18 HP Briggs & Straton in a MTD No spark

Discussion in 'Mechanic and Repair' started by sefh, May 6, 2007.

  1. sefh

    sefh LawnSite Member
    Messages: 40

    Well I thought that I had a bad solenoid on my older (At least 15 years old) MTD and it was the starter. There is a green wire and red wire on the solenoid that I crossed when I put the solenoid on and the motor had alot of smoke (electrical) coming out of it. Now I can get the motor to crank but no spark. What do I have to replace now so I can get this to run. Thanks for the help.
  2. bgarr

    bgarr LawnSite Member
    Messages: 1

    disconnect the ground wire thats goes to the coil.if you have spark then you have a wiring problem.if not your coil is bad.
  3. sefh

    sefh LawnSite Member
    Messages: 40

    Where would I find that wire?
  4. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    If this is the "L" head engine (No model #'s posted) it will exit the flywheel cover with the plug wires.
  5. sefh

    sefh LawnSite Member
    Messages: 40

    I forgot the model of the motor at home. I will post it tonight.
  6. sefh

    sefh LawnSite Member
    Messages: 40

    I had another coil off a 16hp Briggs, so I replaced it with this one. I took the ground off both old and new and it didn't run on old but runs on new but now it won't shut off. So I bought a toggle switch and ran it to the ground and coil and it now shuts off. I know it is not the correct way but for a 15 yr old tractor I think it will work fine. The tractor has set for 2 years now and the mice got to some of the wires. So it runs and that is all that matters. Thanks for the help.

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