Johnson Evinrude Head Cover Gasket 20 Hp 1985-97, 25 Hp 1979-97, 35 Hp 1979-97 WSM 505-16 OEM# 327674 High Performace Quality OEM Style Gaskets. Gaskets and seals meet OEM standards or higher. PWC Engine brings Higher Quality for an awesome price! Complete kits include crankshaft oil seals.