change (10mm open end, something to release the fuel hose spring clamp.) Algae or contamination passes through the fuel lift pump first and can damage it. I did all of the above including changing pump for less than $100 and it only took a couple hours. I do not have much run time on the tractor since the change but it runs much better.
 

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