70981A3 Wet-Joint Manifold Exhaust Repair Kit for MerCruiser 120 140
70981A3 Wet-Joint Manifold Exhaust Repair Kit for MerCruiser 120 140 is backordered and will ship as soon as it is back in stock.
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70981A3 Wet-Joint Manifold Exhaust Repair Kit for MerCruiser 120 140
70981A3 Wet-Joint Manifold Exhaust Repair Kit for MerCruiser 120 140 is backordered and will ship as soon as it is back in stock.
SERDAMARINE / MARINE EXHAUST PARTS
Wet-Joint Manifold Exhaust Repair Kit for MerCruiser 120 and 140 — Old Style Option, 1982–1995
This aftermarket manifold exhaust repair kit services MerCruiser Model 120 and 140 inline 4-cylinder sterndrive installations (153 and 181 CID) from 1982 through 1995 equipped with the old-style wet-joint exhaust arrangement. It combines component service references including exhaust bellow reference 70981A3 (for two-piece exhaust elbow setups) and carburetor base gasket reference 27-64692 (associated with Rochester carburetors).
Configuration & Specifications
| Exhaust Joint Configuration | Wet-Joint (Old Style Option) |
|---|---|
| Exhaust Elbow Arrangement (Ref. 70981A3) | Two-piece exhaust elbow (distinct from one-piece elbow arrangements that use a different 4-inch bellow) |
| Carburetor Base Gasket Application (Ref. 27-64692) | Associated with Rochester carburetors (MerCarb carburetors use a separate gasket reference) |
Engine Applications
This kit is configured for the MerCruiser inline 4-cylinder sterndrive applications listed below. Before ordering, confirm that the engine falls within the 1982–1995 range with the old-style wet-joint exhaust arrangement, uses a two-piece exhaust elbow for bellow reference 70981A3, and uses a Rochester carburetor if matching base gasket reference 27-64692.
- MerCruiser Stern Drive Model 120 / 140 — Inline 4, 4-Cylinder, 153 / 181 CID; Years: 1982–1995; Configuration: Wet Joint, Old Style Option; Requires two-piece exhaust elbow for exhaust bellow reference 70981A3 and Rochester carburetor for base gasket reference 27-64692. Fits when specified
Reference Numbers
The numbers below are provided as identification references for the individual components associated with this kit; they are not complete-kit replacement numbers and do not by themselves guarantee interchangeability or indicate manufacturer identity.
| Primary Component Reference Set (MerCruiser Stern / Out Drive) | 70981A3 + 32-90949 + 27-96429 + 27-99777 + 27-64692 + 27807982 |
|---|---|
| MerCruiser Stern / Out Drive Component References | 70981A3, 32-90949, 27-96429, 27-99777, 27-99777-2, 27-64692, 27807982, 27-807982-1 |
| Mercury Mariner Component References | 70981, 32-90949T, 27-99777-2, 27-997771, 27-997772, 27-52076, 27-32910, 27-807982-1 |
| Sierra Aftermarket Component References | 18-2761, 18-2762, 18-1204-1, 18-1204-1-9, 18-2833, 18-2833-9, 18-0356 |
| GLM Aftermarket Component References | 89070, 89090, 33570, 31520, 31660, 32180 |
Supplied Parts
- Manifold exhaust repair kit
Service & Installation Notes
General service guidance only. Use the service manual for your exact engine and exhaust configuration.
- Ensure the engine is completely shut down and cool, and disconnect the starting circuit to prevent accidental cranking before servicing exhaust connections.
- Support heavy exhaust manifold and elbow components during disassembly and reassembly, and clean all mating flange and gasket surfaces without gouging the metal.
- Match each bellow, hose, and gasket against the removed parts and your engine's specific elbow and carburetor configuration prior to final assembly.
- After completing installation according to factory service procedures, inspect all exhaust and cooling joints during initial operation; shut down immediately and inspect if any leakage or abnormal temperature occurs.
Questions Before Replacement
How do I know if exhaust bellow reference 70981A3 fits my exhaust elbow setup?
Exhaust bellow reference 70981A3 is used on old-style wet-joint installations equipped with a two-piece exhaust elbow. The catalog distinguishes this setup from one-piece exhaust elbow arrangements, which use a different 4-inch bellow.
Which carburetor type matches base gasket reference 27-64692?
Carburetor base gasket reference 27-64692 is associated with Rochester carburetors on these MerCruiser 120 and 140 applications. Engines equipped with a MerCarb carburetor use a separate base gasket reference.
Are the listed OEM and aftermarket numbers complete-kit part numbers?
No. The listed OEM, Sierra, and GLM numbers are individual component references for the hoses, bellows, and gaskets combined in this repair kit rather than single complete-kit replacement numbers.
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