Kawi 12.5HP Valve Job

Discussion in 'Mechanic and Repair' started by CT18fireman, Feb 28, 2007.

  1. CT18fireman

    CT18fireman LawnSite Senior Member
    Messages: 611

    Can anyone give me the steps for doing the valves on a Kawi mounted on a walkbehind? I know it can be done on the mower without major disassembly but I have forgotten the exact steps.
  2. khouse

    khouse LawnSite Bronze Member
    Messages: 1,465

    I would really recommend a service manual, Neway seat cutter, new valves and gaskets.
  3. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

  4. MowerMedic77

    MowerMedic77 LawnSite Bronze Member
    Messages: 1,164

    This part of your question is throwing me off, Do you want to perform a valve job or a valve adjustment? I guess I need more clarification:confused:
  5. CT18fireman

    CT18fireman LawnSite Senior Member
    Messages: 611

    It may just need an adjustment or may have bigger problems. Here is what I have. After removing the head I can see that the intake valve closes down tight on the compression stroke I cannot turn or move it. The exhaust valve appears to close then it actually opens just a bit on the compression stroke before closing just before TDC. However I can still spin the valve in the "closed" position so I don't think it is fully seating.

    Looking at the valves they look pretty good.

    My initial problem was hard cold starts. Once the motor started it ran great, quiet and made good power.

    I have done lots of motor work in years prior but mostly automobile and a few Briggs. I got the cover off to look at the springs. I will have to pick up a new compressor (any recommendations). So any help would be great.
  6. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    Click on the link I posted above and down-load the manual. Follow the steps for valve adjustment. When you see the exhaust valve open a little then close at TDC thats the compression release operating and normal.

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