fc420v need help bad

Discussion in 'Mechanic and Repair' started by mschwab, Apr 9, 2010.

  1. mschwab

    mschwab LawnSite Member
    Posts: 2

    Hello all i have been reading here a lot and now i need some help.

    So i have the good motor of fc420v. When the motor is at high rpm it running bad and back smoke like the choke is on. I know it is not things i have replaced

    plug
    oil
    gas
    needle and seat
    fuel filter
    igniter
    check valve adjustment
    compression is at 90


    If any one has any ideas pls let me know
     
  2. rotti1968

    rotti1968 LawnSite Member
    Posts: 169

    You have all of the above replaced , stupid question did you do the air filters also ? Clogged air filters will do this .
     
  3. mschwab

    mschwab LawnSite Member
    Posts: 2

    yes i did replace
     
  4. rotti1968

    rotti1968 LawnSite Member
    Posts: 169

    Its starving for fuel not getting from the tank,clogged line,clogged jet in carb etc.
     

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