SolarStallion 37 #1 Posted May 1 Anyone the part number for this type of solenoid on a 312-8? Thanks Share this post Link to post Share on other sites
OutdoorEnvy 1,473 #2 Posted May 1 Solenoids are pretty generic. Just check if it’s self grounding or has a ground wire going to frame and get the same kind. You can get both about anywhere. 2 Share this post Link to post Share on other sites
SolarStallion 37 #3 Posted May 1 It has the 2 heavy wires going up and down and 2 push on wires on each side. Share this post Link to post Share on other sites
Ed Kennell 36,110 #4 Posted May 2 Make sure your 25 amp fuse is making good contact with the fuse holder. We recently had two 312 no starts due to a bad contact between the fuse and holder. To test the solenoid, connect a jumper from the small wire on the solenoid to the positive post on the battery. This will bypass all the fuses, holders and safety switches. 1 Share this post Link to post Share on other sites
SolarStallion 37 #5 Posted May 3 (edited) Hi Ed, I did clean up the fuse and sprayed electric cleaner in the socket but still nothing. I did the jumper wire like you said. I have 2 small wires on this solenoid. One did nothing. One just sparked. The engine will start and run if I short out the 2 large wires. I did replace the solenoid with a different style one but still no start. The solenoid on now has 2 large wires up and down and 2 small wires are left and right. (See photo) The one I tried has 2 large wires and 2 small wires both left and right. Edited May 3 by SolarStallion Share this post Link to post Share on other sites
Ed Kennell 36,110 #6 Posted May 3 (edited) OK, you need to find the wiring diagram for your tractor. There are several safety switches on the starting circuit of these tractors. ie seat, PTO, neutral, parking brake. Here is one for the 1978 Tractor 1987 312-8 D&A TIPL Wiring SN.pdf - 1985-1990 - RedSquare Wheel Horse Forum Edited May 3 by Ed Kennell Share this post Link to post Share on other sites
squonk 39,168 #7 Posted May 3 What is the model no. of your tractor? Share this post Link to post Share on other sites
