1. Can’t make it to the GIE+EXPO 2017?
    LawnSite brings the trade show floor to your fingertips with our new GIE+EXPO 2017 Sneak Peek video series debuting now in the Lawn Mowing forum.

    Dismiss Notice

Fc420v puffing white smoke

Discussion in 'Mechanic and Repair' started by restepp25, Nov 3, 2011.

  1. restepp25

    restepp25 LawnSite Member
    Messages: 59

    Got a older exmark hydro viking with kaw fc420v. Read a lot of stuff on here and have some questions. It tries to start, fires for a few seconds then puffs white smoke like its flooded. I took the carb off and cleaned it really well, but still same thing. People have said it could be valve issue or seals on the float valve seal letting too much gas into the bowl. What do you guys think? I found the manual on here and feel confident in being able to adjust valve clearance.
  2. jsslawncare

    jsslawncare LawnSite Bronze Member
    Messages: 1,673

    Does it have too much oil in it? My FC420 does that right after oil changes because I can never put the right amount back in.

Share This Page