Periodical Check - Yanmar 2 QM 20 Operation Manual

VIII
In order to keep the engine in top running condition, perform regular maintenance checks.
In this way small malfunctions can be detected and corrected before they lead to serious engine failure.
Item
Check and refil
Drain any deposit or dirt
Air venting from F.O. return pipe
Clean fuel filter element
Fuel oil
Replace fuel filter element
Check fuel injection timing
Check fuel injection valve
Check fuel injection sound
Check oil level in crankcase and clutch case
Lubrication (starter chain etc.)
Lub. oil Change lub. oil in crankcase
Replace lub. oil strainer
Change lub. oil in clutch case
Drain water
Check cooling water circulation
Cooling water
Check water pump impeller
Clean thermostat
Check anticorrosive zinc
Retighten bolt
Adjust intake & exhaust valves clearance
Cylinder head Clean pre-combustion chamber
Lap intake & exhaust valves
Check valve stems & valve guides
Check battery electrolyte level
Check lamps (charging Lub. oil warning & C.W. warning)
Others
Check belt tension
Retighten major bolts and nuts
Description First 50 hrs.

PERIODICAL CHECK

Daily Every 100 hrs. Every 250 hrs. Every 300 hrs. Every 500 hrs.
Before refiling
Every 50 hrs.
After operation
in cold water
Note
fig. 1
fig. 2
fig. 3,4
fig. 5
fig. 6
fig. 7,8