Checking The Spark Advance - PIAGGIO MSS X10 500ie Executive Service Station Manual

MSS X10 500ie Executive

Checking the spark advance

The ignition advance is determined electronically
on the basis of parameters known by the control
unit. For this reason it is not possible to interpret
the reference values based on the engine rpm.
The ignition advance value is detectable at any
time using the diagnostic tester. It is possible to
check whether the ignition advance determined by
the injection system matches the value actually
activated on the engine, by means of the strobo-
scopic light.
Proceed as follows:
- Remove the spark plugs.
- Remove the transmission crankcase.
- Rotate the driving pulley fan until the reference
marks between the flywheel and flywheel cover
meet as shown in the photograph.
- Bring the reference mark onto the transmission
side between the fan and the transmission cover
as shown in the photograph.
- Refit the spark plugs.
- Refit the plastic cap on the flywheel cover.
- Adjust the spark gap to the contact position (no
reference mark visible) and install it on the engine
between the spark plug and spark plug cap
- Connect the induction clamp to the spark gap
cable respecting the proper polarity (the arrow on
the clamp must be pointing at the spark plug).
Maintenance
MAIN - 27