OMC Evinrude Johnson Core Plug
OMC Evinrude Johnson Core Plug — Part #303405
Genuine OEM core plug (also known as a welch plug or dish plug) for Evinrude and Johnson outboard motors. Seals coolant and water passages within the engine block to prevent leaks and protect against freeze damage.
- Part Number: 303405
- Function: Seals coolant and water passages in the engine block
- Cupped/dish design expands to seal when driven into place
- Protects against freeze damage in marine engines
- Compatible with select Evinrude and Johnson outboards — verify fitment before ordering