17hp kawasaki plug goes bad???? help SOS

Discussion in 'Mechanic and Repair' started by ashs inc, Jun 7, 2007.

  1. ashs inc

    ashs inc LawnSite Senior Member
    from alabama
    Posts: 595

    hey guys I want to first of all say a big thank you for all the help you have been on this mower. I got the gas from leaking from the carb. now my problem is the left plug keeps fouling out. It will run for about 15 mins then fouls out and starts missing and skipping and running like crap. thanks again
     
  2. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024

    Is the plug dry and sooty looking ?

    Are you replacing the plug or just cleaning the same one and re-installing ?

    Does that cylinder have good spark ?

    There are two possibility's, The coil could be weak on that cylinder or the valves could need adjusting.

    The use of a multimeter other than the Kawasaki may result in slightly different readings but as long as all test are close to spec and not WAY off it should be just fine.

    [​IMG]


    Valve adjustment procedure;

    [​IMG]
     
  3. ashs inc

    ashs inc LawnSite Senior Member
    from alabama
    Posts: 595

    the plug was a little wet looking i think. it might have been sooty. It has pretty good spark. I got a spark plug tester hook it up to the plug boot and clip it to the engine and crank. It will run but run like crap but you can see the spark. When i hook the plug tester up to the other plug it wont crank at all because the other plug is fouled out. I can put a new plug in and it will run for a few minutes then foul out.

    THANKS RESTRO ROB YOUR THE MAN
     
  4. ashs inc

    ashs inc LawnSite Senior Member
    from alabama
    Posts: 595

    ok the plug is real sooty looking. i have gone thru 3 plugs. whats the deal?? is it the valves???? thanks for you help!
     
  5. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024

    Since you have already been through the carb and only one cylinder is fouling that kind a rules out the carb, You have checked spark and that appears fine and installed different plugs so those things could be ruled out.

    For no longer than it takes I would check the valve Clarence on both cylinders to rule that out.
     
  6. ashs inc

    ashs inc LawnSite Senior Member
    from alabama
    Posts: 595

    restorob I am by no means a mechanic. checking the valves scares the crap out of me. what is all involved in doing this? where do I am start? take the head off?
     
  7. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024

    Can you not see this procedure I posted in my second post ?

    The heads do not have to be removed to adjust the valves.

    The only above average tool you need is a set of feeler gauges and they are cheap from any auto parts store.

    This gives step by step de-structions [​IMG]

    If you feel un-comfortable doing it contact your local shop and let them do it, It only takes around a half hour or less.


    [​IMG]
     
  8. ashs inc

    ashs inc LawnSite Senior Member
    from alabama
    Posts: 595

    restrorob. got a questions for you. what would cause my valves to need to be adjusted?
     
  9. heritage

    heritage LawnSite Bronze Member
    Posts: 1,249

    Wear of the valve face/seat will take up lash on the rocker arm adjustment.

    Pete D.
     
  10. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024

    Just as Pete explained, Along with wear on the cam lobes and tappets.

    Kawasaki recommends checking/adjusting valves every 300 hrs. I'd be willing to bet yours have never been checked/adjusted, Which is all the more reason to check them since you don't know the history of this unit.
     

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