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How to Replace Trimmer Line

How to install trimmer line in a bump-head string trimmer

Using a traditional bump-head string trimmer is a great way to keep your yard looking sharp. The trimmer works by feeding plastic string out of a cutting head that trims tall grass, weeds and other light brush. With no blades to sharpen, these yard trimmers are easy to use and maintain. Simply bump the cutting head against the ground while it's spinning to release trimmer line. When you're out of string, follow the step-by-step instructions below to learn how to install trimmer line.

Step 1: Cut the new trimmer line to length
Begin by cutting 10 feet of new trimmer line. Either 10 feet of twin-strand split line, or two ten-foot lengths of .095" trimmer line should work, but check your operator's manual to find out exactly what kind of trimmer line to use for your Cub Cadet bump-head string trimmer.

Step 2: Take apart the cutting head
Unscrew the bump knob and remove the inner wheel and spring. Set aside the spring for now - you'll be wrapping the trimmer line around the inner wheel.

Step 3: Install the trimmer line

Step 4: Reassemble the string trimmer bump head

Free the trimmer line
Gently pull both ends of the bump-head trimmer line to ensure it's been released from the holding slots.


Use these instructions to learn how to quickly replace trimmer line in your bump-head string trimmer so you can get back to landscaping. Order string trimmer line online from Cub Cadet or find it at your local Independent Dealer. For more information on string trimmer line installation, maintenance or operation, check your Cub Cadet operator's manual.