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Older bs 3.5 hp 20 in cut walk be hind mower hunts and or surges while running started between refilling tank is it poor gass wrong gas useing 87 octane new oil wtf is happaning

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Bad gas can do it but a sniff can tell. If it smells like turpentine, it's bad. Your may also have a plugged syphon tube (inside the tank).

Posted on Apr 28, 2010

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Posted on Jan 02, 2017

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