Gas lines deteriorated(has 2). Which line goes where? One line has "free flow" big screen type filter. The other line has a small porus "brass" type filter that sticks completely into end of line. The carb has 2 fittings, one on the feft side of carb, the other is on top of carb. Which line goes where on carb? Saw ran good until gas line split at fitting, when I cleaned air filter. But when I "fished" lines out of tank, they broke off due to brittle old age thus leaving me scratching my head on which line and filter connects to which port on Carb. Any help will be appreciated. Thanks.