© 2011 ICS | Blount, Inc. Specifications and pricing are subject to change without notice. P/N 550416 REV06012011660GC SERVICE MANUAL4Engine Type 2-stroke Single Cylinder Air CooledDisplacement 3.9 cu-in (64 cc)Horsepower 4.2 HP (3.1 kw) @ 9,500 RPMTorque 32 in-lbs (3.6 Nm) @ 6,000 RPMEngine Speed 11,500 +/- 500 rpm (max)2,800-3,200 rpm (idle)Weight 18.2 lbs (8.3 kg) without guidebar anddiamond chainCut Depth Up to 10 inches (25.4 cm)Dimensions17 inches (44 cm) length10 inches (25.5 cm) height11.6 inches (29.5 cm) widthAir Filter Water Resistant PolyesterCarburetor Walbro HDA225Starter Dust and Water resistantIgnition Special water resistant electronicignitionClutch Centrifugal three shoe, single springFuel Mix ratio 25:1 (4%)Fuel Capacity 0.26 gallons (1 Liter)Water Supply Minimum 20 psi (1.5 bar)Water Flow Minimum 2 gpm (8 lpm)Noise Level 101 dB at 3 ft (1m)Vibration Level 6.2 m/s2 (front handle)7.3 m/s2 (rear handle)Engine Break-in Period One tank, without cutting, cyclingthrottleSpark PlugChampion CJ7Y, Bosch BWS7F, orNGK BPMR7A.Electrode gap .020 in (0.5 mm)SPECIFICATIONS2. SPECIFICATIONS