Lubrication and Maintenance Service Interval Chart—Propulsion and Prime Power Units

	Lubrication and Maintenance Service Intervals
Item	Daily/Before Every Startup	250 Hours or 6 Months	500 Hours or 12 Months	2000 Hours or 24 Months	As Required
Check Engine Oil and Coolant Level	•
Check Air Cleaner Restriction Indicator Gauge (if equipped) 1	•
Visual Walkaround Inspection	•
Check Sea Water Strainer (Heat Exchanger Engines)	•
Service Fire Extinguisher		•
Service Battery		•
Change Engine Oil and Replace Oil Filter 2		•
Check Coolant Pump Weep Hole Foam Filter		•
Check Engine Mounts		•
Inspect and Replace Zinc Plugs (Heat Exchanger Engines)		•
Clean Crankcase Ventilation Assembly			•
Replace Closed Crankcase Vent Filter (If Equipped)			•
Check Air Intake Hoses, Connections, & System			•
Check Engine Electrical Ground Connections			•
Check Automatic Belt Tensioners and Belt Wear			•
Check Cooling System			•
Coolant Solution Analysis-Add SCAs as required			•
Pressure Test Cooling System			•
Inspect and Clean Heat Exchanger Core (Heat Exchanger Engines)			•
Check and Adjust Engine Speeds				•
Flush Cooling System				•
Inspect and Repair Sea Water Pump (Heat Exchanger Engines)				•
Adjust Engine Valve Clearance				•
Checking Crankshaft Vibration Damper (If Equipped) 3				•
Replace Fuel Filter/Clean Water Separator Bowl when Alarm Sounds 4					•
Add Coolant					•
Test Thermostats					•
Service Air Cleaner Element					•
Replace Alternator Belt					•
Drain Fuel Filter Water Separator Bowl					•
Bleed Fuel System					•
Check Fuses					•
Check Air Compressor (if equipped)					•