Starter motor problems

twigtree

New member

Equipment
F3680
Sep 2, 2023
1
0
1
UK
Hi all,

have recently replaced the starter motor on my f3680.

However the new one seems to be of a different design and only has a single post as opposed to 2 posts.

there is now no way I can see to connect the fuel stop solenoid to the starter. Is my only option to find the correct starters or is there a way around this

thank you for any help.

Old type and new type pictured below.

6FA687DE-2D6B-484A-B8B3-F5B365313855.jpeg
C147EFE8-DDA6-4F77-92A8-946C573581C2.jpeg
 

6869704x4

Well-known member

Equipment
L45TLB, 49 8N, 57 641, RTV-X1120D, Z422
Jun 29, 2011
320
418
63
SE, NM
I would try it on the big post that‘s inboard on the solenoid next to the block. That way it’ll be hot when starting which is how the old one was wired.
 

jaxs

Well-known member

Equipment
B1750HST
Jun 22, 2023
733
522
93
Texas
I would try it on the big post that‘s inboard on the solenoid next to the block. That way it’ll be hot when starting which is how the old one was wired.
I don't see an inboard and outboard post on new starter so until I do see both posts I reserve my answer. I'm thinking new starter requires the addition of a remote solenoid.
 

6869704x4

Well-known member

Equipment
L45TLB, 49 8N, 57 641, RTV-X1120D, Z422
Jun 29, 2011
320
418
63
SE, NM
Yeah, lets over complicate things by adding a solenoid:D
If twigtree can fish that ring terminal through through the dust boot on the inboard lug this would require no modification at all. Option B is to splice the wire onto the wire that energizes the solenoid when you hit start.
1698206237175.png
 

jaxs

Well-known member

Equipment
B1750HST
Jun 22, 2023
733
522
93
Texas
Why would the shut off solenoid need power when cranking?
It shouldn't but since electronics mfgring is a major part of Japan's economy Kubota uses as many wiz-bang figitbit electrical devices as possible to generate demand for after market parts and dealer repair. Fuel has been shut off for decades with a simple push/pull wire and this mower could be as well if owner chose to but that wouldn't sell parts.
 

Russell King

Well-known member
Lifetime Member

Equipment
L185F, Modern Ag Competitor 4’ shredder, Rhino tiller, rear dirt scoop
Jun 17, 2012
5,356
1,412
113
Austin, Texas
Why would the shut off solenoid need power when cranking?
Pulls the solenoid into the running position and then is held in that position by a separate coil in the solenoid. When key is released from the start position the pull coil is de-energized.