Husqvarna W21 Operator's Manual page 47

Grass catcher not filling (if so equipped)
Hard to push
Loss of drive or slowing of drive speed
TROUBLE SHOOTING GUIDE
• Cutting height too low.
• Lift on blade worn off.
l• Catcher not venting air.
• Grass is too high or wheel height is too low.
• Rear of lawn mower housing or cutting blade
dragging in heavy grass.
• Grass catcher too full.
• Handle height position not right for you.
• Belt wear.
• Belt off of pulley.
• Drive cable worn or broken.
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