Features
Lightest 50cc chain saw on the market
Decompression valve for easy starting
Automatic, adjustable clutch-driven oiler for reduced oil consumption
Two-piece air filter for easy cleaning
G-Force Engine Air Pre-Cleaner™ for longer air filter life
Tool-less air filter cover for easy access to air filter
Side-access chain tensioner for easy chain adjustment
Replaceable roller-type chain catcher protects chain drive link from damage if chain derails
Choke with automatic fast idle for easy starting
Spring vibration reduction system for operator comfort
Translucent fuel tank to easily determine fuel level
Replaceable metal spike for improved user control and leverage 
16" Bar: 16F0AD3366C / Chain: 20BPX66CQ or ES20LPX66E
18" Bar: 18F0AD3372C / Chain: 20BPX72CQ or ES20LPX72E
20" Bar: 20F0AD3378C / Chain: 20BPX78CQ or ES20LPX78E
Specifications
Displacement (cc): 50.2
Power‡ (hp): 3.3
Weight* (lbs.): 10.4 *without bar and chain
Fuel Tank Capacity (fl. oz.): 16.9
Bar Oil Capacity (fl. oz.): 9.5
Bar Lengths (in.): 16, 18, 20
Chain Pitch (in.): 0.325
Chain Gauge (in.): 0.05
Decompression Valve: Yes
Warranty: Commercial 1 yr / Consumer 5 years