Periodic maintenance, Maintenance chart – Yamaha EF4000DE User Manual
Page 30
– 25 –
No.
Item
Remarks
Pre-Ope-
ration
check
(daily)
Initial
Every
1
month
or 20 Hr
3
months
or 50 Hr
6
months
or 100 Hr
12
months
or 300 Hr
**
Check condition.
1.
Spark Plug
Adjust gap and
0
clean. Replace if
necessary.
**
Check and adjust
2.*
Valve Clearance
when engine is
0
cold.
Check breather
**
hose for cracks or
0
3.*
Crankcase
damage. Replace
breather system
if necessary.
4.*
Idle speed
Check and adjust
0
engine idle speed.
Check for leakage.
Retighten or
0
**
*replace gasket
5.
Exhaust System
if necessary.
Check muffler
screen and spark
arrester. Clean/
0
replace if
necessary.
Check oil level
0
6.
Engine Oil
Replace
0
0
**
Clean.
7.
Air Filter
Replace if
0
necessary.
Clean fuel cock
8.
Fuel Filter
and fuel tank
0
filter. Replace if
necessary.
*
: It is recommended that these items be serviced by a Yamaha dealer.
**
: Related to emission control system.
**
AE00401
PERIODIC MAINTENANCE
AE00403
MAINTENANCE CHART
Regular maintenance is most important for best performance and safe operation.
w
Stop the engine before starting maintenance work.
7WV-9-11 A 10/16/03 1:29 PM Page 25