L3301 HST cranks, starts briefly then stalls

Joeb1

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Equipment
Kubota L3301
Feb 28, 2025
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Alabama
I’ve been through several threads and I don’t think I found the solution. I’ve cleaned the fuel/water, separator, and replaced the fuel filter. I have ensured there is no air in the system. I’ve confirmed that I have fuel going through the fuel pump. The tractor cranks, starts briefly, when I release the key back to the run position, it stalls.
 

North Idaho Wolfman

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L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
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Sandpoint, ID
On an older tractor i would say you have a Run solenoid / Fuel shut off solenoid issue.
But with a newer tractor that is computer controlled you can't have that issue.

If it is doing it rather consistently, My best guess, with limited information that we have, is you have a main switch issue, that is cutting power to the engine controls when the key is released from the start position.

One other possible odd scenario is that there is a safety switch issue that is keeping it from running, but that's a long shot because most of those safety switch issues should also keep it from cranking too.
 
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