Why Read This Article?
Removing the Drive Shaft:
Installing the New Drive Shaft:
Tools & Materials
Learn how to properly replace the drive shaft on your string trimmer in less than 30 minutes.
A string trimmer drive shaft is one of those parts that simply wears out over time. If it becomes too worn or breaks, you will need to replace it. And this article will help you do just that.
Removing the Drive Shaft
1. Loosen the shaft screws
Loosen the two screws that fasten the shaft assembly to the engine assembly.
Remove the air filter cover and the air filter.
With the filter assembly removed, you will have access to the throttle cable. Loosen the throttle cable tensioning nut.
Then remove the throttle cable from the trimmer body.
Carefully pull the ignition wires away from the unit. You can use a couple pair of pliers to disconnect them.
With everything disconnected you can remove the shaft assembly from the engine assembly.
Then just use your needle-nose pliers to pull the flexible shaft from the housing.
Installing the New Drive Shaft
1. Lubricate the drive shaft
Use a small amount of grease to lubricate the flexible drive shaft.
Then slide it into the drive shaft housing. The flexible shaft needs to connect with a coupling inside the housing. Twist the flexible shaft around until it slides in and is flush with the metal housing.
Slide the shaft assembly back into engine assembly and secure it with the two bolts.
Connect the throttle, then tighten the throttle nut.
Replace the air filter and secure the cover to finalize the repair.
And that's how you can replace the flexible drive shaft in a string trimmer. This simple repair will save you loads of money compared to a repair shop.
Remember to check out our lawn equipment parts page to find the right parts for your trimmer and other lawn equipment.