Ignition System Specifications - Stihl 28 Service Manual

1.3 Ignition System
Fuel mixture:
Air filter::
028 AV and 028 AVQ
Type:
Magneto edge gap:
Air gap:
Ignition timing:
Ignition advance angle:
Breaker point gap::
Condenser:
Armature:
028 AVE
Type:
Air gap:
Ignition timing::
Ignition advance angle:
Armature:
028 AVEQ
Type:
Air gap:
Ignition timing:
All Models
Spark plug (suppressed):
Spark plug thread:
Fuel mix 1 :40 with
STIHL two-cycle engine oil;
1 :25 for other branded
two-cycle engine oils
Flat wire mesh filter
Breaker-controlled magneto
ignition system
4 .. " 8 mm (0,,16 . " . 0.31 in)
0,,2 ... 0.3 mm (0.008" " . 0.012 in)
2.2 .. ,,2,,3 mm (0.087" , ,,0.091 in)
before T..D"C.
27"".28°
5
0.35 ... 0.4 mm (0.014. , .0.016 in)
Capacitance 0.15" " . 0.19 IlF
Coil resistors
Primary
0..7 ... 1,,00
Secondary
7..7 ... 10.3 kQ
Transistor-controlled (breaker-
less) magneto ignition system
0.2. " . 0,,3 mm (0,,008,. , 0.012 in)
2.6 mm (0,,1 in) before T.D.C"
at 8000 rpm
30° at 8000 rpm
as 028 AV/028 AVQ
Thyristor-controlled (breaker-
less) magneto ignition system
0,,2 ... 0.3 mm (0.008 ... 0,,012 in)
2.6 mm (0,,1 in) before T.D.C"
at 8000 rpm
Bosch WSR 6 F or
Champion RCJ 6 Y
Heat range: 200
Electrode gap:: 0.5 mm (0,,02 in)
M 14x1..25; 9.5 mm (0.37 in) long