SCAG 36" - Problem!?!

Discussion in 'Mechanic and Repair' started by pgalardi, Sep 15, 2007.

  1. pgalardi

    pgalardi LawnSite Member
    from NJ
    Posts: 8

    I was mowing today with my SCAG 36" HYDRO and the motor just starting revving really high. I shut it down right away. As I started inspecting the mower, I took the engine oil cover off and pulled out the dipstick. I didn't have any oil in it. I got it started again, and it revved really high again. I played with the throttle, but it didn't slow down unless I put the choke on. I'm guessing that the missing oil was the problem, but if I play with the throttle adjuster near the motor/carb, I can get the right RPMs and the engine runs just fine. Any ideas what might have happened?
     
  2. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,023

    You didn't mention what engine this is but my guess would be the governor slung apart possibly due to lack of oil.
     
  3. pgalardi

    pgalardi LawnSite Member
    from NJ
    Posts: 8

    I should have mentioned the motor... it is a Kawi 14hp.
     
  4. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,023

    You can check the governor adjustment just to make sure the lever didn't move on the shaft;


    [​IMG]

    I have replaced 2 this year in these engines, And if you do open this engine remove the rod cap and check for any metal transfer/damage before closing it back up.
     
  5. pgalardi

    pgalardi LawnSite Member
    from NJ
    Posts: 8

    Do you think I should just replace the entire motor?
     
  6. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,023

    It depends on your funding situation, Since the engine was ran low on oil there is a good chance other internal engine damage ac-cured besides the governor.

    In most cases the rod and top crankcase bearing surface sustains the most damage, This would mean a complete tear-down inspection.

    Since Kawasaki does not offer short-block assemblies for their engines, In most cases it's better to replace the engine since there are so many discount engine warehouses around now.

    You can give the place below a call with all your engine numbers and they will be happy to give you a hand;

    http://www.smallenginewarehouse.com/

    Good Luck
     
  7. pgalardi

    pgalardi LawnSite Member
    from NJ
    Posts: 8

    but I want to try to repair the old one. Do you know of an online manual source for it?


    Thanks!
     
  8. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,023

    If you use the search feature on this site you can find one of my old post where a link for a PDF service manual was posted.

    I can no longer post them.
     

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