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Specications
Specications are subject to change without
notice.
Emission Control Label (located on Engine) (EXAMPLE ONLY, information on label varies by FAMILY).
PRODUCT EMISSION DURABILITY (EMISSION COMPLIANCE PERIOD)
The 300 hour emission compliance period is the time span selected by the manufacturer certifying the engine
emissions output meets applicable emissions regulations, provided that approved maintenance procedures are
followed as listed in the Maintenance Section of this manual.
Emission Control (exhaust & evaporative)
EPA 2010 and Later and/or C.A.R.B. TIER III
The emission control system for the engine is EM/TWC (Engine Modication and 3-way Catalyst) and for the fuel tank
the Control System is EVAP (Evaporative Emissions) or N (for nylon tank). Evaporative emission may be applicable to
California models only.
Model HT231-30 HT231-40
Engine Type 2-cycle, horizontal cylinder, air cooled
Engine Bore x Stroke 32 mm x 28 mm (1.26 in x 1.10 in.)
Engine Displacement 22.5cc (1.37 in
3
)
Unit Weight, Less Fuel 5.9 kg (13.0 lb) 6.4 kg (14.1 lb)
Unit Dimensions (LxWxH) 1080 x 250 x 240 mm (42.52 x 9.84 x 9.45 in) 1410 x 250 x 240 mm (55.51 x 9.84 x 9.45 in)
Fuel Tank Capacity .53 liter (18.0 oz.)
Fuel/oil ratio 50:1 with *ISO-L-EGD or JASO FD class 2-cycle Mixing Oil
Carburetor Diaphragm type
Ignition Fully electronic, transistor controlled
Spark Plug NGK BPMR6A
Electrode Gap .6 mm (.024 in)
Torque 150-170 kgf • cm / 130-150 in • lbf
Air Cleaner Foam element
Mufer Type Spark arrestor mufer or spark arrestor mufer with catalyst
Starting Method Recoil type
Stopping Method Slide switch,grounding type
Blade Length 740 mm (29.13 in) 1060 mm (41.73 in)
Blade Type Double-blade cutting action: single-edged blade
Clutch Type Centrifugal clutch, dry-type
Gear Type Spur gears
Gear Lubrication Lithium-based grease
Standard Equipment
Rear handle w/integral controls, anti-vibe mountings, front handle w/guard, tool set, blade cover.
Idle Speed (RPM) 3,000
Clutch Engagement Speed (RPM) 4,100
Wide Open Throttle (RPM) 11,000
IMPORTANT
This spark ignition system complies with the Canadian standard ICES-002.