Tractor turns over but won’t start

djm9200

New member

Equipment
Kubota B2650
Aug 5, 2026
5
2
3
Michigan
After letting the glow plug do its thing, when I try to start it it just clicks a bunch, briefly tries to start and goes back to clicking. Battery shows 12 volts with a multimeter. What can I check next? Thanks! B2650
 

MapleLeafFarmer

Well-known member

Equipment
Lots incl. B and L kubotas
Dec 2, 2019
1,163
1,156
113
E.
A quick and easy first check would be for fuel flow. Try to find your air bleed bolt around the fuel filter or injection pump. With the key on accessory loosen the bleeder. Are you getting a clean flow with no bubbles?

Is it cranking over quickly? 12 volts at the battery is low IMHO
 

djm9200

New member

Equipment
Kubota B2650
Aug 5, 2026
5
2
3
Michigan
A quick and easy first check would be for fuel flow. Try to find your air bleed bolt around the fuel filter or injection pump. With the key on accessory loosen the bleeder. Are you getting a clean flow with no bubbles?

Is it cranking over quickly? 12 volts at the battery is low IMHO
I have video of what it’s doing, but not sure how to upload it. I’d say it is quickly, then tries to start for a split second before clicking again
 

djm9200

New member

Equipment
Kubota B2650
Aug 5, 2026
5
2
3
Michigan
A quick and easy first check would be for fuel flow. Try to find your air bleed bolt around the fuel filter or injection pump. With the key on accessory loosen the bleeder. Are you getting a clean flow with no bubbles?

Is it cranking over quickly? 12 volts at the battery is low IMHO
So, I jumped it and it started. Guess the battery might be the issue…..
 
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djm9200

New member

Equipment
Kubota B2650
Aug 5, 2026
5
2
3
Michigan
Yep, time for a new one, it sounds like. But, I'd check to make sure it is charging before throwing a battery at it.
I ran it for around twenty minutes, shut it off and it restarted. I’m gonna go back out later and see if it starts again. Appreciate ya!
 
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Blue2Orange

Well-known member

Equipment
BX2380 with LA344S & QH05. SB1051. SG0554. BB1248. RB0560, Vassar dirt bucket
Apr 3, 2025
422
294
63
Bayview Township
My stock answer. Load test the battery after charging. Just because it reads fully charged with a multimeter under no load doesn't mean the battery is good condition. Voltage sag may drop it significantly if the battery is not healthy. Might start in warm conditions, but then on the first cold day. Zilch. Increase internal resistance with the cold. Not enough watts to turn the motor on.

Unsure if true. Was told running a marginal battery puts more stress on your alternator. If you are like me where the tractor sits for long periods of time unused. Consider a battery maintainer/charger. Quality charger cost is more than offset by the extra life span of the battery.

Side note. A friend who use to work for Ford as an electrical engineer noted the minimum spec for the battery installed or as he commented, more like the maximum spec for a battery was one that could sit 30 days and still start the vehicle. On day 31 it doesn't :).
 

djm9200

New member

Equipment
Kubota B2650
Aug 5, 2026
5
2
3
Michigan
My stock answer. Load test the battery after charging. Just because it reads fully charged with a multimeter under no load doesn't mean the battery is good condition. Voltage sag may drop it significantly if the battery is not healthy. Might start in warm conditions, but then on the first cold day. Zilch. Increase internal resistance with the cold. Not enough watts to turn the motor on.

Unsure if true. Was told running a marginal battery puts more stress on your alternator. If you are like me where the tractor sits for long periods of time unused. Consider a battery maintainer/charger. Quality charger cost is more than offset by the extra life span of the battery.

Side note. A friend who use to work for Ford as an electrical engineer noted the minimum spec for the battery installed or as he commented, more like the maximum spec for a battery was one that could sit 30 days and still start the vehicle. On day 31 it doesn't :).
Appreciate the feedback! Will get a maintainer on it in the future.
 

Blue2Orange

Well-known member

Equipment
BX2380 with LA344S & QH05. SB1051. SG0554. BB1248. RB0560, Vassar dirt bucket
Apr 3, 2025
422
294
63
Bayview Township
Being a cheapo I tend to keep batteries until I know I'm tempting faith. After fully charging I just connect the load tester when I suspect a new battery might be needed. That and a maintainer/charger has limited the number of batteries replaced. Total of three including the original battery over 25 years on the previously owned tractor. The 3rd was replaced a few months before I traded in the tractor for the BX in April of '25.. Load test revealed that the 2nd battery might not make it through the winter.

Using the Norco Genius 5 on the BX since day one. Bit overkill. The Genius 1 would have been adequate. Sale price made it close to G1. Charger and maintainer that doesn't overcharge your battery. Doesn't draw many watts when in maintaining mode.
 
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