Questions for the Poulan gurus. I bought a couple of 3500's last summer. One was a good solid machine starts great and runs strong. The other one I bought as a parts machine as the fuel tank was split wide open and it had been sitting for quite some time. My original plan was to use the parts machine to keep the good one going. But it has so much compression I have decided to put a fuel tank, carb kit, fuel lines, filter etc into it and get here going. According to parts tree IPL the 336 is supposed to use the same fuel tank. Part number 530069925. I bought a 336 tank on Ebay a while back and now have finally gotten some time to put her in and get this baby going. But I have found a difference in the two tanks and wanted your opinions. The original 3500 tank has an additional nub below the upper a/v mount witch the 336 tank does not. This nub fits loosely into the main housing and must act as a stop for the upper a/v. Is this difference because of the spring versus rubber upper a/v. If I use the rubber a/v will I be ok or should I look for a tank with the nub.
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