[Lifetime Warranty] 99944200903 Speed-Feed 450 Trimmer Head

99944200903 Speed-Feed 450 Trimmer Head

Key Features

• Fast line loading system requires no head disassembly
• Tap-to-advance mechanism feeds line during operation
• Holds up to 20 feet of 0.095-inch diameter trimmer line
• Internal divider reduces line tangling and welding
• Comes pre-loaded with 0.095-inch trimmer line

Replaces / Cross-Reference Part Numbers

• Direct replacement for Echo part number: 99944200903
• Superseded by part number: 99944200950

Compatibility & Fitment

• Designed for specific Echo string trimmers, including model SRM-266
• Mounts using a 10mm x 1.25mm left-hand (LH) threaded adapter
• Verify compatibility with your specific trimmer model number before purchase

When to Replace

• Housing is cracked, broken, or excessively worn from use
• Line feed mechanism fails to advance line when tapped
• Mounting threads are stripped or damaged
• The head no longer holds the trimmer line securely

Installation Tips

• Ensure the engine is off and the spark plug is disconnected before installation
• Remove the old head by turning it clockwise (reverse-threaded)
• Ensure correct adapters are in place for your specific model
• Screw the new head on counter-clockwise until firmly seated