G
rass
T
rimmer
/B
rush
C
uTTer
29
O
peraTOr
'
s
m
anual
s
pecIfIcatIons
MODEL ---------------------------------------------------- SRM-280, SRM-280S
Length w/o cutter head ------------------------------------ 1802 mm (70.94 in.)
Width -------------------------------------------------------- 246 mm (9.69 in.)
Height ------------------------------------------------------- 349 mm (13.74 in.)
Weight (dry) w/o Cutter Head (SRM-280) ----------- 5.57 kg (12.3 lb.)
Weight (dry) w/o Cutter Head (SRM-280S) ----------- 5.50 kg (12.1 lb.)
Engine Type ------------------------------------------------ Air cooled, two-stroke, single cylinder gasoline engine
Bore ---------------------------------------------------------- 34.0 mm (1.34 in.)
Stroke -------------------------------------------------------- 31.0 mm (1.22 in.)
Displacement ----------------------------------------------- 28.1 cc (1.71 cu. in.)
Exhaust ------------------------------------------------------
Spark arrestor muffler or spark arrestor muffler with catalyst
Carburetor--------------------------------------------------- Walbro diaphragm model w/purge pump
Ignition System -------------------------------------------- Flywheel magneto, capacitor discharge
Spark Plug -------------------------------------------------- NGK BPM-8Y (Gap 0.65 mm (0.026 in.)
Fuel ---------------------------------------------------------- Mixed (Gasoline and Two-stroke Oil)
Fuel/Oil Ratio ---------------------------------------------- 50 : 1 Power Blend X™ ISO-L-EGD (ISO/CD 13738) and
J.A.S.O. M345-
FC/FD, two-stroke, air-cooled engine oil.
Gasoline ----------------------------------------------------- Use 89 Octane unleaded. Do not use fuel containing methyl
alcohol, more than 10% ethyl alcohol or 15% MTBE. Do not use
alternative fuels such as E-15 or E-85.
Oil ------------------------------------------------------------ Power Blend X
TM
Premium Universal 2-Stroke Oil
Fuel Tank Capacity ----------------------------------------
0.64 lit. (21.6 US fl. oz.)
Starter System ---------------------------------------------- Automatic Rewind Starter
Clutch-------------------------------------------------------- Centrifugal Type
Vibration Isolated System -------------------------------- Rubber cushion on engine mount (heavy duty). Rubber grip on
front and rear handles
Operating Rod ---------------------------------------------- 25.0 mm aluminum Tube
Drive Shaft (SRM-280) -----------------------------------
6.35 mm (1/4 in.) flexible shaft
Drive Shaft (SRM-280S) --------------------------------- 7.0 mm hollow 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 6m
(20 ft.)
Handle ------------------------------------------------------- Front - Loop and Right Rear Handle w/rubber grips
Shoulder Harness ------------------------------------------ Optional
Idle Speed --------------------------------------------------- 2,500 - 3,000 RPM
Clutch Engagement Speed -------------------------------- 3,750 RPM
Wide Open Throttle Speed (W.O.T.) ------------------- 8,500 -12,000 RPM
