B7800 Kubota not cranking

AlaskanMan

New member

Equipment
B7800 Kubota
Sep 29, 2025
1
0
1
Florida
2002 B7800 Kubota. Used yesterday and parked for the night. Next morning went to start and no crank. Usually have 2 red lights when I turn on the key. No red alternator light. Turn to next position and glow plug light comes on as normal. If I jump the starter the tractor starts and runs. Where do I start?
 

Mark_BX25D

Well-known member

Equipment
Bx25D
Jul 19, 2020
1,838
1,331
113
Virginia
Voltmeter.

Measure the voltage on the battery. It doesn't take much juice to light up a glow plug light.

Measure it running, too. Then we'll know if the alternator is working.