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Cylinder head gasket for Mercury Mariner 18XD, 20XD, 25XD and 60 hp 2-cylinder engines, and Yamaha 55B, E48C and E55C Enduro. It seals the cylinder head to the engine block to contain combustion pressure and prevent coolant leaks into the cylinders.
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CYLINDER HEAD GASKET 27-81254M
REC663-11193-00
€7.30
Tax included
Cylinder head gasket for Mercury Mariner 18XD, 20XD, 25XD and 60 hp 2-cylinder engines, and Yamaha 55B, E48C and E55C Enduro. It seals the cylinder head to the engine block to contain combustion pressure and prevent coolant leaks into the cylinders.
Description
Function and technical context
The head gasket is a critical sealing component located between the cylinder head and the engine block, responsible for ensuring the tightness of the combustion chamber and cooling passages. This sealing is essential to contain the pressure of the combustion gases and prevent coolant from escaping into the cylinder area, which would cause loss of performance, engine overheating and contamination of the lubricating oil. Its structural integrity is critical to maintaining the reliability of the two-cylinder system in mid-horsepower Mercury Mariner engines.
When to replace this part?
Head gaskets can develop leaks after thousands of hours of operation, especially if the engine has been operated under high thermal pressure or without regular maintenance of the cooling system. Typical symptoms include loss of coolant without visible leaks in the hoses, white smoke in the exhaust, progressive loss of power and abnormal overheating of the propeller. It is recommended to inspect its condition during each seasonal inspection and replace it preventively if any sign of degradation is detected, since a compromised gasket can quickly evolve into a complete breakdown in navigation.
Engine Compatibility
Mercury/MerCruiser
| Marca | Modelo | Rango de serie |
|---|---|---|
| Mercury Mariner | 18XD | 6443973 THRU 0B238463 / 7209533 THRU 0A730006 / 9378151 THRU 9507380 |
| Mercury Mariner | 20XD (2 CYL.) | 6443973 THRU 0B238463 / 7209533 THRU 0A730006 / 9415101 THRU 9507380 |
| Mercury Mariner | 25XD | 6443973 THRU 0B238463 / 7209533 THRU 0A730006 / 9415101 THRU 9507380 |
| Mercury Mariner | 60 (2 CYL.) | EL-675-30101 THRU EL-675-304180 / E-675-00101 THRU E-675-001170 |
Motores Yamaha Compatibles▾
| Modelo | Años |
|---|---|
| 55B | 1990 – 2002 |
| E48C | 2003 |
| E55C Enduro | 2003 – 2016 |
Equivalent manufacturer part numbers
| Manufacturer/Brand | Reference/Part Number |
|---|---|
| Mercury Mariner | 00, 27-81254M, 81254M |
| Yamaha | 663-11193-A0, 663-11193-A0-00, 663111930000, 66311193A0, 66311193A000 |
Product Details
REC663-11193-00