Yamaha EC340M 1988 Owner's Manual page 57

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PERIODIC MAINTENANCE
Check point
Every
20 hrs. or
40 hrs. or
80 hrs. or
400 km
800 km
1,600 km
(250 mi)
(500 mi)
(1,000 mi)
When
necessary
Seasonally
ENGINE:
Tightness of bolts and nuts
O
O
Bends, cracks and wear
O
O
Abnormal noise
0
0
Loose connection and breaks of fuel and pulse pipes
0
0
Loose connec~rion and breaks of oil pipes
0
0
Loose connec~lion and breaks of oil delivery pipe
0
0
Manual rope starter system
0
0
Carburetor
• Operation of starter jet
O
O
• Mixing adjuster (pilot screw)
O
O
• Idling speed adjustment
0
0
Operation and:adjustment of oil pump
0
O
Ignition timing
0
Engine compr£~sion
O
O
Cylinder head/exhaust pipe decarloonization
0
Spark plug condition, gap and cleaning
O
O
Tightening of the cylinder head" °
O
° " Retighten every 10 hours from the first use.
- -
4 9
- -

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