396018 Bypass Cover Assembly – Johnson Evinrude

The 396018 Bypass Cover Assembly replaces the original cover on certain 20-35 HP Johnson and Evinrude outboards from the mid-1980s. 
This aluminium housing channels cooling water around the engine block to maintain proper temperature and performance.
Constructed from marine-grade materials with brass fittings and machined surfaces, it resists corrosion and wear in harsh boating conditions.
Whether your cover has cracked, leaked, or shown signs of corrosion, installing this OEM unit restores efficient cooling and ensures reliable operation season after season.
Featuring exact factory dimensions and a simple bolt-in fit, it makes replacement straightforward.

Key Features:

• Direct OEM replacement for Johnson/Evinrude 20-35 HP models (1985-89)

• Aluminium housing with brass water-flow fittings

• Maintains correct engine cooling by directing flow around the block

• Corrosion-resistant construction for saltwater or freshwater use

• Straightforward installation with factory match fit

Keep your outboard’s cooling system in peak condition with this genuine Johnson Evinrude 396018 Bypass Cover Assembly — engineered for durability, performance, and exact OEM fitment.