Inspection Of Idle Engine Speed; Inspection Of Ignition Timing - TOHATSU MFS 4D Service Manual

14) Inspection of Idle Engine Speed

1. Start the engine to warm up for 5 minutes.
Attach tachometer to spark plug high tension cord 1
2.
to check idle speed.
Tachometer :
P/N. 3AC-99010-0
Idle Speed :
-1
RPM 1300 min

15) Inspection of Ignition Timing

Adjusting system : Automatic control, no adjustment
required.
Run the 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.
Model
MFS 4/5/6D
4st 4/5/6 2020
(rpm)
Range of Ignition Angle
TDC 0° — BTDC 25°
Engine Starting Idling
TDC 0° TDC 0°
1
a a
a
Accelerating
BTDC 25°
3-17
3