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Energy · 6 min read

Generators and Carbon-Monoxide Safety

A generator's exhaust is invisible, odourless and lethal. The starting sequence matters — but the safety rule is the one that keeps your family alive.

The rule that saves lives first

A generator's exhaust is invisible, odourless carbon monoxide, and it kills fast. Run it outdoors only, at least 3 m from any building, never in a garage, basement or near windows — and never wire it directly into a house socket (back-feeding can kill line workers and start fires). If anyone gets a headache, dizziness or nausea near a running engine, get to fresh air immediately.

Starting it, step by step

  • Prep: check oil (between MIN and MAX), fill fuel leaving 3–4 cm of air space, fuel tap ON, load switch OFF.
  • Start: close the choke, pull the cord sharply; once running, open the choke after ~30 seconds and warm up 2–3 minutes.
  • Connect: add devices one at a time, least powerful to most, and never exceed 80% of rated output.
  • Stop: disconnect all devices, run unloaded 2–3 minutes, switch off, then close the fuel tap.

Fuel discipline

Petrol in a sealed metal jerry can lasts 12+ months (up to ~24 with a quality stabiliser). A sour, varnish-like smell or a darkening of the liquid means it's degrading — "dead" fuel clogs injectors and strands you. Store fuel cool, sealed, and away from living spaces and ignition sources.

Make it last

A generator is a sprinter, not a marathon runner: run it in bursts to charge batteries and drive heavy loads, then switch to stored power. Continuous running burns fuel you can't replace — and broadcasts your location.

Sources

Test your blackout readiness 5 min · including generator safety Build my blackout kit 90 sec · items from this guide pre-selected

This guide is published by Systems Fail Lab for general education and preparation. It is not medical, legal, or financial advice. See our full Disclaimer.

Updates & corrections

  • 2026-06-03 — Softened absolute claims; added explicit sources for medical and statistical references.
  • 2026-05-28 — Methodology review; verified primary sources still authoritative.
  • 2026-01-01 — Initial publication.

Spot an error? Email corrections@systemsfaillab.com — we publish corrections, dated.