Weed eater parts take a lot of abuse, but few parts take as much as the starter pulley. Since quite a bit of force must be used to twist this pulley in order to fire the engine, it is common for this part to break. Luckily, it can be replaced fairly easily following these simple steps.
Step 1 – Find and Remove the Starter Housing
Depending on the model, removing the starter housing may be as easy as using a screwdriver to remove a plastic casing to get to the starter pulley. However, some models require the engine and clutch to be disengaged before the starter can be reached. If this is the case, use a screwdriver, Allen wrench or socket wrench to remove the engine from the pole part of the weed trimmer that has the cutting implement at the end of it. These models also require one to remove the spark plug and insert a piston stop to keep the engine from turning while the starter is being worked on.
Step 2 – Remove the Pull Cord
Use a screwdriver to disengage the tab that holds the pull cord (a simple knot may also need to be united). Remove the pull cord; if it is intact it can be used again later, if not replace it.
Step 3 – Replace the Pulley
Some models have a screw directly in the center of the pulley that needs to be taken out before the pulley will come free. Otherwise, simply pry the pulley off the spring it is mounted on. Regardless of how the pulley is removed, perform the operation gently because the spring below, if wound, will release violently once the pulley is removed. If any resistance is felt turn the pulley clockwise, in some models this will automatically disengage the spring from the pulley.
Step 4 – Reset the Spring
Once the pulley has been replaced, turn the pulley until the spring catches on it once again. Twist the pulley against the spring until it is tight and then hold it while replacing the cord. This will make it so that when the pulley spins back to its neutral position, it will recoil the starter cord.