Journeyman Wood Butcher
Join Date: Feb 2008
Location: Central Illinois
OR: forget all that mechanic stuff, turning wrenches, dropping small parts, tearing gaskets, smelling like gasoline for a week....
...and go down to your local hardware store and buy a can of Seafoam. Pour a generous amount (6-8 tablespoons) in the empty gas tank. Start the mower on this Seafoam, let it run until it runs out. Then put in your regular straight gas and add a cap full of Seafoam to each tank. Your carb system will be cleaned, lubed, sealed, and will last several more years.
I use Seafoam on every engine I have except automobiles---two cycle, four cycle, V-twin motorcycle. Everything that sits for a spell sometimes between running---genny, Victory m/c, blower, trimmer, two mowers, snow thrower and chain saw.