2000 Sportster 883

Discussion in 'Engine, Fuel and Exhaust' started by mudbugman, Jun 16, 2013.

  1. mudbugman

    mudbugman New Member

    Just bought the bike and it floods after cranking but carb does not run over. Can turn off the fuel valve and it will straighten up some but still floods until its out of fuel all together. I have replaced the vacuum diaphragm in the top, the accelerator pump diaphragm, I have cleaned and cleaned, adjusted the float, can there be a electrical issue? help.. Bike only has 3900 miles.
  2. 89stroker

    89stroker Active Member

    Have you replaced the spark plugs? That may be a good place to start as plugs are probably fouled.
  3. Breeze3at

    Breeze3at Well-Known Member

    Is this only an idle problem, can the bike be ridden? Have you adjusted the idle air mix on the side of the carb.? How about the pilot air screw next to the float bowl under the carb.? Did you check the size of the pilot jet when you had the bowl off?
  4. fin_676

    fin_676 Experienced Member Staff Member Moderator Contributor

    The most common problem in a carb of this age would be the rubber tip on the float needle going hard and failing to seal however the fuel should then go down the overflow tube in the float bowl however if it was plugged then the fuel would flow up through the jets and downhill through the manifold into the cylinders
    Jets being too large or the enricher not closing correctly could also cause excess fuel in the cylinders
    A wee bit more info on jet sizes would be informative
    Put a short length of clear plastic tube on the float bowl drain secure the plastic tube against the side of the carb open the float bowl drain screw and the fuel tap on the tank you will now have a visible display of the depth of fuel in the float bowl it should be about 2 or 3 mm down from the float bowl gasket any more than that then more float bowl investigation required