Kaw smokin in one cyl

Discussion in 'Lawn Mowing' started by pjslawncare/landscap, Dec 9, 2004.

  1. pjslawncare/landscap

    pjslawncare/landscap LawnSite Bronze Member
    Posts: 1,410

    21 hp kaw, no warrenty left, low hours, runs good, no unusual noise, always maintained oil, no occurances ever and all of a sudden one cylinder is smoking fairly bad. Any ideas before I rip into her
     
  2. Travis Followell

    Travis Followell LawnSite Silver Member
    from KY
    Posts: 2,207

    How many hours? What color smoke?
     
  3. YardPro

    YardPro LawnSite Gold Member
    Posts: 3,563

    travis is right about the smoke color being important.
    black is fuel, grey/blue is oil.

    could be alot of things.
    valve stem seals,oil control rings
     
  4. pjslawncare/landscap

    pjslawncare/landscap LawnSite Bronze Member
    Posts: 1,410

    About 150 hours and blue/grey smoke (not good)
     
  5. rockhouse

    rockhouse LawnSite Member
    Posts: 42

    Have you checked the compression? If it's bad it's possibly a ring issue. If you have good compression it's probably a valve seal. You can change a valve seal without taking the head off by charging the cylinder with air (get the fitting at autozone) & then using a small valve spring compresser to gain access to the seal. Probably take about 30 minutes.

    Check the compression -- it will steer you in the right direction
     
  6. Travis Followell

    Travis Followell LawnSite Silver Member
    from KY
    Posts: 2,207

    It could only be a problem with the rings or valves. It is probibly a valve seal like said above and it is a good idea to check compression. If its low it could still be caused by valves or rings or both.
     
  7. richard coffman

    richard coffman LawnSite Senior Member
    Posts: 341

    could it be a reed valve gone bad?? check engine for air seepage around air filter or carb. what's the spark plug look like?? GOt a pic??
     
  8. rockhouse

    rockhouse LawnSite Member
    Posts: 42

    Vacuum leak doesn't cause smoke. Just poor idle. Weak valve spring would cause high rpm problems (miss) due to valve float. Due to the fact that only 1 cylinder is smoking it's probably going to be the valve seal. Check the compression anyway.
     

Share This Page