Cylinder Head Gasket 6G8-11181 For 4-Stroke F 8 9.9 FT9.9 T9.9 Outboard 6G8-11181-A0 6G8-11181-A1 6G8-11181-00 18-3827 Replacement cylinder head gasket designed for use with specified outboard motor models.Matches specifications for proper fit and function.Compatible with engines requiring part numbers 6G8-11181, 6G8-11181-A0, 6G8-11181-A1, 6G8-11181-00, and 18-3827.Installs between the cylinder head and engine block to seal the combustion chamber and prevent leakage of gases and fluids.Constructed to withstand operational temperatures and pressures typical in 4-stroke outboard engines.