Jinan QingQi QM50QT-6, Manual

Page: 46 / 57

46
4.Familiar trouble about the engine and way of the elimination
Position Trouble Reason The eliminating the trouble
The cylinder
head and the
cylinder body are
over hot
1.There is overmuch carbon deposit on the piston or in
the firebox
1.Clean out the carbon deposit
The noise is
larger
1. The piston pin hole and the piston pin are fretted
2. The bearing in the small end of the lever is worn
3. The bearing in the big end of the lever is worn
4. The shaft bends
5. The main shaft bearing is worn
6. The rotating part of the engine is short of oil
7. The cam shaft or the shaft slipcover is worn 1. Replace the piston and the pin
2. Replace the bearing
3. Replace the bearing
4. Replace the crank shaft
5. Replace the bearing
6. Replenish the oil
7. Replace the camshaft or the bushing
The power is
lack for a while 1. The spark plug is bad
2. The engine is over hot
1. Replace the spark plug
2. Cool the engine and avoid running for a
long time
Crank
shaft/
Crank
shaft box
The power is
lack for a long
time
1. the oil route is not expedite
2. The mix rate is impropriety
3. Stack carbon in the cylinder and the exhaust tube
4. The piston
（
ring
）
and the cylinder are worn
1. Dredge the oil route
2. Adjust
3. Clean out the carbon deposit
4. Replace the cylinder and the piston
（
ring
）