GRASS TRIMMER/BRUSH CUTTER
OPERATOR'S MANUAL
25
SPECIFICATIONS
MODELS ---------------------------------------------------SRM-251, SRM-251E
Length-------------------------------------------------------1800 mm (70.9 in.)
Width--------------------------------------------------------245 mm (9.65 in.)
Height ------------------------------------------------------- 330 mm (13.0 in.)
Weight (dry) w/Cutter Head (SRM-251) ----------------5.52 kg (12.2 lb.)
Weight (dry) w/Cutter Head (SRM-251E) ---------------5.42 kg (11.9 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 (SRM-251) ---------------------------------------- Spark Arrestor Muffler with catalyst
Exhaust (SRM-251E) ---------------------------------------Spark Arrestor Muffler
Carburetor --------------------------------------------------Zama diaphragm model w/purge pump
Ignition System -------------------------------------------- Flywheel magneto, capacitor discharge ignition
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,
more than 10% ethyl alcohol or 15% MTBE.
Oil ------------------------------------------------------------Power Blend
TM
Premium Universal 2-Stroke Oil
Fuel Tank Capacity ---------------------------------------- 0.40 lit. (13.5 US fl. oz.)
Recoil Starter System --------------------------------------i-30 Automatic Recoil Starter
Clutch -------------------------------------------------------Centrifugal Type
Vibration Isolated System--------------------------------- Rubber anti-vibration grip on front handle.
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 6 m (20 ft.)
Handle ------------------------------------------------------- Front - Loop and right rear handle with rubber grip
Shoulder Harness ------------------------------------------ Optional
Idle Speed--------------------------------------------------- 2,400 - 3,200 RPM
Wide Open Throttle Speed (W.O.T.) -------------------- 7,850 - 9,850 RPM
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