Well the 14" inch saw is probably leaking cause of the oiler hose connections which was remedied by a new oiler system. The 24" inch from costco is leaking probably between the oil tank and the cylinder stuffer plate. You'll have to the saw apart and clean the tank and stuffer plate and put a small bead of "YAMABOND #4" sealer around the tank and assemble saw and that should fix your problem.Unless of course you broke the tank by missing the bar adjusting nut and bent the screw and poked it into the tank !!!
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Rick
