Advice from Mercury

Apr 24, 2025

Spring is filled with checklist but the engine manufacturer provides a simple checklist that gets right down to business.

Inspect and Maintain Your Boat Engine

Routine boat engine maintenance is critical to ensuring smooth performance throughout the season. Here’s what to check:

  • Engine – If you didn’t change the oil and filter as part of your winterization process, do it now. Make sure to use high-quality marine engine oil that meets your outboard’s specifications.
  • Gear lube – Check for milky or discolored gear oil which can indicate water intrusion. If you see issues, have a Mercury Authorized Dealer inspect the seals.
  • Propeller check – Inspect your boat propeller for dings or damage. Remove it to check for fishing line wrapped around the shaft then apply Mercury 2-4-C Marine Grease before reinstalling.
  • Battery maintenance – Reinstall your boat battery, clean the terminals and ensure it holds a full charge before heading out.
  • Fuel System– Top off your boat fuel tank and treat it with a Mercury Fuel Care System product to keep fuel fresh and prevent ethanol-related issues.
  • Trim and steering fluid – Check your trim fluid and hydraulic steering fluid levels. Low fluid can affect steering responsiveness and trim operation, making handling difficult on the water. If the levels are low, top them off with the recommended fluid. Also inspect for any leaks or signs of air in the system and address any issues before your first trip.

Trailer Maintenance for Safe Transport

A reliable trailer is essential for getting your boat to and from the water safely. Before hitting the road, complete these steps:

  • Tires – Check for cracks, excessive tread wear and proper air pressure.
  • Wheel bearings – Ensure they are properly greased to avoid overheating and failure.
  • Trailer lights – Verify that blinkers, brake lights and running lights work properly.
  • Winch and tie-down straps – Inspect for wear and tear and replace if necessary.

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