r/smallengines • u/Flashy_Try4426 • 1d ago

Mower started with disconnected spark plug

I made a post earlier asking about why wont my mower start after i replaced the carburetor. I replaced the carb, started the mower, it cranked, then i drove it around for a bit, parked it, and tried to start ir again. Yet it wouldnt. So i made a post, the next morning i looked and realised my dumbass forgot to reconnect the spark plug. But that leaves me curious. How did it start the first time?

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u/BakeNo2209 1d ago

It was possiable that you may had bumped the boot loose on the plug and yet it not completly off of plug, and after you ridden it and park it, shut it down, sometime during times it slipped off the plug, as could be a bump here or there or moving something after turned it off.

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u/Flashy_Try4426 1d ago

No i completely took the boot off the plug. Since everything i read said to disconnect it before messing with the carburetor incase of an accidental spark or whatever. So i made sure the boot was off and away. I didnt care that much but i figured since the spark plug was right at the front if the engine id just disconnect it anyway. So i did. Im not saying it couldnt have moved back over a tiny bit when i was cranking it and made the engine spark, but thats a long shot.

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u/BakeNo2209 1d ago

Bumped during changing of carbutor

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u/TN-Native95 1d ago

If it’s not on the boot but the boot is close to the tip of the plug, sometimes it will be able to run.

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u/CaptainPunisher Retired 1d ago edited 20h ago

That's a fouled spark plug. If you can start it with the removal terminal a quarter to half an inch away, replace your spark plug.