3-17
3
4st 4/5/6 2011
15) Inspection of Ignition Timing
Adjusting system : Automatic control, no adjustment required
Run engine and use timing light to check ignition timing.
8 timings marks are found on the side of flywheel (TDC0°,
ATDC5°, BTDC5°, 10°, 15°, 20°, 25°, 30°), and ignition
timing is read with mark on the center of starter case a
window.
14) Inspection of Idle Engine Speed
1. Start engine and run for 5 minutes to warm up.
2. Attach tachometer to spark plug high tension cord 1 to
check idle speed.
Idle Speed :
1300 r/min
Tachometer :
P/N. 3AC-99010-0
More accurate and stable reading can be
obtained when tachometer lead is connected with
high tension cords of individual cylinders linked
with each other.
Model
Range of Ignition Angle Engine Starting Idling Accelerating
F 4/5/6B TDC 0° — BTDC 25° TDC 0° TDC 0° BTDC 25°
MFS4-5-6Ech03110422.qxd 11.4.22 5:45 PM ページ17
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