🌿 Garden🟡 Extra Care
User confirmed
Replace the spark plug
Lawn mower · Won't start
LIKELY CAUSE
Fouled or gapped spark plug
Success rate
80% success
Successful repairs
696
People tried
870
Repair time
20 min
Difficulty
Easy
Estimated cost
€6
Work on a cold engine. Keep fuel away from heat and sparks.
Shared by
T
Tom
Fix Score 81
TOOLS
Required tools
Spark plug socketGap tool
PARTS
Parts used
Correct spark plug for the engine
REPAIR GUIDE
Step by step
- 1Disconnect the bootPull the rubber boot off the plug. Do not use the wire as a handle.
- 2Unscrew the plugUse a spark plug socket. If the electrode is black, oily, or the porcelain is cracked, replace it.
- 3Set the gapCheck the engine sticker — often 0.7 to 0.8 mm. Hand-thread the new plug, then snug it a half turn.
- 4Refit the boot and pullIt should fire on the first or second pull if fuel is fresh.
YOUR RESULT MATTERS
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Next most successful: Drain the stale fuel (75%)
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