All the gaskets needed to be replaced on the Briggs 6.75 flathead I was rebuilding. I ported and polished the ports and shaved the eyebrow between the valves and the piston. The gasket set was a perfect fit. It is a monster now. It doesn't sound like a lawnmower engine anymore
Wheel height adjuster lever (spring steel) cracked / split in two.
Tip mower onto side, raising side to be repaired. Empty gas tank if possible or use rags to prevent gasoline drips onto clean surfaces.
Remove wheel using a 1/2" socket. Remove wheel height assembly with 1/2" socket and open end wrench to hold nut below the deck. Position new spring arm over the slot on wheel height assembly plate. Check opposite side to verify correct orientation if needed. Remove plastic cover from old lever using a small flat blade screwdriver. Slip onto new lever. Replace wheel height assembly. Replace wheel.