Hi all. Looking for advice on cleaning out an old Lawn Boy 10515 gas tank that is full of residue\particulates. I detached the tank and disassembled the shut off valve. Was hoping to see a screen or filter but nothing. Attempted to wash out the tank by sloshing clean gas in it but the tank design makes it difficult to drain the particulates out of the screw on cap and the drainage hole to the fuel line is too small for some of the residue to flush out. Noticed a seem around the tank and cowling. Is it possible to pry the tank apart on the seem in 2 halves? Any advice on cleaning out the tank on this particular model? Any help is greatly appreciated. Thanks.