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Kawasaki 6.5hp smokes at startup...sometimes???

Discussion in 'Mechanic and Repair' started by dalel20, Jun 25, 2008.

  1. dalel20

    dalel20 LawnSite Member
    Messages: 28

    My toro commercial with a Kawasaki FJ180AV 6.5 hp motor smokes at startup, occasionally? My nephew normally runs it while I trim and he told me after about the 4th dump it smokes so bad you can barely see the mower it does stop after awhile though. he loves this mower. It totally kicks the **** out of my HRX. Any ideas. I use 10W-30 Valvoline. Outside temp doesn't seem to matter anywhere between 50-80 deg. I know very little about this machine. We picked it up on the street corner during spring cleanup week!!!! So I have a little wiggle room as far as repairs. I am a fairly decent small engine mechanic so feel free to fire away. Will trade advice on Bobcat mini-excavators.
  2. SLR

    SLR LawnSite Gold Member
    Messages: 3,210

    Blue,Black or White smoke?
  3. dalel20

    dalel20 LawnSite Member
    Messages: 28

    Blue and white sorry
  4. Fisher40037

    Fisher40037 LawnSite Member
    Messages: 36

    No red??

    Seriously, some dirt under the carb needle, or a bad needle can leak off sporadically, dumping fuel into the intake, and on some engines, make its
    way to the crankcase oil. Once to the oil, which also makes the crankcase
    overfull, and the excess gets burned off.
    Smell the dipstick, if it smells gassy, then I would look in the carb.

    Also, if the engine is an OHV, the head gasket, starting to fail, can
    pressurize the crankcase, and force oil mist into the intake. It can be on and off at the onset....

  5. mowermankevin

    mowermankevin LawnSite Senior Member
    Messages: 270

    Dalel, First off welcome to Lawnsite, it's without question the best place for answers. The FJ is one of the worst, cheapest, poorest designed P.O.S. I've ever seen put on Toro's, Exmarks, whatever... I've worked on so many of these that it's not unusual to rebuild 4 a weekend. What your describing sounds like a bad head gasket, cracked head or valve guide, all 3 which I had last weekend. You may not like the Honda ($100 more) but I'm tired of the crap Kawa is building, so even if the Honda doesn't have an oil filter, they are holding up better than Kawa's
  6. jkason

    jkason LawnSite Senior Member
    Messages: 546

    Blue smoke is oil, white smoke is oil residue burning out of the muffler. CHECK YOUR OIL LEVEL!!

    If you are going to check for the head gasket, get a new one first - they are NOT reusable.
    if it was the gasket, that should take care of the problem, but I would switch to a straight 30-wieght oil (it will burn less).

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