STIHL 029, 039
4
1.2
Fuel System
029 / 039
Carburetor:
All position diaphragm
carburetor with integral fuel
pump
Standard setting
High speed adjusting screw H:
Back off approx. 1 turn
Low speed adjusting screw L:
Back off approx. 1 turn
(starting with screws tight
against their seats)
Carburetor leakage test
at gauge pressure:
0.4 bar (5.8 psi)
Fuel tank capacity:
0.56 L (1 .2 US pt)
Fuel mixture:
Regular brand-name gasoline
and brand-name two-stroke
engine oil
Mix ratio:
50:1
with Stihl two-stroke
engine oil
25:1
with other brand-name
two-stroke brand-name,
air-cooled engine oils
Air filter:
Prefilter (coarse filter)
bisectional box filter
1.3
Ignition System
Type:
Electronic magneto ignition
(breakerless) with integral
trigger unit
Air gap:
0.15-0.3 mm (0.006-0.012 in)
Ignition timing:
2.0-2.8 mm (0.08-0.10 in) B.T.D.C.
at 8,000 r.p.m.
Advance angle:
24.5-29.5° B.T.D.C.
at 8,000 r.p.m.
Spark plug (suppressed):
Bosch WSR 6 F or
NGK BPMR 7 A
Electrode gap:
0.5 mm (0.020 in)
Spark plug thread:
M14x1.25
Length of thread:
9.5 mm (0.37 in)
Heat range:
200
