Trimmer Plus String trimmer string line won't feed: Common Causes & How to Fix
1String Trimmer Trimmer Head
Most Common Solution
Repair Instructions:
If the threads on the drive shaft are stripped, the trimmer head won't stay attached to the shaft. When that happens, you'll need to replace both the head and the shaft. Damaged threads prevent solid connection. Check the shaft's threads closely for any stripping or wear issues. If the threads are compromised, neither the head nor shaft can be salvaged. Trying to reuse a shaft with bad threads risks the head disconnecting during use. For safety, always replace both components together when the threading is damaged. Installing a new head paired with an undamaged shaft will restore good function. Properly mating threads are crucial for the head and shaft to stay connected while spinning. Replace any parts with thread damage to ensure safe, solid attachment.
How to Replace String Trimmer Head
- Disconnect spark plug wire from spark plug to prevent accidental starting.
- Remove any covers or shields around trimmer head. Consult owner's manual.
- Loosen trimmer head bolt using an appropriate-sized wrench or socket.
- Unscrew trimmer head counterclockwise to detach it from the shaft.
- Discard old trimmer line remaining on the spool. Clean debris from the head.
- Feed new trimmer line through eyelets per line capacity of the new head. Refer to instructions.
- Wind trimmer line evenly around the spool in the direction indicated on the head.
- Thread trimmer head onto shaft clockwise until tight and properly aligned.
- Tighten trimmer head bolt securely using a wrench or socket. Do not over-tighten.
- Release trimmer line to proper length by tapping the head on the ground.
- Reinstall any covers or shields removed earlier.
- Reconnect spark plug wire to spark plug when finished.
- Start the trimmer to test proper string advance and cutting.
2String Trimmer Trimmer Line
Most Common Solution
Repair Instructions:
The issue could be the trimmer line is the wrong size. If the line is too thick or thin for the head, it won't feed through properly. Make sure you're using the right size line for your Trimmer Plus string trimmer model. The line has to match the specific head's specifications. Check the manual or labels on your machine for the proper diameter. Using the wrong-sized line can prevent feeding and cutting. Too large won't fit and too small may jam or slip. Install only the size recommended for optimal trimming. The correct gauge line will smoothly feed out when tapping the head on the ground. If the line bunches up or jams, it's likely the wrong dimensions. Swapping in the exact size stated for your trimmer ensures smooth line advance for trimming.
How to Replace String Trimmer Line
- Disconnect spark plug wire from spark plug to prevent accidental starting.
- Remove spool cover to access the trimmer head, if equipped. Consult the owner's manual.
- Unwind any old string remaining on the spool and remove it completely.
- Clean debris from head and spool using a small brush or compressed air.
- Measure proper length of new line per the manufacturer’s instructions, usually 15-20 feet.
- Insert one end of line into anchor hole in the spool and wind the line evenly and tightly around the spool.
- Leave 4-6 inches of line extending from each side of the spool.
- Adjust trimmer head to release the additional line if needed. Refer to the owner's manual.
- Replace spool cover if removed earlier. Ensure it is securely attached.
- Reconnect spark plug wire to the spark plug when finished.
- Start trimmer and tap the head on the ground to release the line to operating length.
3String Trimmer Trimmer Housing
Most Common Solution
Repair Instructions:
Check if the trimmer housing is cracked, chipped, or broken anywhere. Look over the housing closely for damage. If the housing has any cracks or pieces broken off, you'll need to replace the whole trimmer head. The housing surrounds and protects the spinning trimmer line. But cracks or chips can let the line strike the housing when trimming. Even small fractures weaken the housing and make it unsafe. Any visible damage means the housing can't protect properly anymore. Don't use the trimmer if the housing is compromised. Installing a brand new, intact trimmer head restores full housing protection again. The housing must fully encase the line without any cracks or defects. Replace at the first sign of damage to prevent unsafe use and injury.
How to Replace String Trimmer Housing
- Disconnect spark plug wire from the spark plug to prevent accidental starting.
- Remove trimmer head, guards, and any other accessories attached to the housing.
- Remove drive shaft by detaching the clutch and sliding the shaft out of the old housing.
- Detach throttle cable and fuel lines from old housing. Note connections.
- Remove mounting screws to separate the old housing from the trimmer.
- Transfer throttle cable and fuel lines to new housing, reconnecting properly.
- Insert drive shaft into new housing and reattach clutch and accessories.
- Align new housing and replace mounting screws. Do not overtighten.
- Check shaft rotation and throttle trigger by turning the drive shaft manually.
- Reinstall trimmer head and guards onto new housing.
- Reconnect spark plug wire to spark plug when finished.
- Start trimmer and test operation for several minutes, ensuring proper performance.