Mx5100 hst won’t start

Dct1313

New member

Equipment
Mx5100
May 6, 2025
2
0
1
Alabama
My mx 5100 will crank but will not start. The fuel shut off solenoid is not getting power to it. I have replaced the solenoid and the relay and still won’t start. I can pull the relay off and put a jumper wire in the wiring harness and it’s fires right up. What else could be the problem?
 

NorthwoodsLife

Well-known member
Lifetime Member

Equipment
Kubota B7100(sold), Kubota LX2610 Cab
Oct 15, 2021
1,136
1,074
113
Wisconsin
Double check your wire connections to the relay. If that is solid... and confirmed...

Try another new relay.

If your wires are crossed you might have fried the relay.

If jumping past the relay solves your problem.... Just sayin'... it is the relay.

Check your fuses.
 

whitetiger

Moderator
Staff member

Equipment
Kubota tech..BX2370, RCK60, B7100HST, RTV900 w plow, Ford 1100 FWA
Nov 20, 2011
3,074
1,517
113
Kansas City, KS
You may very well have a failure in the OPS, which will not allow current to be sent to the relay coil. The relay can only close when it is told to.