How to Adjust the Carburetor on a Poulan Pro Weed Eater Model #PP446ET

The Poulan Pro model No. PP446ET is a pruner can be converted into an edge or brush trimmer. The 31-cc engine that powers the PP446ET uses a small carburetor to feed fuel into its combustion chamber. As the Poulan ages, the vibration of the engine and basic wear-and-tear can cause the idle to increase or decrease. If the engine gets to the point of stalling on idle or the trimmer head moves at idle, you need to adjust idle screw on the Poulan Pro's carburetor.

Workbench
Flat-head screwdriver

Instructions

- 1
  Prime the carburetor by pressing the priming bulb six times, if the engine is cold. Turn the start lever to the "Start" position.
- 2
  Pull the starter rope repeatedly until the engine starts. Allow the engine to run for about five seconds. Pull the throttle trigger fully to disengage the start system. If needed, hold the throttle trigger to keep the engine running.
- 3
  Set the Poulan Pro on a workbench, with the trimmer head suspended in the air.
- 4
  Locate the idle adjustment screw -- the slotted screw on the right side of the engine. Adjust the idle by turning the screw with a flat-head screwdriver -- clockwise to increase the engine speed or counterclockwise to decrease the speed -- until the engine idles without the throttle trigger pulled or the trimmer head moving.
- 5
  Turn the starter lever to the "Off" position.

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