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SPECIFICATIONS
ENGINE*
DRIVE SHAFT AND CUTTING ATTACHMENT*
*All specifications are based on the latest product information available at the time of printing. We reserve the right to
make changes at any time without notice.
Drive Shaft Housing............................................................................................................................ Steel Tube (EZ-Link™)
Throttle Control.......................................................................................................................................... Finger-Tip Trigger
Approximate Unit Weight (No fuel, with handle, shield and cutting attachment) ........................................... 13.5 lbs (6 kg)
Cutting Mechanism: TB425CS & TB475SS: ...................................................................... Dual String Cutting Head
TB490BC: ................................................. 4-Tooth Cutting Blade, Dual String Cutting Head
Line Spool.............................................................................................................................................. Bump Line Releaser
Line Spool Diameter: TB425CS & TB475SS: .............................................................................. 3 inches (76.2 mm)
TB490BC:............................................................................................... 4 inches (101.6 mm)
Trimming Line Diameter: TB425CS & TB475SS......................................................................... 0.095 inches (2.41 mm)
TB490BC:...................................................................................... 0.105 inchches (2.66 mm)
TB425CS & TB475SS Cutting Path Diameter...................................................................................... 17 inches (43.18 cm)
TB490BC Cutting Path Diameter, Cutting Attachment ......................................................................... 18 inches (45.7 cm)
TB490BC Cutting Path Diameter, Cutting Blade..................................................................................... 8 Inches (204 mm)
TB490BC Shoulder Harness .................................................................................................................... Single Quick-Snap
Engine Type........................................................................................................................................... Air-Cooled, 4-Cycle
Displacement .......................................................................................................................................... 1.6 cu. in. (26.2 cc)
Clutch Type........................................................................................................................................................... Centrifugal
Operating RPM......................................................................................................................................... 6,800 - 9,300 rpm
Idle Speed RPM........................................................................................................................................ 2,800 - 3,600 rpm
Ignition Type........................................................................................................................................................... Electronic
Ignition Switch..................................................................................................................................................Rocker Switch
Valve clearance (intake) .......................................................................................................... .003–.006 in. (.076–.152 mm)
Valve clearance (exhaust) ....................................................................................................... .013–.016 in. (.330–.406 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 ......................................................................................................................................... 12 oz (355 ml)
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