Should I Maintain My Marine Engine Even if I Rarely Use It?

November 2, 2025•By MPS

Should I Maintain My Engine Even if I Rarely Use It?

Many boat owners think maintenance is only necessary for heavily used engines. However, engines that run infrequently—whether it’s a Volvo Penta, Yanmar, Vetus, Nanni, or Sole—can experience more wear and tear than you might expect. Inactivity can be just as damaging as constant use.

Why Infrequently Used Engines Are Vulnerable

Higher wear with low usage: Engines that run sporadically, including popular brands like Volvo Penta and Yanmar, often develop extra wear on moving parts. Limited oil circulation and old oil reduce lubrication, increasing friction.
Corrosion and rust: Saltwater, humidity, and condensation can attack components even when your Vetus, Nanni, or Sole engine sits idle.
Fuel problems: Gas or diesel can degrade over time, clogging fuel lines, filters, or injectors.
Starting issues: Engines that sit unused for long periods can be difficult to start, putting extra stress on the starter and related parts.

Maintenance Tips for Infrequent Use

Run the engine regularly: Even if it’s just once a month, run your Volvo Penta, Yanmar, Vetus, Nanni, or Sole engine with coolant circulation to distribute oil and prevent rust.
Stabilize the fuel: Use a fuel stabilizer for periods of inactivity.
Change oil and filters: Follow manufacturer-recommended service intervals, regardless of hours logged.
Check the cooling system: Flush the engine after use—especially in saltwater—to prevent scale and corrosion.
Battery care: Keep the battery charged and check it regularly.

Long-Term Benefits of Regular Maintenance

Reduced risk of costly repairs.
Reliable starting even after long periods of inactivity.
Longer engine life for all brands, including Volvo Penta, Yanmar, Vetus, Nanni, and Sole.
Maintains the resale value of your boat.

Conclusion

Engines that run infrequently often require more maintenance to prevent wear and breakdowns. Keeping your Volvo Penta, Yanmar, Vetus, Nanni, or Sole engine in good shape ensures reliability, saves money, and gives you peace of mind on the water.