Qianjiang QJ150T-10, Operation And Maintenance Manual, Page: 29 / 131

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Carburator
Idle adjustment
* Attention
The idle adjustment should be made when the engine is
warm.
It should be conducted after the warm-up of engine.
Start engine and connect the turnmeter of engine.
Adjust the accelerator pull wire and bolt stopper to specifiy
the winding number.
Winding number at idle speed
：
1500±100rpm/min
Readjust the idle adjustment bolt when the gyration at idle
speed is instable or there is dificulty of slight acceleration.
Ignition timing
*Attention
Check the ignition system if the ignition timing is
incorrect.
Remove the fixed bolt.
Dismantle the end cover of magnetor.
Use the ignition timing light to inspect and confirm
ignition timing.
Cylinder pressure
It should be made when the engine is warm.
Remove the guard plate of car body.
Dismantle spark plug.
Install cylinder pressure meter.
Full throttle, press "Start" to run motor and measure the
cylinder pressure.
Compression pressure ： 1.25Mpa/1500rpm
Check the following items if the compression pressure is
too low:
—Cylinder head gasket is damaged
—Damage of piston ring
—Ring wear
—Piston
，
cylinder , valve wear
Check the combustion chamber and the carbon laydown on
the top of pistion if the compression pressure is too high.
Gear mobile oil
Carburettor
Fixed pipe clamp
End cover of
magnetor
Fixed bolt
Measure the
cylinder’s pressure