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In Reply to: Sears Yard tractor engine problem posted by Tom Morgan on Saturday, June 13, 2009:
If smoke white-blue white from exhaust/muffler area,you may have a crankcase breather valve sticking when eng gets hot,allowing oil to be blown into carb & eng burning same,remove air cleaner,see if there is any oil in filter or around inside frame of filter assembly,also check that valve cover(s) not leaking dripping oil on muffler,if smoke black you may have a float in carb that's sticking, flooding eng or dirt in float needle seat,preventing float needle from seating,flooding eng.Other possibility,fuel pump leaking(if eng has)allowing gas to get into crankcase,diluiting & raiseing oil level & excess oil/gas mixture being blown into carb from crankcase breather valve
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