Instruction Manual

BR 500, BR 550, BR 600
English
32
Ignition System
Electronic magneto ignition
Fuel System
All position diaphragm carburetor with
integral fuel pump
Blowing Performance
Weight
Users of this unit should carry out only
the maintenance operations described
in this manual. STIHL recommends that
other repair work be performed only by
authorized STIHL servicing dealers
using genuine STIHL replacement parts.
Genuine STIHL parts can be identified
by the STIHL part number, the
{ logo and, in some cases, by
the STIHL parts symbol K. The
symbol may appear alone on small
parts.
For repairs of any component of this
unit’s air emissions control system,
please refer to the air emissions
systems warranty in this manual.
Spark plug (resistor
type):
NGK CMR 6 H,
BOSCH USR 4AC
Electrode gap: 0.02 in (0.5 mm)
Fuel tank capacity: 47.3 fl.oz (1.4 l)
Blowing force:
BR 500: 22 N
BR 550: 27 N
BR 600: 32 N
Air speed
BR 500: 172 mph (77 m/s)
BR 550: 210 mph (94 m/s)
BR 600: 199 mph (89 m/s)
Air flow rate:
BR 500: 544 cf/min (925 m
3
/h)
BR 550: 547 cf/min (930 m
3
/h)
BR 600: 677 cf/min (1150 m
3
/h)
Maximum air velocity:
BR 500: 208 mph (93 m/s)
BR 550: 253 mph (113 m/s)
BR 600: 237 mph (106 m/s)
Maximum air flow rate without blower
tube assembly:
BR 500: 812 cf/min (1380 m
3
/h)
BR 550: 877 cf/min (1490 m
3
/h)
BR 600: 1012 cf/min (1720 m
3
/h)
dry
BR 500: 22.3 lbs (10.10 kg)
BR 550: 21.8 lbs (9.9 kg)
BR 600: 21.6 lbs (9.8 kg)
BR 600 with
base plate: 22.3 lbs (10.1 kg)
Maintenance and Repairs