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Specications
Specifications are subject to change without notice.
Model AH254
Engine Type 4-cycle, vertical cylinder, air cooled
Engine Bore x Stroke 34 x 27 mm/1.3 x 1.1 in.
Engine Displacement 24.5cc/1.5 cu. in.
Unit Weight, Less Fuel 6.3 kg/14 lbs.
Unit Dimensions (LxWxH) 2360 x 225 x 235 mm / 92.9 x 8.9 x 9.3 in.
Fuel Tank Capacity 590 ml/20.3 oz..
Fuel/oil ratio 50:1 with *ISO-L-EGD or JASO FD class engine oil
Carburetor Diaphragm type
Ignition Fully electronic, program controlled
Spark Plug** NGK CMR5H
Electrode Gap 0.6 mm/ .024 in.
Torque 16.7 - 18.6 N∙m / 148-165 in • lbf
Air Cleaner Foam pre-lter; sealed felt main lter
Starting Method Recoil Starter
Stopping Method Slide switch, grounding type
Blade Length 567 mm/22.3 in
Clutch Type Automatic, centrifugal clutch with bevel gear
Gear Type Spur gears
Gear Lubrication Lithium-based grease
Standard Equipment
Tool kit, blade cover.
Idle Speed 3,000 RPM
Clutch Engagement Speed 4,100 RPM
Wide Open Throttle Speed (W.O.T.) 10,500 RPM
An Emission Control Label is located on the unit. (This is an EXAMPLE ONLY; information on label varies by en-
gine 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.
IMPORTANT!
This spark ignition system complies with the Canadian standard ICES-002.