- Use a stabilizer to treat your boat’s fuel. We recommend Pennzoil Fuel Stabilizer, PRI-G, or Stabil. Run your engine for 10 minutes after adding the stabilizer and let it circulate.
- Use an aerosol fogging solution for the engine cylinders to coat the inside of the engine.
- Drain the engine completely.
- Change engine oil to prevent the possibility of corrosion and moisture.
- Drain gear-case lubricant. If the lubricant is amber-colored or clear, the seals are in good shape.
- Check the coolant levels for freshwater cooling systems. Add as needed.
- Fill the water strainers with antifreeze.
- Run antifreeze through the raw water-cooling system.
- Use antifreeze in the air conditioning system.
- Replace the anodes and zincs.
- Drain gear oil and add fresh lubricant for outdrives.
- Drain the water heater and freshwater system. Put antifreeze in the freshwater system.
- Drain the shower sump.
- Remove all food from the watercraft.
- Remove all cushions and electronics.
- Secure all ports and cockpit drains.
- Plug exhaust ports.
- Turn off all circuit breakers.
- Shrink wrap the craft if outdoors.
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