Komatsu Marine Engine Daily Service Checklist & Guide
September 8, 2026
- Daily Servicing Tasks for Komatsu Marine Engines: 6M, S6D, SA6D & SAA6D
- browse our marine spare parts
- request a quote
- Which Komatsu Engines Does This Guide Cover?
- Komatsu 6M Series
- Komatsu 108 Series
- Komatsu 125 Series
- Komatsu 140 Series
- Komatsu 170 Series
- What Should You Check Daily on a Komatsu Marine Engine?
- 1. Check the Engine Oil Level
- What If the Oil Level Is Falling?
- What If the Oil Level Is Rising?
- 2. Look at the Oil Condition
- 3. Check for Oil Leaks
- 4. Check the Coolant Level
- Where Should You Look for Coolant Leaks?
- 5. Check the Seawater System
- 6. Inspect the Sea Strainer
- 7. Look at the Seawater Pump
- browse Alfa Marine's marine spare-parts catalogue
- What About the Impeller?
- 8. Check the Fuel Supply
- 9. Inspect the Fuel/Water Separator
- 10. Check Fuel Filters for Warning Signs
- 11. Check the Air Intake
- 12. Inspect the Turbocharger Externally
- 13. Watch the Exhaust
- Black Smoke
- Blue or Blue-Grey Smoke
- White Smoke
- 14. Monitor Oil Pressure
- 15. Monitor Coolant Temperature
- 16. Compare Exhaust Temperatures Where Available
- 17. Listen and Feel for Changes
- 18. Inspect Belts, Hoses and Clamps
- 19. Check for Fuel and Exhaust Leaks
- 20. Look for Chafing and Loose Components
- 21. Check the Starting and Charging System
- 22. Don't Forget the Marine Gear
- 23. Review Alarms—Don't Just Acknowledge Them
- 24. Record Engine Hours
- 25. Keep a Daily Komatsu Engine Log
- Twin Komatsu Engines? Use the Comparison
- Daily Checks for Komatsu S6D108 & SA6D108
- Daily Checks for Komatsu S6D125, SA6D125 & SAA6D125
- Daily Checks for Komatsu S6D140, SA6D140 & SAA6D140
- Daily Checks for Komatsu S6D170, SA6D170 & SAA6D170
- Daily Checks for Komatsu 6M Engines
- Daily Servicing Does Not Replace Scheduled Maintenance
- Daily Komatsu Marine Engine Checklist
- What Komatsu Marine Parts Might Daily Inspection Identify?
- browse marine engine brands
- What Information Should You Send When Ordering Komatsu Engine Parts?
- request a Komatsu parts quote
- Frequently Asked Questions
- What should be checked daily on a Komatsu marine engine?
- Should engine oil be changed every day?
- Should I check the fuel/water separator daily?
- Why does my Komatsu engine run hot only under load?
- Does black smoke mean the injectors are bad?
- Should I inspect the turbocharger every day?
- Why should I record oil pressure and temperature?
- Are Komatsu engine parts interchangeable between related models?
- Request Komatsu Marine Engine Spare Parts
- request@alfamarinespareparts.com
- Browse Marine Spare Parts
- Final Word
