Lawn mower
Petrol mower will not start
Fuel, air, spark — check them in that order and most mowers come back to life.
Before you start
Petrol is highly flammable and the blade can turn while you work. Lead off, engine cool, outdoors only.
- 1
Make it safe
Pull the spark plug lead off before going anywhere near the blade, and work outdoors.
- 2
Replace old fuel
Drain fuel that has sat for months and refill with fresh. Stale petrol is the single most common cause.
- 3
Check the air filter
Take the filter out. If it is grey and clogged, clean or replace it.
- 4
Check the spark plug
Remove the plug. A black, oily or wet tip means it needs cleaning or replacing.
- 5
Prime and pull
Refit everything, press the primer bulb the number of times in the manual, and start it on a hard flat surface.
- 6
Clear the deck
Tip it with the fuel cap side up and scrape out packed grass so the engine is not fighting the blade.
When to stop and get help
If it still will not fire with fresh fuel, clean filter and a new plug, the carburettor likely needs stripping — worth a small-engine shop.
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