Specifications; Engine; Drive Shaft & Cutting Attachment - Troy-Bilt TB490BC Operator's Manual

Engine Type ................................................................. Air-Cooled, 4-Cycle
Displacement ................................................................. 1.6 cu. in. (26.2 cc)
Clutch Type ......................................................................... Centrifugal
Operating RPM (Trimmer) ......................................................... 7,200-8,300 rpm
Operating RPM (Brushcutter) ...................................................... 7,200-9,800 rpm
Idle Speed RPM ................................................................. 3,000-3,600 rpm
Ignition Type ......................................................................... Electronic
Ignition Switch .................................................................... Rocker Switch
Valve clearance (intake and exhaust) ...................................... 003-.006 in. (.076-.0152 mm)
Spark Plug Gap ............................................................ 0.025 inch (0.655 mm)
Lubrication .......................................................................... SAE 30 Oil
Crankcase Oil Capacity ............................................................ 3.4 oz (100 ml)
Fuel ................................................................................ Unleaded
Carburetor ................................................................ Diaphragm, All-Position
Starter ............................................................................ Auto Rewind
Muffler ....................................................................... Baffled with Guard
Throttle .................................................................... Manual Spring Return
Fuel Tank Capacity ................................................................. 20 oz (591 ml)
Fuel Tank ....................................................................... HD Polyethylene
Drive Shaft Housing ...................................................... Aluminum Tube (EZ-Link
TM)
Throttle Control ................................................................. Finger-Tip Trigger
Unit Weight (No Fuel, with J-handle, Cutting attachment shield and Cutting attachment) ....... 13.5 Ibs (6.13 kg)
Cutting Mechanism ..................................... 4-Tooth Cutting Blade, Dual String Cutting Head
Line Spool ................................................................... Bump Line Releaser
Line Spool Diameter .......................................................... 4 inches (101.6 mm)
Trimming Line Diameter ....................................................... 0.105 inch (2.66 ram)
Cutting Path Diameter, Cutting Attachment ......................................... 18 inches (45.7 cm)
Cutting Path Diameter, Cutting Blade ............................................... 8 Inches (204 ram)
Shoulder Harness .............................................................. Single Quick-Snap
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