Husqvarna iZE 4821 Operator's Manual page 42

The machine vibrates.
42
English-
TROUBLE SHOOTING GUIDE
• The chain fixture has come loose.
• The blades are blunt.
• Driving speed too high.
• The grass is too long.
• Grass collected under the mower deck.
• The blades are loose.
• The blades are incorrectly balanced.
• The engine is loose.