Operating Guide

Maintenance
26 Owner’s Manual for 60 Hz Air-Cooled Generators
Service Schedule
NOTE: Contact an IASD or visit www.generac.com for additional information on replacement parts.
Maintenance Log
Battery Inspection and Charge Check
Dates Performed:
Oil, Oil Filter, Air Filter, and Spark Plug Replacement
Dates Performed:
Valve Adjustment
NOTE: Not required on 14 or 18 kW units with 816cc engines.
Dates Performed:
Service
Daily If Running
Continuously or
Before Each Use
Every
Year
Schedule A
Every Two Years
or 200 Hours
Schedule B
Every Four Years
or 400 Hours
Inspect enclosure louvers for dirt and debris * ●
Inspect lines and connections for fuel or oil leaks ●
Check engine oil level ●
Inspect for water intrusion ** ●
Perform fuel system leak test ●
Check battery condition, electrolyte level, and state
of charge
● ● ●
Replace engine oil and oil filter † ● ●
Replace engine air filter ●
Clean; inspect spark plug gap; replace if necessary ●
Inspect/adjust valve clearance (where applicable) ‡ ●
Inspect/clean sediment trap
See local codes and guidelines.
Contact the nearest IASD for assistance if necessary.
* Remove any shrubs or tall grasses which have grown within 3 ft (0.91 m) of intake and discharge louvers on enclosure sides.
Clean any debris (dirt, grass clippings, etc.) which may have accumulated inside enclosure.
** Verify all sources of potential water intrusion such as water sprinklers, roof run-off, rain gutter downspouts, and sump pump
discharges are directed away from generator enclosure.
† Change engine oil and filter after first 25 hours of operation. In cold weather conditions (ambient below 40 °F [4.4 °C]), or if unit
is operated continuously in hot weather conditions (ambient above 85 °F [29.4 °C]), change engine oil and filter every year or 100
hours of operation.
‡ Inspect/adjust valve clearance after first 25 hours of operation. (Excludes units with hydraulic lifters. See Engine.)