3-29
3
4st 9.9/15/20 2008
21) Inspection of Ignition Timing
Adjusting system : Automatic control, no adjustment required
Run engine and use timing light to check ignition timing.
11 timings marks are found on the side of flywheel (TDC0°,
ATDC5°, 10°, BTDC5°, 10°, 15°, 20°, 25°, 30°, 35° and 40°),
and ignition timing is read with mark on the center of starter
case window.
20) Inspection of Idle Engine Speed
1. Start engine and run for 5 minutes to warm up.
2. Attach tachometer to high tension cord 1 to check idle
speed.
Idle Speed :
950 ± 30r/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.
Outboard Model Range of Ignition Angle Engine Starting Idling Accelerating
F 9.9/15/20C BTDC 5°ー BTDC 35° BTDC 5° BTDC 5° BTDC 35°
E_MFS20C_ch03_090105.qxd 09.1.20 5:23 PM ページ 29
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