Stihl 029 Farm Boss froze up?

Discussion in 'Mechanic and Repair' started by rvincent, Mar 25, 2007.

  1. rvincent

    rvincent LawnSite Member
    Posts: 19

    I was up at the cabin this weekend cutting firewood with my new saw. Cut awsome for about 2 hours, then all of the sudden, it just froze and shut off right away. The chain turns, but the flywheel (pullcord) wont move. I took it apart a little and saw though the spark plug hole the piston was intacked, and it moved up then stopped. It will move up, then stop, move down then stop. I was moving it by turning on the clutch. It sounds like when it stops its hitting metal inside.

    Did a wrist pin move out a little? Any other ideas? Anyone have this problem before.
     
  2. khouse

    khouse LawnSite Bronze Member
    Posts: 1,465

    was it brand new? what type and mix ratio were you using?
     
  3. rvincent

    rvincent LawnSite Member
    Posts: 19

    it was used 2-3 times for an hour or so each time. I was using a 50:1 mix (stihl oil, 89 oct gas)
     
  4. khouse

    khouse LawnSite Bronze Member
    Posts: 1,465

    I have seen the cranks break if the chain sprocket is worn badly where the chain pops over a cog. Was it making a poping/jerking noise? After inspecting and removing the clutch and you still have issues - you'll have to tear it down to find the problem.
     

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