Kubota L3400 Vapor Lock???

[Clutch]

So another thought here....

Check your fuel shut off solenoid after running it and right after it quits. It's possible that the heat is causing it to shut the fuel off at your pump, and once it cools it works fine again.

Worth checking visually at least to see if that's why you are losing your fuel flow after a time.

 

[Tx Jim]

Many yrs ago I owned a M4900 that after operating for while would loose power. After performing many diagnostic procedures I consulted with my local Kubota dealer service manager who advised me to check for blockage in passageway in fuel water separator housing. I located after removing fuel shut-off valve from housing a clogged tiny screen on the end of fuel shut off valve inside the housing. Cleaned the tiny screen & engine operated much better.