The flange pieces that connect the pump to the inlet and outflow pipes are sealed with water pump gaskets. When two or more mating surfaces are together, a gasket is a mechanical seal that fills the space between them to prevent leaking from or into the joined objects.
Fresh Water Cooling Gasket Manifold for Mercruiser
27-8637251 Mercruiser Wet Joint Block Off Exhaust Riser Gasket Replacement
On the engine of the Mercruiser:
- GM V6 4.3L, GM V8 small block, wet joint exhaust manifold, and risers
- block 5.0L, 5.7L, and 6.2L, and GM V8 big block 7.4L and 8.2L CLOSED COOLED engines.
- REC 27-8637251 is a non-OEM part.
Key Features:
- For usage with manifolds that are cooled by freshwater, use a block off gasket.
- Stainless steel block off plate for the Barr Mercruiser
- In freshwater cooling applications for Mercruiser center rise exhaust manifolds
- Risers for the Mercruiser 98502A2, 98504A3, and 44354A3
- Replacing the MC20-87918 Barr
- 27-8637251 is a Mercury replacement.
- USE WITH TWO GASKETS
Specifications:
- SKU: REC27-8637251
- Weight: 0.04 LBS
This product replaces:
- 27-8637251, 860231, 863725, 8637251 / 0502988, 0508715
