27-73866 Exhaust Manifold Gasket Set (2 Pcs) for Ford 302/351 V8
27-73866 Exhaust Manifold Gasket Set (2 Pcs) for Ford 302/351 V8 is backordered and will ship as soon as it is back in stock.
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27-73866 Exhaust Manifold Gasket Set (2 Pcs) for Ford 302/351 V8
27-73866 Exhaust Manifold Gasket Set (2 Pcs) for Ford 302/351 V8 is backordered and will ship as soon as it is back in stock.
SERDAMARINE / MARINE EXHAUST PARTS
Exhaust Manifold Gasket Set (2 Pieces) for Ford 302 and 351 CID V8 Marine Applications
This two-piece aftermarket exhaust manifold gasket set services the exhaust manifold joint on specified Ford 5.0 L (302 CID) and 5.8 L (351 CID) V8 engines used in MerCruiser, Volvo Penta (1993 onward), and OMC (1991 onward) marine configurations.
Cross-referenced with MerCruiser 27-73866 and Volvo Penta 3852455, this set contains the manifold gaskets only and is not a complete exhaust manifold assembly.
Engine Applications
Applies to the following MerCruiser, Volvo Penta, and OMC marine engines built on Ford 302 CID (5.0 L) and 351 CID (5.8 L) V8 blocks. Because 5.0 L and 5.8 L displacements also exist across different engine families, verify that your engine is the listed Ford V8 configuration and meets the specific model and year criteria before ordering.
- MerCruiser 215 / 225 / 225MIE / 888 — 5.0 L (302 CID) Ford V8. Fits as listed
- MerCruiser 233 / 233MIE / 255 / 255MIE — 5.8 L (351 CID) Ford V8. Fits as listed
- OMC 5.0 / 5.8 / 351 EFI — 302 / 351 CID Ford V8; model years 1991 onward. Fits when specified (confirm 1991-onward year range and 5.0, 5.8, or 351 EFI model designation)
Reference Numbers
These part numbers serve as identification references for part selection and do not independently establish direct interchangeability or original equipment manufacturer status. Retain complete reference numbers, including leading zeros and suffixes, when matching your existing gasket.
| MerCruiser | 27-73866, 27-54566, 73866, 54566 |
|---|---|
| Volvo Penta | 3852455, 3853742, 0908717, 0916262 |
| OMC | 3852455, 3853742, 908717, 916262, 0908717, 0916262 |
| Pleasurecraft (PCM / Crusader) | RM0007 |
| Mallory | 9-61420 |
| Sierra | 18-0183, 18-0183-1 |
| GLM | 33790 |
Reference Note: Do not assume Sierra 18-0183 and 18-0183-1 represent the exact same version or packaging; verify the suffix against your specific service requirements.
Supplied Parts
- Exhaust manifold gasket — 2 pieces
Service & Installation Notes
General service guidance only. Use the service manual for your exact engine and exhaust configuration.
- Ensure the engine is completely cool and disconnect the battery to prevent accidental starting before loosening any exhaust components.
- Support the weight of the exhaust manifold during removal and installation so the castings do not hang on mounting bolts or damage the cylinder head sealing surfaces.
- Remove all old gasket material and clean the mating surfaces on both the cylinder head and exhaust manifold, taking care not to gouge or score the metal.
- Compare the port layout and bolt hole pattern of the new gaskets directly against the engine cylinder head and exhaust manifold before assembly.
- Follow your engine manufacturer's service manual for fastener tightening sequence, torque specifications, and post-installation exhaust leak inspection. If any exhaust leak or abnormal temperature occurs during operation, shut down the engine immediately and inspect the joint.
The Serdamarine Approach
Exhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.
Questions Before Replacement
Does this gasket set fit all 5.0 L and 5.8 L marine V8 engines?
No. Displacement alone does not identify the gasket. This set is specifically for Ford 302 CID (5.0 L) and 351 CID (5.8 L) V8 blocks used in the listed MerCruiser models (215, 225, 225MIE, 888, 233, 233MIE, 255, 255MIE), Volvo Penta 5.0/5.8 L and Fi/FSi models from 1993 onward, and OMC 5.0, 5.8, and 351 EFI models from 1991 onward.
How many gaskets are included in this set?
This set includes 2 exhaust manifold gaskets. It does not include exhaust manifolds, elbows, end caps, or mounting hardware.
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