Trimmer line breaks too often

Symptoms

• Line breaks off short after just a few minutes of use
• New line snaps almost immediately
• Line breaks especially on thick weeds or against hard edges
• Line looks brittle or discolored

Likely causes

• CommonLine diameter too thin for the vegetationLight-duty line can't handle thick weeds or brush and snaps under stress.
• CommonOld or sun-degraded lineNylon line stored for a long time or exposed to sun becomes brittle and breaks easily.
• PossibleHitting hard surfaces repeatedlyTrimming against concrete, brick, or rocks wears and snaps line quickly.
• PossibleLine wound too loosely on the spoolLoose winding lets line shift and kink, weakening it at the bend point.
• Less commonUsing off-brand or low-quality lineSome inexpensive lines are simply less durable than name-brand options.

What to do

1. Check your trimmer's manual for the maximum line diameter it supports and use the largest size within that range for tougher jobs.
2. Replace old spools of line, especially any that have been stored for over a year or left in direct sun.
3. Avoid repeatedly hitting hard surfaces like curbs and walls, angling the trimmer slightly away from them instead.
4. Rewind the spool carefully with tight, even wraps rather than loose loops.
5. Store line and loaded spools indoors out of direct sunlight and extreme temperatures when not in use.
6. Try a different, reputable brand of line if breakage continues with correctly sized, fresh line.
7. Consider a fixed-blade brush cutter attachment instead of line for consistently thick brush or weeds.

Tools and parts

• Replacement trimmer line

When to call a pro

This is a simple DIY fix; professional service isn't typically needed for line breakage issues.

Safety