Operation Manual

30
English / USA
BR 420
EPA:
The Emission Compliance Period
referred to on the Emissions
Compliance Label indicates the number
of operating hours for which the engine
has been shown to meet Federal
emission requirements.
Category A = 300 hours, B = 125 hours,
C = 50 hours
CARB:
The Emission Compliance Period used
on the CARB-Air Index Label indicates
the terms:
Extended = 300 hours
Intermediate = 125 hours
Moderate = 50 hours
Engine
BR 420 and
BR 420 with Catalytic Converter
Ignition System
Fuel System
Rewind Starter
Air Flow Rate
with Nozzle in CFM (m
3
/h)
Air Velocity
with Nozzle in MPH (m/s)
Weight in lbs (kg)
Specifications
Single cylinder two-stroke engine
Displacement: 3.45 ci
(56.5 cm
3
)
Bore: 1.81 in (46 mm)
Stroke: 1.34 in (34 mm)
Idle speed: 3,100 rpm
Type: Electronic magneto ignition
Spark plug
(resistor type):
Bosch WSR 6 F
or
NGK BPMR 7 A;
Electrode gap: 0.02 in (0.5 mm)
Carburetor: All position diaphragm
carburetor with integral fuel pump
Fuel tank capacity: 50 fl.oz. (1.5 l)
Fuel mix: see chapter on
“Fuel”
Starter rope: 0.14 in diameter
x 37.8 in
(3.5 mm diameter
x 960 mm)
BR 420 524 (890)
BR 420 Cat 518 (880)
BR 420 174 (77)
BR 420 Cat 172 (78)
BR 420 20.1 (9.1)
BR 420 Cat 20.5 (9.3)