Yamaha EF4000DFW, Owner'S Manual

Page: 28 / 372

– 21 –
PERIODIC MAINTENANCE
Safety is an obligation of the owner. Periodic inspection, adjustment and lubrication will
keep your generator in the safest and most efficient condition possible. The most impor-
tant points of generator inspection, adjustment, and lubrication are explained on the fol-
lowing pages.
WARNING
If you are not familiar with maintenance work, have a Yamaha dealer do it for you.
Maintenance chart
WARNING
Stop the engine before starting maintenance work.
NOTICE
Use only Yamaha specified genuine parts for replacement. Ask an authorized
Yamaha dealer for further attention.
Item Routine
Pre-
operation
check
Every
6 months
or 100 Hr
12 months
or 300 Hr
Spark plug
• Check condition.
• Clean and replace if necessary.
1
Fuel • Check fuel level and leakage.
1
Fuel hose
• Check fuel hose for cracks or damage.
• Replace if necessary.
1
Engine oil
• Check oil level in engine.
1
• Replace.
1
(*1)
Air filter element
• Check condition.
• Clean.
1
(*2)
Muffler screen
• Check condition.
• Clean and replace if necessary.
1
Fuel tank filter • Clean and replace if necessary.
1
Fuel strainer • Clean and replace if necessary.
1
Crankcase breather
hose
• Check breather hose for cracks or
damage.
• Replace if necessary.
1