Kaw 13HP Twin Cycl. Starts Hard

Discussion in 'Mechanic and Repair' started by ed2hess, Feb 25, 2013.

  1. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 13,079

     
  2. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 13,079

    Got back to the FH381V that wouldn't start without ether and had bad compression on one side. I measured the cyclinders with telescoping gauges 2.558" and I can't tell much. Going in to dealer. I don't want to clean up valves until expert tells whether new rings will help. I can't tell if wear is uneven...

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    This was side that had exhaust leaking.

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  3. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    Ed. Remove the top ring from the piston that had good compression..
    Insert it in the cyl bore it came out of...check the gap with a feeler gauge...
    Now...insert it in the other cyl bore ...measure the end gap again..it prolly won't change much..
    That v twin: is a short stroke engine...it ain't gonna have wavy bores...maybe scratches or grooves...
     
  4. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 13,079

    The gap measured .014" @.793 and 1.71"depth on good cyclinder and just about the Same on leaky cyclinder. I used top ring on good cyclinder on both. The bottom ring had crud in groove on leaking cyclinder but was not seized. Looked better on the good cyclinder.
     
  5. DXN1EL

    DXN1EL LawnSite Senior Member
    from TEXAS
    Posts: 466

    Did you bought the cheap engine?
     
  6. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 13,079

    no going to try to do a cheap rebuild on my Kaw...doing almost of the tear down and clean up of the heads.
     
  7. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    Looks like yur good to go...
    Deglaze the cylinders...clean up the valves and heads...
    Replace the rings and seals....get a few more years out of it...
    Its a piece of cake....
     
  8. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 13,079

    Got around to putting the heads together and one spring, retainer, and one collet shot in orbit. I cleaned out about 10% of the garage to find the parts.:clapping: I thought no way will I find them with shelfs of stuff and leaves on the floor and dirt, but got lucky.

    The collets are little buggers to get on compared to other engines I have worked on.

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    Added cardboard backboard to stop stuff. I have to get
    Sides all around.

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  9. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 13,079

    New rings and reworked heads still needed shot of ether to start.

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    I decided it had to be the carb but new one at $250 a no go. I had the originql carb and a used swap out. I finally figured out that when I cleaned the carbs I failed to get the main jet out. I only got seat out and shot carb cleaner in. The jet was not clean. DEBRIS was around the outside and could only be cleand by removing it.

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  10. all ferris

    all ferris LawnSite Bronze Member
    Posts: 1,307

     

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