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ENGINE
3-8
7. Install:
• Spark plug
TIP
Before installing the spark plug, clean the
spark plug and gasket surface.
8. Connect:
• Spark plug cap
EAS20700
CHECKING THE IGNITION TIMING
TIP
Prior to checking the ignition timing, check the
wiring connections of the entire ignition sys-
tem. Make sure all connections are tight and
free of corrosion.
1. Connect:
• Timing light
• Digital tachometer
(onto the ignition coil spark plug lead)
2. Check:
• Ignition timing
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a. Start the engine, warm it up for several
minutes, and then let it run at the specified
engine idling speed.
b. Remove the timing mark accessing screw
“1”.
c. Check that the stationary pointer “a” is
within the firing range “b” on the pickup coil
rotor.
Incorrect firing range → Check the ignition
system.
d. Install the timing mark accessing screw.
TIP
The ignition timing is not adjustable.
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3. Detach:
• Timing light
• Digital tachometer
EAS20710
MEASURING THE COMPRESSION PRES-
SURE
The following procedure applies to the cylinder.
TIP
Insufficient compression pressure will result in
a loss of performance.
1. Measure:
• Valve clearance
Out of specification → Adjust.
Refer to “ADJUSTING THE VALVE
CLEARANCE” on page 3-4.
2. Start the engine, warm it up for several
minutes, and then turn it off.
3. Disconnect:
• Spark plug cap
Spark plug
18 Nm (1.8 m·kg, 13 ft·lb)
Timing light
90890-03141
Inductive clamp timing light
YU-03141
Digital tachometer
90890-06760
YU-39951-B
Engine idling speed
1500–1600 r/min