Ignition Timing - Suzuki DF 40 Service Manual

2-15 PERIODIC MAINTENANCE
(9) Release pinch, allowing air to the IAC valve, and recheck if
engine speed is stable at 800 – 900 r / min.
NOTE:
The idling / trolling speed of 800 – 900 r / min. is controlled by
the IAC ( idle air control ) system.
If the engine speed does not return to specification, the IAC
passage (including the IAC hose and silencer) may be clogged
or the IAC system may not operating correctly.
See the "IDLE AIR CONTROL SYSTEM" section, 3-20.
NOTE:
Trolling speed (in-gear idle speed) is the same as idle speed.
(10) Reinstall parts removed earlier.

IGNITION TIMING

Inspect every 200 hours (12 months)
NOTE:
Before checking the ignition timing, make sure idle speed is
adjusted within the specification.
(1) Start the engine.
(2) Attach the timing light cord to the No.1 ignition coil primary
wire .
09930-76420 : Timing light
(3) Check the ignition timing while operating the engine at 1000
r / min.
Ignition timing : Approx. BTDC 7° at 1000 r / min.