Ignition Timing - Suzuki DF 90 Service Manual

7. Open warm-up lever to turn CTP switch off.
NOTE:
The fixed mode of IAC valve duty can be manually cancelled
by turning CTP switch off.
8. Close warm-up lever and then recheck engine speed.
It should now be stable at 600 – 650 r/min.
NOTE:
Idling / trolling speed of 600 – 650 r/min. is controlled by IAC
(idle air control) system.
If engine speed does not return to specification, IAC passage
(including the IAC hose) may be clogged or IAC system may
not be operating correctly.
See "IDLE AIR CONTROL SYSTEM" section on page 3-21.
NOTE:
Trolling speed (in-gear idle speed) is same as idle speed.

IGNITION TIMING

Inspect every 200 hours (12 months).
NOTE:
Before checking ignition timing, make sure idle speed is ad-
justed within specification.
1. Start engine and allow to warm up.
2. Attach timing light cord to No.1 ignition high-tension cord.
09930-76420 : Timing light
09900-26006 : Engine tachometer
3. Check ignition timing while operating engine in neutral gear
at 1000 r/min.
Ignition timing : Approx. BTDC 8° at 1000 r/min.
PERIODIC MAINTENANCE 2-15