Reinstall the exhaust manifold
you should replace the oil filter during every scheduled oil change
if you use fuel from questionable sources or notice performance issues
whichever occurs first
Install the new gasket or O-ring on the pump cover
Water Pump Impeller – Fits Johnson/Evinrude OMC 40 HP (Replaces 390286, 0390286, 777835, 0777835) 100HP Reinstall the exhaust manifoldProduct Details This is a direct replacement Water Pump Impeller for Johnson Evinrude OMC 40 HP 2 stroke outboard engines. It is designed to fit models manufactured between 19741976, 19811987, and specifically a range of models from 19831986, ensuring reliable cooling performance. This part serves as a direct interchange for OEM numbers 390286, 0390286, 777835, and 0777835, and aftermarket references including Sierra 18 3366, CEF 500353, Mallory 9