Properly storing a used generator is crucial for its longevity, reliable performance, and readiness for future use. It involves careful preparation and selecting an appropriate environment to protect the equipment from environmental damage.
Preparing Your Generator for Storage
Before placing your generator in storage, especially for extended periods, several steps are essential to prevent issues like rust, gummed-up fuel systems, and dead batteries.
Fuel System Preparation
The approach to fuel depends on the storage duration:
- Short-Term Storage (under 3 months):
- Add a high-quality fuel stabilizer to the fuel tank according to the manufacturer's instructions.
- Run the generator for 10-15 minutes after adding the stabilizer to ensure it circulates through the carburetor and fuel lines.
- Long-Term Storage (over 3 months):
- Completely drain all fuel from the tank.
- Close the fuel valve, if present, and then run the generator until it completely runs out of fuel and stalls. This ensures the carburetor and fuel lines are dry, preventing fuel varnish and gumming.
- Safety Note: Always drain fuel outdoors or in a well-ventilated area, away from ignition sources. Use an approved fuel container.
Oil Change
Change the engine oil and replace the oil filter (if applicable) while the engine is still warm. This removes old, contaminated oil that can contain corrosive byproducts, replacing it with fresh, protective lubricant.
Spark Plug and Cylinder Protection
To prevent internal engine rust and corrosion:
- Remove the spark plug.
- Add a small amount (approximately one teaspoon) of clean engine oil or a specialized "fogging oil" into the spark plug hole.
- Slowly pull the recoil starter cord a few times (with the spark plug still out) to distribute the oil throughout the cylinder walls.
- Reinstall the spark plug.
Battery Care (for Electric Start Models)
For generators with an electric start:
- Disconnect the battery cables (negative first, then positive).
- Clean the battery terminals to remove any corrosion.
- Store the battery in a cool, dry place.
- Use a trickle charger or battery maintainer to keep it charged, preventing deep discharge which can damage the battery.
Cleaning and Inspection
Thoroughly clean the exterior of your generator. Remove any dirt, grass, or debris from the cooling fins, air filter housing, and other surfaces. This also provides an opportunity to inspect for any loose bolts, damaged components, or signs of wear that might need attention before the next use.
Choosing the Right Storage Location
The environment where your generator is stored is just as important as its preparation. The ideal location will shield it from elements that cause damage.
Your generator needs to be housed in a cool, dry, and ventilated location when not in use. This protects it from:
- Rust and Corrosion: Primarily caused by moisture. A dry environment is critical.
- Damage from Debris, Dust, and Dirt Buildup: A protected location keeps the generator clean and prevents accumulation that can clog air filters or moving parts.
- Extreme Temperatures: High heat can degrade plastic components and seals, while freezing temperatures can affect battery performance and residual fluids.
Consider these factors for your storage area:
- Cool: Avoid direct sunlight or areas prone to extreme heat fluctuations (e.g., attics without ventilation).
- Dry: Garages, sheds, or basements are generally suitable, provided they are not damp. Keep the generator off the ground, ideally on a pallet or blocks, to prevent moisture absorption from the floor.
- Ventilated: Good airflow helps prevent condensation and dissipates any residual fuel vapors, making the area safer.
- Secure: A locked area provides protection from theft.
Ideal Storage Environment Summary
| Condition | Benefit |
|---|---|
| Cool | Prevents material degradation |
| Dry | Inhibits rust and corrosion due to moisture |
| Ventilated | Reduces condensation, dissipates fumes (if any) |
| Covered | Protects from dust, dirt, debris, and physical damage |
Long-Term Storage Checklist
For comprehensive protection, follow this checklist when storing your generator for an extended period:
- Fuel Management: Either fully stabilize fuel (for short-term) or completely drain all fuel from the tank and carburetor (for long-term).
- Oil Change: Replace old engine oil and filter with fresh oil.
- Cylinder Protection: Apply fogging oil or a small amount of engine oil into the cylinder via the spark plug hole.
- Battery Maintenance: Disconnect, clean, and store the battery with a trickle charger in a cool, dry place.
- Thorough Cleaning: Clean the exterior, air filter, and cooling fins.
- Covering: Use a breathable, weather-resistant generator cover or a heavy tarp to protect against dust, dirt, and minor impacts while allowing some air circulation. Avoid airtight covers that can trap moisture.
- Placement: Store the generator in a cool, dry, well-ventilated location, ideally off the ground, and away from direct sunlight or corrosive chemicals.
- Tire Care (if applicable): If your generator has wheels, consider placing it on blocks to keep the tires off the ground, preventing flat spots.
Regular Monitoring During Storage
Even when properly stored, it's beneficial to periodically check on your generator. Ensure the cover is intact, verify the battery's charge if using a trickle charger, and briefly inspect for any signs of pest activity or environmental changes in the storage area.
