Why is carbon monoxide the main danger?
Gasoline and propane engines produce carbon monoxide, a gas you cannot see or smell. It can build up in a house, garage, barn or crawl space within minutes, even with doors or windows open.
The CPSC and CDC both warn that generators must be used outdoors, well away from the home. Install battery-powered carbon monoxide alarms and test them.
Even an open garage door is not enough ventilation. People have died with the generator just outside a door or window. Distance and direction of exhaust are what protect you. Opening windows or running a fan does not make indoor use safe. If an alarm sounds or anyone feels ill, get everyone including pets outside and into fresh air first.
Where should you put a generator?
Outdoors, on a level surface, and far enough from the house that exhaust cannot be drawn in through windows, doors or vents. Follow the distance in the manufacturer's manual and in CPSC guidance, and aim exhaust away from living spaces.
Protect it from rain and snow without enclosing it. Do not run it in a garage, shed, porch or under a tarp that traps fumes.
Place it where rain cannot pool beneath it and where children and animals cannot reach it. A stable, level pad of gravel or concrete is better than soil or grass.
What are symptoms of carbon monoxide poisoning?
Headache, dizziness, weakness, nausea and confusion are common signs, and people sometimes mistake them for the flu. If you or someone else has these symptoms while a generator runs, get into fresh air immediately and call emergency services.
Pets and children can be affected first. Do not wait to see whether symptoms pass.
Treat any alarm sound as real. Leave the building, then call emergency services from outside, and do not return until responders say it is safe.
How do you handle fuel safely?
Turn the engine off and let it cool before refueling. Hot parts can ignite spilled fuel. Store fuel in approved containers, away from the house and any ignition source, and follow local rules.
Keep a record of when you bought fuel, and use or replace old fuel. Stale fuel causes hard starts and rough running.
Check the fuel cap and lines for cracks and leaks before each use. If you smell fuel, do not start the engine, and fix the problem first.
- Shut off and cool before refueling
- Approved containers, stored outdoors
- Away from pilot lights and sparks
- Label the date of purchase
What routine care keeps it reliable?
Follow the maintenance schedule in the manual: oil level, air filter, spark plug, fuel system and battery for electric start. Run the generator under load for a short time on a regular schedule so it stays ready.
A generator that sat for a year may not start when you need it. Test it before storm season and after any repair.
After use, wipe the unit down, check for loose parts, and store it dry. Fresh oil and a clean air filter make a big difference to engine life. Keep a maintenance log by the generator with the date, hours run, oil changes and any repairs. It helps you spot a pattern before a failure, and it helps a technician.
- Oil level and condition
- Air filter and spark plug
- Fuel lines, cap and tank
- Battery charge for electric start
- Test run under load
How do you use cords and connections safely?
Use heavy-duty cords rated for the load and outdoor use, and keep them in good condition. Do not overload a cord or run it under rugs. Keep connections dry.
Power to the house should go through a properly installed transfer switch, installed by a licensed electrician. Never backfeed power through an outlet.
Replace damaged or frayed cords, and do not splice them. Keep cords out of walkways to prevent tripping. Look at cord ratings for the load you are connecting, and use as short a cord as will reach.
What about electrical shock and fires?
Keep the generator dry and grounded as the manual directs. Do not touch it with wet hands or while standing in water. Keep children and pets away while it runs.
Keep a fire extinguisher nearby and know how to use it. Call your local fire department if you want advice on placement.
Teach every adult in the home how to start and stop the unit, and how to shut it off in a hurry. Print a short card of steps and tape it nearby.
Key takeaways
- Run generators outdoors, away from windows, doors and vents.
- Use battery-powered carbon monoxide alarms.
- Let the engine cool before you refuel, and store fuel safely.
- Test and service the generator before storm season.
Sources and further reading
Last reviewed: November 12, 2026. Written by the Rural Farm Life Editorial Team. See our editorial policy.