Kawasaki FH680V - has fuel in oil - HELP!

Discussion in 'Mechanic and Repair' started by LawnTwister, May 20, 2007.

  1. LawnTwister

    LawnTwister LawnSite Member
    Messages: 4

    I need some expert opionions.

    I have the Kawasaki FH680V-BS13 engine on a Wright Sentar. The motor is smoking white smoke, has oil leaking from the top of the motor under the fly wheel and the oil looks milky, like it has fuel in it.

    What do I need to do with this engine. It only has 500 hrs on it. Should I buy a replacement and if so, which one? I cannot find an exact motor with the BS13 in the code. Or should I have it rebuilt?

    Thanks in advance.
  2. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    How many hours are on this unit ?

    Has it been well maintained ?
  3. dutch1

    dutch1 LawnSite Silver Member
    from Jayhawk
    Messages: 2,249

    Does the dipstick show that the oil level is over filled? If the oil does smell gaslike then you are likely getting gas into the crankcase via a poorly seating inlet needle in the carb or you could have some trash in the needle preventing it from seating.

    Before you consider replacement/rebuild clean out the carb and while you have it apart install a new inlet needle. If you have the tools it is advisable to pressure test the carb to make sure the needle and seat will hold at least 3 psi. Drain the engine oil and replace then see what happens.

    The white smoke you're seeing is most likely oil burning as a result of being over filled.

  4. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    Missed the hours. :hammerhead:
    Before you go through the carb. as Dutch suggested above, Remove the flywheel cover then grab the flywheel and try rocking it side to side.

    If it does in-fact move side to side the top bearing surface is worn out and is non-replaceable.

    If it's snug then replace the top seal and move to the carb.
  5. LawnTwister

    LawnTwister LawnSite Member
    Messages: 4

    I took the flywheel cover off and was able to get a little movement out of the flywheel, like a 1/16" - 1/8", just a little movement. This is where my oil leak is coming from, and it is leaking pretty good.

    The motor was service every 50 hrs but nothing other than that.

    The oil does smell like gas and it gets that milky color.

    I am going to run it over to the shop this morning and let them give me an estimate on repair and or replacement.

  6. khouse

    khouse LawnSite Bronze Member
    Messages: 1,465

    The milky color indicates water in the oil. But I wouldn't know how that got in there. Maybe the oil is running out of the top and rain is mixing with it there. Is there the same milky oil on the dipstick? If you have a pulse fuel pump the diaphram could be leaking causing fuel to enter the crankcase.
    Why the so called commercial engines don't have crank bearings is crazy.
  7. themowerman

    themowerman LawnSite Senior Member
    from NJ
    Messages: 298

    Check what the others have said. The seal could have been taken out if the oil level was too high due to fuel dilution. When you have the carb apart for inspection make sure you replace the little o-ring when you reassemble the float assy. Those o-ringsget distorted.
  8. LawnTwister

    LawnTwister LawnSite Member
    Messages: 4

    Got back from a Kawasaki dealer and it's almost the same to fix it as it was to order a new one. I ordered a new Kawasaki FH680V with heavy duty air cleaner. Thanks for everyones help. Now onto the hydro-gear pumps.

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