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Have a Briggs 21hp model 33m777 engine will turn over without plug but when install plus will not spin fast enough to start drags

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I am assuming the engine is in a lawn tractor with battery and key start? Have you checked your battery to see if it is fully charged and has the required cranking amps? Have you tried another battery or tried to jump start from a battery booster box?

Posted on May 16, 2017


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