Echo PB-251 - Manual (Page 21)

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PECIFICATIONS
MODEL ----------------------------------------------------- PB-251 Hand Held
Length ------------------------------------------------------- 330 mm (13.0 in.) (w/o pipes)
Width -------------------------------------------------------- 265 mm (10.4 in.)
Height ------------------------------------------------------- 360 mm (14.2 in.)
Weight (dry) ------------------------------------------------ 4.1 kg (9.11 lb.)
Engine Type ------------------------------------------------ Air cooled, two-stroke, single cylinder gasoline engine
Displacement ----------------------------------------------- 25.4cc (1.55 cu. in.)
Bore ---------------------------------------------------------- 34.0 mm (1.34 in.)
Stroke -------------------------------------------------------- 28.0 mm (1.10 in.)
Carburetor -------------------------------------------------- Zama Diaphragm model w/primer bulb
Ignition System -------------------------------------------- Flywheel Magneto, capacitor discharge ignition type
Spark Plug -------------------------------------------------- NGK BPM8Y Gap 0.65 mm (0.026 in.)
Exhaust System -------------------------------------------- Spark Arrestor Muffler w / Catayst
Fuel ---------------------------------------------------------- Mixed (Gasoline and Two-stroke Oil)
Fuel/Oil Ratio ----------------------------------------------- 50:1 two-stroke air cooled engine oil
Gasoline ----------------------------------------------------- 89 Octane unleaded. DO NOT use fuel containing methyl alcohol,
more than 10% ethyl alcohol or 15% MTBE.
Oil ------------------------------------------------------------ Power Blend TM Premium Universal 2-Stroke oil
Fuel Tank Capacity ---------------------------------------- 0.5 lit. (16.9 US fl. oz.)
Recoil Starter System -------------------------------------- Automatic Recoil Starter Centrifugal Type
Idle Speed (RPM) ------------------------------------------ 2,700 - 3,300
Wide Open Throttle Speed (RPM) ----------------------- 6,700 - 7,200
Maximum Air Speed w/pipes (MPH) -------------------- 63.5 m/sec (142 mph)
Maximum Air Volume -------------------------------------- 10.9 m 3/ min. (386 cu. ft./min.)
Sound Level at 50 ft. dB(A) scale per ANSI B175.2 ---- 65 dB(A)