Tool to Safeguard a Poulan Carburetor to High and Low Settings
A Poulan chain saw carburetor has one feature to adapt with a tool to increase or decrease the idle speed. The carburetor is set properly at the factory, but adjustments can be necessary if the motor runs badly, dies or runs at a high rate. Engines that operate at too high of a rate can be destroyed or operate inefficiently. Engines that operate at a slower rate than normal will stall and stop, then require restarting often.
Carburetor Work
A Poulan chain saw carburetor operates in precisely the same manner for a carburetor on an automobile or other smaller engines. The adjustments to it make the fuel mixture richer, by adding additional fuel and oil into the atmosphere mixture, or leaner, by reducing the fuel and oil mixture ratio to atmosphere.
Idle Rate Issues
Adjustments will need to be made to your carburetor when it dies after beginning, is difficult to begin or dies under a load. In such cases, the fuel and oil ratio to atmosphere has to be accentuated. If the chain saw sounds as if it is running too rich, it will rev at high speeds and make a high-pitched noise. In cases like this, the combination should be leaner to prevent engine damage.
Safety First
When adjusting the carburetor, you will need to place your Poulan chain saw on a flat level surface with the chain overhanging the surface, or even transfer all things so it will not come into contact with anything. The chain is moving during the adjustment procedure, which means you need to wear personal protective equipment including safety glasses, a long-sleeve shirt, long pants, closed-toe shoes and leather gloves.
Low and High Speed Adjustments
To correct the carburetor idle speed, locate the idle speed screw labeled with a “T” just above the primer bulb. Start the chain saw as you normally do and let it slack, ensuring the chain doesn’t touch anything. Insert a small flat-head screwdriver into the idle speed screw and turn it clockwise to raise the motor speed if it idles too slowly. The moment the chain begins to move, turn the screw counterclockwise until the motor idles without dying as well as the chain stops going to get the correct idle speed.
