No Spark On Yamaha

Discussion in 'ATV / UTV' started by Tommy Kite, Apr 11, 2019.

  1. Tommy Kite

    Tommy Kite LawnSite Member
    Messages: 205

    I have a Yamaha Warrior 350XJ 1997 Model and it was given to me with no spark. I corrected some defects in the wire harness and bought a new solenoid and relays. I ordered a new rectifier because I have no spark with it plugged in but I have spark when I unplug it. I was told by the previous owner that they had no spark out of nowhere and replaced the stator. If this does not recover spark I will take a look at the stator. I tested it previously and the readings I got were a off from what I saw on another forum but I also saw that the regulator rectifer does not have any affect on the condition of a spark but a stator could. I am not sure but I would like some answers as to why I get spark with the regulator unplugged please. I will post updates when I get it on Saturday or monday.
     
  2. jchurch75

    jchurch75 LawnSite Member
    Messages: 5

    Deffinately sounds like your stator. I'm sure I'm late, just thought I'd chime in.
     
    hort101 likes this.
  3. OP
    OP
    Tommy Kite

    Tommy Kite LawnSite Member
    Messages: 205

    I bought a used stator but the screws stripped out in the holes holding the old one in. Been too lazy to mess with it. I will do it eventually.
     
  4. OP
    OP
    Tommy Kite

    Tommy Kite LawnSite Member
    Messages: 205

    Replaced it and I still have a no spark condition. Loosing hope here
     
  5. Walker56

    Walker56 LawnSite Fanatic
    Messages: 13,719

    Verify that your regulator is grounded sufficiently.
    I could not find a diagram for a 350XJ but I did find one for a Warrior 350 here https://wellread.me/yamaha-350-warrior-wiring-diagram.html. I am not sure if your schematic is the same.
    I would recheck your stator readings per a factory manual. I would also check the resistance of the source coil and pickup coil from a factory manual. The circuitry within the regulator could be causing an issue with one of the coils making the pickup coil unable to induce a signal. Study the schematic, you will see what I am referring to.
     
  6. OP
    OP
    Tommy Kite

    Tommy Kite LawnSite Member
    Messages: 205

    I have a factory service manual and I went through the procedure for testing no spark but it keeps referring to a connector on the main harness I do not have or cannot find. And my multimeter took a ****.
     
  7. Walker56

    Walker56 LawnSite Fanatic
    Messages: 13,719

    Look at the schematic. It will show you the connectors and the associated color coded wires. Maybe that can narrow it down for you
     

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