Wet-Joint Exhaust Manifold Gasket Repair Kit for MerCruiser Model 140
Wet-Joint Exhaust Manifold Gasket Repair Kit for MerCruiser Model 140 is backordered and will ship as soon as it is back in stock.
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Wet-Joint Exhaust Manifold Gasket Repair Kit for MerCruiser Model 140
Wet-Joint Exhaust Manifold Gasket Repair Kit for MerCruiser Model 140 is backordered and will ship as soon as it is back in stock.
SERDAMARINE / MARINE EXHAUST PARTS
Wet-Joint Exhaust Manifold Gasket Repair Kit for MerCruiser Model 140
This aftermarket wet-joint exhaust manifold gasket repair kit services MerCruiser Model 140 sterndrive installations equipped with the GM 181 CID inline-four (4-cylinder) engine from 1968–1982. It bundles the manifold-to-cylinder head gasket (referenced to 27-53354), open and closed-cooling manifold-to-elbow gaskets, a Rochester carburetor mounting gasket, and a drain plug with O-ring for manifold service.
Configuration & Specifications
| Exhaust Joint Design | Wet-joint exhaust configuration |
|---|---|
| Manifold-to-Elbow Gasket Options | Includes both open gasket (referenced to 27-99777-2 / 27-99777Q02) and closed-cooling gasket (referenced to 27-92720) |
| Carburetor Mounting Interface | Rochester carburetor mounting gasket (referenced to 27-64692) |
Engine Applications
Designed for the MerCruiser sterndrive application listed below. Before purchase, confirm the Model 140 identification, 1968–1982 model year, GM 181 CID inline-four layout, and wet-joint exhaust arrangement, and select the manifold-to-elbow gasket that matches your installed open or closed-cooling setup rather than choosing by engine displacement alone.
- MerCruiser Stern / Out Drive Model 140 — GM 181 CID, Inline-4 (4-Cylinder), Model Years 1968–1982. Requires wet-joint exhaust manifold configuration. At the manifold-to-elbow joint, match the open gasket (27-99777-2 / 27-99777Q02) or closed-cooling gasket (27-92720) to the installed cooling arrangement. Fits when specified
Reference Numbers
The numbers below are provided for component identification and cross-reference only; they do not indicate that this aftermarket kit is manufactured by the OEM brands, and individual gasket or drain-plug numbers represent service components rather than a single OEM part number for the complete kit.
| Primary Component OEM References (Mercury / MerCruiser) |
Exhaust manifold to cylinder head gasket: 27-53354 Open manifold-to-elbow exhaust gasket: 27-99777Q02, 27-99777, 27-99777-2 Closed-cooling manifold-to-elbow gasket: 27-92720 Rochester carburetor mounting gasket: 27-64692 Drain plug service reference: 8M0119211 |
|---|---|
| Additional Mercury Mariner / MerCruiser Component References | 27-32910, 27-52076, 27-997771, 27-997772, 27-99777B2, 32910, 52076, 53354, 64692, 802377, 806608, 806608A1, 806608A02, 806608Q01, 92720, 997771, 99777B2, 99777Q02 |
| OMC Component References | 0315055, 0508561, 0508563, 0508579, 0508615, 0777923, 0778121, 0908079, 315055, 508561, 508563, 508579, 777923, 908079 |
| Sierra Component References | 18-0954, 18-2833, 18-2912 |
| GLM Component References | 31520, 31570, 32630 |
| Mallory Component References | 9-61415, 9-61417 |
| Other Aftermarket Component References | 18-0356, 18-0937, 47-315055 |
Additional service references
These identify individual components or related service parts; they do not describe additional supplied items.
- Mercury Mariner; Mercruiser Stern / Out Drive — 8M0103971
- Mercury Mariner — 22806608Q01
- Sierra — 18-4226
- OBR Red Rhino — MR-511
- Mallory — 9-41203
- GLM — 13992
- Mercruiser Stern / Out Drive — 22-8M0119211
- RECMAR — REC27-99777Q02
- RECMAR — REC27-64692
- RECMAR — REC27-53354
- Mercruiser Stern / Out Drive — 25-26802
- GLM — 81110
- Mercruiser Stern / Out Drive — 96705A1
- GLM — 51212
Supplied Parts
- Exhaust manifold to cylinder head gasket (referenced to 27-53354)
- Open manifold-to-elbow exhaust gasket (referenced to 27-99777 / 27-99777-2 / 27-99777Q02)
- Closed-cooling manifold-to-elbow exhaust gasket (referenced to 27-92720)
- Rochester carburetor mounting gasket (referenced to 27-64692)
- Drain plug with O-ring (referenced to 8M0119211)
Service & Installation Notes
General service guidance only. Use the service manual for your exact engine and exhaust configuration.
- Shut off the engine, allow all exhaust components to cool completely, and disconnect the battery to prevent accidental starting during service.
- Drain the exhaust manifold before unbolting joints, and support heavy manifold or elbow castings during removal so mating flanges and studs are not damaged.
- Clean and inspect the cylinder head, manifold, elbow, and carburetor mounting surfaces to ensure they are flat and free of old gasket material or corrosion.
- At the manifold-to-elbow interface, install only the gasket that matches your engine's cooling configuration—use the open gasket (referenced to 27-99777-2 / 27-99777Q02) or the closed-cooling gasket (referenced to 27-92720) as specified by the OEM manual. Do not substitute flow configurations.
- Fit the O-ring onto the drain plug and tighten all fasteners to the sequences and specifications in the MerCruiser service manual. After reassembly, run the engine with proper cooling water supply and inspect all gasket joints and the drain plug for water or exhaust leaks; stop the engine immediately if any abnormality occurs.
Questions Before Replacement
How do I choose between the two manifold-to-elbow gaskets included in this kit?
This kit includes both styles for the 1968–1982 MerCruiser Model 140 (GM 181 CID inline-4) wet-joint manifold. Compare the removed gasket and your cooling arrangement: the open version corresponds to reference 27-99777-2 / 27-99777Q02, while the closed-cooling version corresponds to reference 27-92720.
Do the listed OEM part numbers represent the entire gasket kit?
No. Numbers such as 27-53354, 27-99777Q02, 27-92720, 27-64692, and 8M0119211 identify the individual gaskets and the drain plug included inside this service bundle, not a single OEM number for the complete kit.
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