16
Valve Clearance
1. Remove the engine stop safety cable from the emergency stop switch assembly and
remove the spark plug cap from the spark plug.
2. Remove belt cover.
3. Remove the fuel pump and cylinder head cover.
4. Check the timing band for slack, aging, or damage. Replace it if necessary.
5. Turn the flywheel clockwise. Align "1" on the driven pulley with "▼" on the cylinder
head.
Check the intake valve clearance of cylinders 1# and 2# and the exhaust valve clearance
of cylinders 1# and 3#. Correct it if necessary.
6. Turn the flywheel 180° clockwise; Align "●" on the driven pulley with "▼" on the
cylinder head.
7. Check the intake valve clearance of cylinders 3# and 4# and the exhaust valve
clearance of cylinders 2# and 4#. Correct it if necessary.
Attention:
It is strictly prohibited to turn the flywheel counterclockwise to avoid damage to the valve system.
Note:
Adjust valve clearance when the engine is cold.
Valve clearance
(Cold state)
Intake valve 0.15~0.25mm
Exhaust valve 0.25~0.35mm
8. Loosen the lock nut and turn the adjusting screw until the specified valve clearance is
reached.
Note:
Turn the adjusting screw clockwise to reduce the valve clearance.
Turn the adjusting screw counterclockwise to increase the valve clearance.
9. Reinstall the removed parts.
Spark Plug
1. Remove the spark plug cap and then remove the spark plug.
2. Remove carbon deposits from the spark plug electrodes.
3. Check whether the electrodes are corroded, whether there is deposit, and whether the
gasket is damaged. Replace the spark plugs if necessary.
Spark plug model: DPR7EA-9
4. Check whether the electrode gap meets the specified value; Replace the spark plugs if
necessary.
5. Install the spark plug and tighten it with a spark plug wrench according to the specified
torque.
Specified torque: 18 Nm
0.8-0.9mm
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