STIHL 064 MS640 Crankcase Gasket

The Gasket Genius crankcase gasket fits Stihl 064 and MS640 chainsaws, replacing part number 1122 029 0500. The crankcase gasket seals the joint between the two crankcase halves, which is critical for maintaining correct crankcase pressure in a two-stroke engine. A degraded or damaged gasket allows unmetered air to enter at the joint, upsetting the fuel mixture, weakening compression and causing symptoms such as unstable idling, poor throttle response and hard starting. Replacing it with a correctly fitting gasket restores the seal and brings the engine back to reliable working order.

This is a direct replacement part that maintains proper crankcase integrity and consistent engine performance during use.

Fits specified Stihl models:

• Stihl 064
• Stihl MS640

Replaces part number:

• 1122 029 0500