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G
RASS
T
RIMMER
/B
RUSH
C
UTTER
O
PERATOR
'
S
M
ANUAL
25
S
PECIFICATIONS
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
Summary of Contents for srm-251
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Page 27: ...GRASS TRIMMER BRUSH CUTTER OPERATOR S MANUAL 27 NOTES...