1. Missed the live Ask the Expert event?
    Catch up on the conversation with Ken Hutcheson, President of U.S. Lawns in the Franchising forum plus sign up to receive a FREE eBook on how to grow your landscape business.

    Dismiss Notice

Kawfc420v will not restart when hot

Discussion in 'Mechanic and Repair' started by scagboy, Jul 28, 2005.

  1. scagboy

    scagboy LawnSite Member
    Messages: 1

    Mower starts when cold but will not restart when hot. No problems for the first 300 to 400 hours on engine (this was a replacement 420) on a scag SWZ, we have switched stater and coil off the original engine that had a bad crank, still have same problem, starts when cold-wont restart hot & if left idling it will stall. We have fiddled with all the safteys on the mower and dosent seem to be that. We even added the square piece to the side ( some call it the ignitor)The new replacement engine did not have this piece, but either way-same results. Engine will start dead cold but will not restart until it has cooled for quite a while. A real nightmare out on the job. Appreciate any helpful advice. Mower repair shops in our area are NOT an option. They are expensive ($65.00 an hour) and our mechanic is generally more experienced.
  2. Lawn Masters

    Lawn Masters LawnSite Senior Member
    Messages: 850

    is the spark plug(s) tight? that might be the problem.
  3. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    Have you checked the valves ? They should be checked and adjusted every 300 hours, If not they should be set at 0.006 both intake and exhaust.

Share This Page