Yes, you should store your boat with a full tank of gas, but with proper preparation:
Why Fill the Tank:
- Prevents condensation from forming in empty space
- Reduces air exposure that can cause fuel degradation
- Minimizes the risk of water contamination
- Prevents fuel system components from drying out
Essential Fuel Preparation Steps:
- Add marine fuel stabilizer before filling (follow manufacturer's ratios)
- Fill the tank completely to minimize air space
- Run the engine for 10-15 minutes after adding stabilizer to circulate the treated fuel
- Top off the tank after engine run to account for fuel consumed
Fuel Stabilizer Benefits:
- Prevents fuel oxidation and gum formation
- Protects fuel system components
- Maintains fuel quality for 12-24 months
- Reduces potential starting problems in spring
Additional Considerations:
- Use ethanol-free fuel if available for long-term storage
- Consider adding fuel system cleaner before storage
- If storing longer than one season, consider draining and refilling with fresh fuel
- Check local regulations about fuel storage in storage facilities
Engine Preparation:
- Change the engine oil before storage
- Fog the engine cylinders if recommended by the manufacturer
- Replace the fuel filter if it hasn't been changed recently