Boat Engine Hours Maintenance Calculator
Boat Engine Hours Maintenance
Track engine hours and determine when maintenance is due for oil changes, impeller replacement, lower unit service, and other scheduled boat engine care.
Formula
Oil Change Interval = 100 hours; Impeller Replacement Interval = 300 hours; Lower Unit Service Interval = 500 hours; Hours Remaining = Interval - (Current Hours - Hours at Last Service)
Frequently Asked Questions
How often should I change boat engine oil?
Most marine engine manufacturers recommend changing oil every 100 hours of operation or at least once per year, whichever comes first. New engines may require a break-in oil change at 20 to 25 hours.
When should I replace my water pump impeller?
Replace the water pump impeller every 300 hours or every two to three years. If you notice reduced water flow from the tell-tale, replace it immediately regardless of hours.
What is considered high hours on a boat engine?
For gasoline inboard engines, 1,500 hours is considered high. Diesel engines can run 5,000 or more hours. Outboard engines typically last 1,500 to 3,000 hours with proper maintenance.
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