How to Replace the Carburetor on a Poulan Pro Chainsaw
Finish Nailer Repair - Replacing the Driver Guide (Ridgid Part # 79004001022)
The carburetor brings fuel and air together in the perfect ration for combustion. This carburetor replacement kit includes a new carburetor, a purge bulb, and the fuel line that connects them. The carburetor has many tiny passages that route fuel through it. If dirt or corrosion plugs these passages, the engine will run poorly (or not start at all). A carburetor can be cleaned and rebuilt, but often, it is faster and less expensive to simply replace it.
Let's get started.
REMOVING THE CARBURETOR
1. Drain the fuel.
a. Drain the excess fuel from the fuel tank.
2. Remove the air filter.
a. Loosen the knob securing the airbox cover.
b. Remove the airbox cover from the saw.
c. Pull the wire retaining bar down and away from the air filter.
d. Lift the air filter out of the saw.
3. Remove the starter assembly.
a. Remove the screws securing the starter assembly to the saw.
b. Remove the starter assembly from the saw.
4. Remove the top cover.
a. Use a hex wrench to remove the screws securing the top cover to the saw.
b. Lift the top cover away from the saw.
5. Remove the air filter base.
a. Remove the two nuts securing the air filter base to the mounting studs.
b. Remove the screw securing the lower portion of the air filter base to the engine housing.
c. Use long-nosed pliers to disconnect the ignition wires from the switch assembly.
d. Lift the air filter out of the saw.
6. Remove the choke lever.
a. Pivot the choke lever horizontally to disengage the choke lever linkage from the carburetor.
b. Remove the choke lever.
7. Disconnect the throttle linkage.
a. Depress the trigger lockout lever to expose the lower throttle linkage attachment point.
b. Disconnect the throttle linkage from the trigger lockout assembly.
c. Disconnect the throttle linkage from the carburetor.
8. Remove the carburetor.
a. Slide the carburetor off the mounting studs.
b. Use long-nosed pliers to disconnect the incoming fuel line from the carburetor.
c. Use long-nosed pliers to squeeze the tabs on the inside of the purge bulb assembly and release the purge bulb from the engine housing.
d. Use long-nosed pliers to disconnect the fuel return line from the purge bulb assembly.
e. Remove the carburetor (and purge bulb) from the saw.
INSTALLING THE NEW CARBURETOR
9. Install the carburetor.
a. Connect the fuel return line to the new purge bulb assembly.
b. Install the purge bulb assembly into the engine housing. (The assembly should snap into place when properly aligned.)
c. Connect the incoming fuel line to the new carburetor.
d. Install the new carburetor onto the mounting studs.
REASSEMBLING THE UNIT
10. Reconnect the throttle linkage.
a. Connect the throttle linkage to the new carburetor.
b. Squeeze the trigger lockout lever to expose the lower throttle linkage attachment point.
c. Connect the lower throttle linkage to the trigger lockout assembly.
11. Reinstall the choke lever.
a. Align the choke linkage with linkage on the carburetor.
b. Install the choke lever.
12. Reinstall the air filter base.
a. Install the air filter base and switch assembly onto the mounting studs.
b. Secure the air filter base with the two nuts and the single screw.
c. Reconnect the ignition wires to the switch assembly.
13. Reinstall the starter assembly.
a. Install the starter assembly.
b. Pull the starter rope slightly (as necessary) to align the internal components.
c. Secure the starter assembly with the screws.
14. Reinstall the top cover.
a. Install the top cover.
b. Secure the top cover with the screws.
15. Reinstall the air filter.
a. Install the air filter into the airbox assembly.
b. Secure the air filter with the wire retainer.
16. Reinstall the airbox cover.
a. Install the airbox cover.
b. Tighten the knob to secure the airbox cover.