Specifications - Echo SRM-251U Operator's Manual

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PECIFICATIONS
MODEL ----------------------------------------------------- SRM-251U
Length ------------------------------------------------------- 1832 mm (72.12 in.)
Width -------------------------------------------------------- 695 mm (27.37 in.)
Height ------------------------------------------------------- 447 mm (17.62 in.)
Weight (dry) w/Cutter Head ------------------------------ 5.74 kg (12.67 lb.)
Engine Type ------------------------------------------------ Air cooled, two-stroke, single cylinder gasoline engine
Bore ---------------------------------------------------------- 34.0 mm (1.34 in.)
Stroke -------------------------------------------------------- 28.0 mm (1.10 in.)
Displacement ----------------------------------------------- 25.4 cc (1.55 cu. in.)
Exhaust ------------------------------------------------------ Spark Arrestor Muffler w/catalyst
Carburetor -------------------------------------------------- Walbro w/purge pump
Ignition System -------------------------------------------- Flywheel magneto, transistor control ignition type
Spark Plug -------------------------------------------------- NGK BPM-8Y (Gap 0.65 mm (0.026 in.)
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,
Oil ------------------------------------------------------------ Power Blend
Fuel Tank Capacity ---------------------------------------- 0.42 lit. (14.2 US fl. oz.)
Recoil Starter System -------------------------------------- i-30 Automatic Recoil Starter
Clutch ------------------------------------------------------- Centrifugal Type
Vibration Isolated System --------------------------------- Rubber anti-vibration grip on handles.
Operating Rod ---------------------------------------------- 25.0 mm aluminum Tube
Drive Shaft -------------------------------------------------- 6.35 mm (1/4 in.) flexible shaft
Gear Case Ratio -------------------------------------------- 1:4.1 Reduction
Rotating Direction ----------------------------------------- Counter Clockwise; viewed from top
Cutter Head ------------------------------------------------- Nylon line head (2-line) with .095 Crossfire™ Line capacity
Handle ------------------------------------------------------- U-Handle
Shoulder Harness ------------------------------------------ Standard
Idle Speed --------------------------------------------------- 2,400 - 3,200 RPM
Wide Open Throttle Speed (W.O.T.)
with Nylon Line Head ------------------------------------- 8,500 - 10,500 RPM
Wide Open Throttle Speed (W.O.T.)
with Blade -------------------------------------------------- 9,500 - 11,500 RPM
more than 10% ethyl alcohol or 15% MTBE.
TM
Premium Universal 2-Stroke Oil
12m (40 ft.), 8 in. Grass/Weed Blade