not need any adjustment. The turnover number should be recorded preparing for the assembly.
The engine should be started and operated for 3 minutes to make sure it is operated in normal operation
temperature.
The idle adjustment screw should be adjusted to make the engine speed in 1800rpm;
The mixture control screw should be rotated to the end gently.
At this time, the engine should be shut off (if it is not shut off, to check whether the air filter interface is leak,
whether the screw is tightened, whether the inlet of air filter is plugged).
The mixture control screw should be withdrawn for one circle;
Re-starting, the idle speed screw should be adjusted to make the rotation speed achieve 2000-2500rpm;
The mix screw should be adjusted slowly (anti-clockwise) until the engine speed achieving the highest (The mix
screw would be withdrawn from 2 circles at most);
The idle adjustment screw would be reset to make the engine speed drop to 1800±100rpm;
Draw the throttle for several times to check whether the idle speed rotation is stable.
Emissions would be tested and be compared with stipulation standard.
Cylinder head
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