Try white vinegar instead of water also
[color:#3333FF][size:14pt]This may be of interest... click[/size][/color] the code is the date backwards but last 2 digits are the factory... 800618 05 is 18/06/80
Type your Model & type (only 4 digits) in the site below. If only 5 digits in the model number add a 0 to the front, ie 092502
[color:#3333FF][size:14pt]Briggs & Stratton[/size][/color] And I use Briggs & Stratton fuel stabilizer, last up to 3yrs