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53 Merc. will only idle ?
  • hot428ford
    Posts: 4Hitchhiker
    Flathead will start great , If you give it any gas it falls on its nose ? Had the carb rebuilt & added a electric fuel pump but still falls down ?? Help..
  • buddycarb
    Posts: 1Hitchhiker
    hot428ford wrote:
    Flathead will start great , If you give it any gas it falls on its nose ? Had the carb rebuilt & added a electric fuel pump but still falls down ?? Help..



    Check Timing, Check Vacume,make sure Carb Pump is pumping enough fuel.
  • Ol racerOl racer
    Posts: 1,688Platinum Member
    Sounds like worn 'accelerator pump' in carb... Check by looking down the carb with motor off. You should see a squirt of gas when opening the throttle.