SCAG NOT Starting

Discussion in 'Mechanic and Repair' started by mwsavga, Aug 6, 2011.

  1. mwsavga

    mwsavga LawnSite Member
    Posts: 5

    I currently have a 3yr old SCAG 48V with a 19HP FH580V engine. Until today no problems. I went to start the engine this morning, nothing. I jumped the battery it run fine for a few lawns. Now it will not turn over at all. I put a new battery in, still nothing. The engine is not seized it spins freely. I turn the ignition on it sounds like power is going through the system. But im lost! Anybody have anything for me?

    Marcus
     
  2. Snyder's Lawn Inc

    Snyder's Lawn Inc LawnSite Platinum Member
    Posts: 4,541

    You check all saftey switches
     
  3. mwsavga

    mwsavga LawnSite Member
    Posts: 5

    Posted via Mobile Device
     
  4. mwsavga

    mwsavga LawnSite Member
    Posts: 5

    I made they were all in a closed position. I'm wondering if oil is an issue. I have a small weeping leak near the drain line. One of my workers has been adding oil for a few weeks. Problem is its 20W-50. What you think?
    Posted via Mobile Device
     
  5. Snyder's Lawn Inc

    Snyder's Lawn Inc LawnSite Platinum Member
    Posts: 4,541

    So does it turn over but doesnt fire up you are saying
    Or you saying turn key and its doesnt do a thing
     
  6. mwsavga

    mwsavga LawnSite Member
    Posts: 5

    Turn the key and it does not do anything. I pulled the plugs and turned the motor via the flywheel. Its not seized.
    Posted via Mobile Device
     
  7. steve4mc

    steve4mc LawnSite Member
    Posts: 22

    MWsavga:
    I'm assuming when you say you checked the switches that you visually checked them. Now it's time to electrically check them. Put your ohmmeter on the connections and work the switch manually. Does the ohmmeter read zero? When they go bad, they look closed but the electrical connection isn't there. And it is a pretty common thing for them to go bad especially the one under the seat. THe good news is that they aren't expensive and available on the aftermarket.

    THe other thing I would do is to manually jump the starter to see if it is a starter issue. YOu should have two wires going to the starter. The big red one is hot (12V) all the time and the smaller one is hot when you turn the key on. You could check to see if you are getting 12V at the smaller wire when you turn the key on but it sounds like you aren't. If you jumper the 12V from the big wire to the smaller wire (be careful) and it turns over then you aren't getting 12V to the starter from the switch. IF it's like the other Scags I have, you have an interlock module that takes the inputs from all of the switches and puts out voltage to the starter.

    Hope this helps and let us know what you find.
     
  8. mwsavga

    mwsavga LawnSite Member
    Posts: 5

    The starter was not engaging. I tapped it with a hammer now its doing fine. Guess ill start pricing starters.
    Posted via Mobile Device
     
  9. topsites

    topsites LawnSite Fanatic
    Posts: 21,654

    Try replacing the starter solenoid first, I'm really surprised nobody else
    has mentioned it, unless that mower doesn't have one..,
     
  10. orourke15

    orourke15 LawnSite Member
    Posts: 29

    I agree with topsites, check the solenoid first.
     

Share This Page