Vanguard Briggs and Stratton popping backfire

Hello from Estonia guys.

I got new vanguard briggs and Stratton pressure washer. Fuel is E5 ( not more that 5% ethanol)

Engine popping on load and during idle , I got some little video about this problem

Any advices ? The machine is new…

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Probably a plug or coil failing

Check the air filter

My previous neighbors were from Estonia. They were childhood sweethearts. They got separated when the Russian Red Army invaded Estonia. I think she said she was 15 and took off on her bike when they were marching into her town. They both ended up in America. He joined the Army and fought in WWII. They connected when he got back. He went to college and was the doctor in our small town for years. She was the pharmacist. Both were amazing people. She past a few years back. I miss talking to them.


Sounds like a mis fire… Spark related… Check spark plugs and coil

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Hello guys, thank you all for your answers, today I received a key for the spark plugs and found a white deposit on the electrode. Is this an indication that the fuel mixture is too weak?

That plug is finished, that’s a sign of running lean. It will result in the backfires and hesitation. Replace plug, double check gap and your problem will be gone. Don’t use a piece of sandpaper, just replace it.

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What he said. Also, make sure plug is correct one, or go one step up to a hotter plug. You can’t really control the fuel flow, so odds are your plug want gapped correctly, was loose or wrong one. Either way, your machine was running hot

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