2008 Cub Cadet 173cc lawn mower will only run with choke on

Discussion in 'Mechanic and Repair' started by dansikes, Sep 20, 2009.

  1. dansikes

    dansikes LawnSite Member
    Messages: 8

    I have a 2008 Cub Cadet Lawnmower model# 12a-18mz256. It will only run with the choke on. Once I close the choke (after it warms up) the engine sputters and shuts off. Do I need to replace the carb or is this fixable by kitting the carb? It is also fairly hard to start. Any help would be much appreciated.
  2. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    Yes, Either that or just cleaning the main jet......
  3. DT Lawn Care

    DT Lawn Care LawnSite Senior Member
    Messages: 850

    Don't want to be a smartass, but "closing" the choke is choking it, "opening" the choke is taking it off choke, FYI

    As Restro said, try cleaning the carb, unless the gaskets and rubber are bad, you probably won't even need a kit.
  4. pugs

    pugs LawnSite Gold Member
    Messages: 3,024

    Would a kit even be available? This might be one of those MTD engines. I have not had any experience with them yet. I have some experience with the engines Powermate was using right at the end...and those have very few parts available for the engine.
  5. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    This is one of those MTD engines pugs and yes there is a rebuild kit part# 951-10868 available.....
  6. pugs

    pugs LawnSite Gold Member
    Messages: 3,024

    Cool, I will have to keep that in mind. We arent an MTD service center so we really havent seen any of those engines. Not sure how old they are now but guessing warranty would just be ending on some of the first ones out...I dunno.

    I know I needed a valve spring on a Powermate with a knock off Kohler/Yamaha engine on it...under warranty. Guy got a new pressure washer because the valve spring isnt available...LOL. I need to play with that sometime and make a spring work just for fun.

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