Blowers · part-number series 4203

Blowers · series 4203

47 exploded views, 1,458 part numbers.

BR 320, BR 320 L, BR 400

A Crankcase, Cylinder 33
B Rewind starter, Muffler 31
C Air filter, Ignition system 34
D Carburetor HD-4B, HD-13B 58
E Carburetor BR 320 L WT-230A, WT-489 USA 57
F Fan housing 32
G Backplate 28
H Pleated hose, Blower tube 11
J Control handle 29
K Vacuum attachment 16

BR 340, BR 340 L, BR 380, BR 420, BR 420 C

Factory tuning settings

Idle speed	3,100 rpm
L screw (low speed)	1/4 turn
H screw (high speed)	1/4 turn
Confidence	sourced

Screw figures are turns open from lightly seated. Set the final mixture by ear and tachometer against the machine in front of you — running a two-stroke lean to hit a published number is how pistons get scored.

A Crankcase, Cylinder 33
B Rewind starter, Muffler 31
C Air filter, Ignition system 37
D Carburetor HD-28A, HD-29, HD-45 43
E Carburetor BR 340 L WT-580 38
F Fan housing 19
G Backplate 45
H Pleated hose, Blower tube 19
J Control handle 33
K Control handle (46.2001) 27
L Control handle BR 420 C (46.2001) 28
M Vacuum attachment 16
N Conversion kit BR/SR 37

SR 340, SR 420

Factory tuning settings

Idle speed	3,100 rpm
Max speed	6,700 rpm
L screw (low speed)	1/4 turn
H screw (high speed)	1/4 turn
Confidence	sourced

A Crankcase, Cylinder 33
B Rewind starter, Muffler 25
C Air filter, Ignition system 32
D Carburetor HD-28A, HD-29, HD-45 43
E Fan housing 13
F Backplate 26
G Fuel tank, Container 32
H Pleated hose, ULV nozzle 30
J Control handle 29
K Control handle (46.2001) 28
L Dusting and granulate spreading attachment 17
M Pressure pump 35

SR 320, SR 400

A Crankcase, Cylinder 33
B Rewind starter, Muffler 30
C Air filter, Ignition system 30
D Carburetor HD-4B, HD-13B 58
E Fan housing 25
F Backplate 30
G Container 17
H Pleated hose, ULV nozzle 34
J Control handle 29
K Dusting and granulate spreading attachment 33
L Pressure pump 43
M ULV rotary nozzle 18

Parts are not interchangeable across series — check yours before ordering.