Marine diesel engine checklists and owner tools

Turn observations into a useful record for maintenance, quotations and diagnosis. Your entries stay in this browser unless you choose to download or print them.

Boat owner documenting marine engine alarm and operating evidence — Specific evidence helps a technician understand what happened before components are disturbed.

Maintenance checklist

Tick only work you have actually inspected or completed. Print or save the browser page for your records.

Check engine and bilge for new oil, fuel, coolant or seawater Check oil and coolant against the model manual Open and inspect the raw-water path and strainer Inspect belts, hoses, clamps, mounts and wiring Start and confirm alarms clear and cooling water flows Record charging voltage, temperature and unusual smoke or sound

Engine hours Notes

Fault evidence record

Capture what happened without repeatedly restarting the engine.

Engine model and serialEngine hoursDate and locationRPM when it happenedAlarm or gauge readingSmoke colour / exhaust water

Timeline and observations

Repower measurement worksheet

Record measurements in millimetres and have the installer validate them against dimensioned drawings.

Existing engine and driveAvailable length (mm)Available width (mm)Available height (mm)Mount centres (mm)Shaft centre height (mm)Exhaust diameter (mm)Removal opening (mm)

Access and system changes

Marine engine quote comparator

Compare installed scope, not the headline engine price.

Quote item	Supplier A	Supplier B
Engine / service
Drive and ratio
Controls and electrical
Cooling and exhaust
Propeller / alignment
Labour and travel
Haul-out and sea trial
Warranty party
Installed total

Used marine engine inspection scorecard

This is an evidence checklist, not a mechanical verdict. A qualified surveyor or mechanic should perform the technical inspection.

Identification plates match the records Engine was genuinely cold before starting Cold start and smoke were observed Loaded operating temperature was recorded Maximum loaded rpm was checked Oil, coolant and exhaust-water leaks were checked Service invoices support the claimed history Gearbox or drive and propeller history were checked

Risks and follow-up tests

Service log entry

DateEngine hoursWork performedParts and fluidsTechnician / ownerNext due date or hours

Readings and observations