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

	Lubrication and Maintenance Service Intervals
Item	Daily/Before Every Startup	250 Hour/6 Month	500 Hour/12 Month	2000 Hour/24 Month	Service As Required
Check Engine Oil Level and Coolant Level	•
Check Sea Water Strainer	•
Check Air Cleaner Dust Unloader Valve & Restriction Indicator Gauge 1	•
Visual Walkaround Inspection	•
Drain Water From Fuel Filter	•				•
Change Engine Oil And Replace Oil Filter 2		•
Service Fire Extinguisher		•
Service Battery		•
Inspect and Replace Zinc Plugs		•
Check Belt Tension and Wear (Manual Tensioner)		•
Check Engine Mounts		•
Replace Crankcase Vent Filter (If Equipped)			•
Clean Crankcase Ventilation Assembly			•
Check Air Intake Hoses, Connections, & System			•
Replace Fuel Filter Elements			•
Check Automatic Belt Tensioner and Belt Wear			•
Check Cooling System			•
Coolant Solution Analysis-Add SCAs as required			•
Inspect and Clean Heat Exchanger Core and Aftercooler Core (If Equipped)			•
Check Engine Speeds			•
Check Engine Electrical Ground			•
Check Crankshaft Vibration Damper (6-Cylinder)				•
Pressure Test Cooling System				•
Inspect and Repair Sea Water Pump				•
Check and Adjust Engine Valve Clearance				•
Flush And Refill Cooling System				•
Test Thermostats				•
Add Coolant					•
Replace Air Cleaner Element					•
Service Dry Air Cleaner Element					•
Replace Alternator Drive Belt					•
Check Front PTO (If Equipped)					•
Bleed Fuel System					•