Symptoms
- Engine revs but blade stays still
- Blade turns slowly or hesitates
- Belt squealing under load
- Grass or debris wrapped around the blade shaft
Likely causes
- CommonWorn or broken drive beltThe belt connecting the engine to the blade wears and can slip or snap.
- CommonDebris jammed around the blade or shaftWrapped grass or roots can stop the blade from turning freely.
- PossibleWorn clutch or drive pulleyA slipping clutch mechanism won't transfer engine power to the blade.
- Less commonBent blade shaftHitting a hard object can bend the shaft and cause binding.
What to do
- Shut off the engine and disconnect the spark plug wire before touching the blade.
- Clear any wrapped grass, string, or debris from the blade shaft.
- Remove the belt cover and check the drive belt for wear, glazing, or breakage.
- Check the tension pulley and clutch lever for proper engagement.
- Spin the blade by hand (with the plug wire off) to feel for binding or roughness.
- Replace a damaged belt with the correct replacement part.
- If the blade still won't turn with a new belt, have the clutch or shaft inspected by a repair shop.
Tools and parts
- Wrench set
- Replacement belt
Edger drive beltSearch: “lawn edger drive belt replacement”
When to call a pro
If the shaft is bent or the clutch is failing, a small-engine mechanic can diagnose and repair it.
Safety
Use caution
Always disconnect the spark plug wire before working near the blade to prevent accidental starting.