STIHL 064, 066 53
5.1.6 Ignition Module
1 = Connector tag for short
1 = Flywheel (064) circuit wire
2 = Flywheel (066) Markings on flywheel 2 = High voltage output
3 = Magnet poles B = Analog ignition 3 = Connector tag for LED wire
4 = Magnet poles P = Digital ignition (066 only)
- Inspect the flywheel and magnet The flywheel of 064 saws from ma- The ignition module accommo-
poles for any signs of cracks or chine number X 22 179 109 has dates all the components required
other damage. Fit a new flywheel only one key slot. This flywheel to control ignition timing. There are
if you find any damage. may only be installed in machines either two or three electrical con-
with digital ignition systems. Model nections on the coil body, i.e.:
To install the flywheel: 066 saws have been equipped
with digital ignition modules since 1. Connector tag for short circuit
- Check that Woodruff key is cor- start of production and their fly- wire
rectly positioned. wheels have only one key slot. 2. High voltage output
3. Connector tag for LED wire
Important: Clean the stub of the - Fit mounting nut and tighten
crankshaft and the flywheel hub it down to a torque of 33 Nm In the event of a fault in one of the
bore with a suitable standard com- (24.3 Ibf.ft). integrated elements, the ignition
mercial, solvent-based degreasant. module will malfunction and must
Fit the flywheel in place. On model Assembly of the remaining parts is be replaced as a complete unit.
064 the position of the Woodruff now a reversal of the disassembly
key differs by 40° for analog and sequence. When using the spark test to
digital ignitions. Replacement fly- check installed digital ignition
wheels have two slots to take this modules with the spark plug un-
into account. If an analog ignition screwed, make sure that the star-
module is fitted (Bosch), install the ter rope is pulled at a sufficiently
flywheel in position "B". Use posi- high speed. If there is no spark at
tion "P" for digital ignition modules the plug when the starter is pulled,
(Prüfrex). repeat the test at a higher cranking
speed. If there is still no spark, re-
place the digital ignition module.