GF1800e Electrical Issues

elip001

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Equipment
Kubota GF1800e
Mar 12, 2026
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0
1
Michigan
This is my first time posting here so I figure some background is due. I bought a Gf1800e about a year ago in rather rough shape so I anticipated problems. But in the first month of ownership I had a catastrophic engine failure that ultimately led to me having to buy a new block and fully rebuild the engine.

Now I have the block back in and the engine turned over fine but my battery didn’t have enough juice to get her moving so we charged it and upon attempting start again my fusible link burnt up on the wiring harness… I am pretty adamant about taking pictures but I admit this was not my finest work.

There is a starter relay that is not in any wiring schematic that I may have put the power wire straight to ground. My only problem is, that wire should be connected to the switch but I in no way can see where I would have had it connected, as well as I failed to image it.
Is there anyone out there that may have advice or possibly the same mower and could send me images of the wiring harness side of motor. Thanks in advance.
 

North Idaho Wolfman

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Go to Kubotabooks.com and download the GF operators manual, it has the wiring diagram in it.
 

Hugo Habicht

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A lot of people add a relay near the starter to avoid the fairly large solenoid currents through the start switch. This may explain that it's not in the schematics.

The start switch wire goes to the coil, other coil side to ground. The battery cable is going to the common contact of the relay and the solenoid is connected to the NO contact.
 
Last edited:

elip001

New member

Equipment
Kubota GF1800e
Mar 12, 2026
2
0
1
Michigan
A lot of people add a relay near the starter to avoid the fairly large solenoid currents through the start switch. This may explain that it's not in the schematics.

The start switch wire goes to the coil, other coil side to ground. The battery cable is going to the common contact of the relay and the solenoid is connected to the NO contact.
So I have a wire diagram and maybe I’ll post it later today but the relay that is on the mower has PIN 85 and 86 flipped based on what I can tell, all diagrams of that relay are opposite of how mine is wired. Would this matter? I can't imagine so because it ran fine prior to pulling the engine. Just trying to rule out some culprits still.