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Boat care, organized by season.

A practical maintenance, winterization and spring-prep checklist for boat owners across Northern Illinois. Save the page, share it with your household or download the printable field guide.

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Owner reference, not a service manual.Always follow the vessel, engine and equipment manufacturers' procedures. Stop and obtain qualified help when you find a leak, alarm, damaged component or unsafe condition.
01

Routine maintenance

Keep a reliable record of the systems that protect safe operation and reduce preventable downtime.

  • Engine hours, service dates and fluid records
  • Oil, filters, gear lubricant and manufacturer intervals
  • Battery, charging, wiring and shore-power condition
  • Steering, controls, propeller, drive and anodes
  • Cooling-water flow, hoses, clamps and impeller schedule
  • Safety equipment, navigation lights, horn and bilge pumps
02

Winterization

Freeze protection must follow the manufacturer procedure for every engine, drive, plumbing and onboard system.

  • Fuel treatment and documentation
  • Engine oil, filters and drive lubricant
  • Raw-water circuits and freeze-sensitive components
  • Freshwater, sanitation and onboard plumbing
  • Battery storage or maintenance plan
  • Cover, ventilation, drainage and spring notes
03

Spring preparation

Reverse storage work carefully, inspect each system and complete an appropriate operational check before launch.

  • Reinstall drains, hoses, batteries and removed parts
  • Inspect hull, running gear, wiring, belts and fluids
  • Recommission water and sanitation systems
  • Test steering, shift, throttle, trim and electronics
  • Check for leaks, alarms and proper cooling flow
  • Complete a controlled sea trial and record findings

Need help with the work?

Turn the checklist into a service plan.

Marine Werks provides onsite marine maintenance, seasonal preparation, repairs and parts support across the Chain O' Lakes region and the Illinois Lake Michigan shoreline. Call to confirm your location, scope and availability.

Call 847-529-2809Request service