Description
SIERRA Open Dry-Joint Exhaust Riser Gasket – 18-0721
The SIERRA 18-0721 is the open or full-flow version of the dry-joint exhaust riser gasket used on applicable MerCruiser GM V6 and V8 engines. It is intended for standard/raw-water cooling arrangements where coolant flow through the manifold-to-riser joint is required.
- Open / full-flow dry-joint riser gasket
- For standard/full-flow cooling arrangements
- Fits dry-joint GM V6 and V8 MerCruiser exhaust systems
- Commonly used on 2002-and-newer 4.3L, 5.0L, 5.7L and 6.2L engines
- Must be selected according to cooling-system plumbing; not interchangeable in function with the closed/block-off gasket
Confirm the engine or drive model and serial number against the listed OEM interchange before ordering; closely related marine engines can use different gaskets or seals across production changes.
Specifications:
- Product type: dry-joint riser gasket
- Flow configuration: open / full-flow
- Cooling system: standard / full-flow
- Engine families: 4.3L, 5.0L, 5.7L, 6.2L GM V6/V8 dry-joint systems
Interchange / Cross-Reference:
- MerCruiser 27-864547A02
- MerCruiser 27-864547A
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