BOARD 331916 REC331916

Function and Technical Context

This gasket acts as a sealing element at the joints between outboard motor components, preventing fluid or gas leaks between contact surfaces. Depending on its location, it may be part of the cooling system, the exhaust system, or the lower housing area, where a leak would directly compromise engine performance. Proper installation ensures the necessary seal so that internal circuits operate at the correct pressure and temperature, as any leak in these areas can lead to overheating, loss of power, or water ingress into the engine block. This is a wear part whose periodic replacement is essential during any maintenance work on Johnson and Evinrude outboard engines for which it is approved, as well as on Mercury, Mariner, and MerCruiser equipment that share compatible part numbers.

When should this gasket be replaced?

The most common symptoms of a damaged gasket in outboard motors are the presence of moisture or signs of corrosion around the joints, visible coolant leakage, a burning smell from hot exhaust gases, or an abnormal operating temperature detected on the temperature gauge. It is recommended to inspect and replace the gaskets systematically every time the affected area is disassembled for any repair, as well as during seasonal start-up or shutdown maintenance. Preventively replacing this gasket during a scheduled service is the most effective way to avoid a major breakdown due to overheating or internal corrosion while at sea.

Compatible Johnson/Evinrude Engines

Equivalent Manufacturer Part Numbers