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briggs & stratton 125cc engine backfires?

5 Answers

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  • fuzzy
    Lv 6
    9 months ago

    may also be faulty valves

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  • 9 months ago

    Probably lean. Or intake leak--spray WD 40 around inlets, see if idle changes.

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  • Anonymous
    9 months ago

    False air is entering the engine and causing a misfire. Check carb intake seals.

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  • 9 months ago

    During excelleration or deexcell?

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  • Anonymous
    9 months ago

    Mixture is too weak. Dismantle the carb carefully and clean it with aerosol carb cleaner. make sure the jet is clear. Use fuse wire the clear it. You can also buy carb refurb kits cheaply on the net.

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