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Cylinder Head Gasket 330818
Description
Function and Technical Context
The cylinder head gasket acts as a watertight seal between the engine block and the cylinder head, preventing combustion gases, coolant, and oil from mixing or escaping externally. It operates within the structural sealing system of the outboard engine, withstanding thermal cycles and pressures generated in the combustion chamber during each ignition. Its integrity is fundamental to maintaining correct compression in each cylinder and ensuring that the cooling and lubrication circuits remain sealed. If this gasket fails, the engine may lose power progressively, consume coolant without visible external leakage, or in severe cases, mix water with the crankcase oil, causing severe damage to internal components. Reference 330818 is compatible with Johnson and Evinrude engines from the E40, E50, E55, E60, and E65 series, as well as with certain Mercury/Mariner/MerCruiser applications under reference 802031 and with OMC references 0330818 and 0772578.
When to Replace This Part?
The most common symptoms of a worn cylinder head gasket are: white or blue smoke from the exhaust even with the engine at operating temperature, loss of compression detected through cylinder testing, presence of bubbles in the coolant reservoir, or milky-looking oil on the dipstick. It is recommended to inspect the cylinder head gasket whenever the cylinder head is removed for any reason, as a used gasket should not be reused even if it appears visually sound. Replacing it preventively during a major overhaul avoids breakdowns while underway that can leave the engine out of service in open water and significantly increase subsequent repair costs.
Compatible Johnson/Evinrude Engines
| Series | Models |
|---|---|
| E10 | E10ECCD 1988, E10ECDB 1986, E10ECES 1989, E10ECOM 1985, E10ECUE 1987, E10EEIR 1991, E10EENA 1992, E10EESC 1990, E10ELCCD 1988, E10ELCDB 1986, E10ELCES 1989, E10ELCOM 1985, E10ELCUE 1987, E10ELEIR 1991, E10ELENA 1992, E10ELESC 1990, E10RCCD 1988, E10RCDB 1986, E10RCES 1989, E10RCOM 1985, E10RCUE 1987, E10REIR 1991, E10RELEIR 1991, E10RELENA 1992, E10RELESC 1990, E10RENA 1992, E10RESC 1990, E10RLCCD 1988, E10RLCDB 1986, E10RLCES 1989, E10RLCOM 1985, E10RLCUE 1987, E10RLEIR 1991, E10RLENA 1992, E10RLESC 1990, E10SELCCD 1988, E10SELCDB 1986, E10SELCES 1989, E10SELCOM 1985, E10SELCUE 1987, E10SELEIR 1991, E10SELENA 1992, E10SELESC 1990 |
| E15 | E15ECCS 1988, E15ECDE 1986, E15ECEC 1989, E15ECOB 1985, E15ECUD 1987, E15EEIA 1991, E15EENM 1992, E15EESR 1990, E15ELCCS 1988, E15ELCDE 1986, E15ELCEC 1989, E15ELCOB 1985, E15ELCUD 1987, E15ELEIA 1991, E15ELENM 1992, E15ELESR 1990, E15RCCS 1988, E15RCDE 1986, E15RCEC 1989, E15RCOB 1985, E15RCUD 1987, E15REIA 1991, E15RELEIA 1991, E15RELENM 1992, E15RELESR 1990, E15RENM 1992, E15RESR 1990, E15RLCCS 1988, E15RLCDE 1986, E15RLCEC 1989, E15RLCOB 1985, E15RLCUD 1987, E15RLEIA 1991, E15RLENM 1992, E15RLESR 1990 |
| E40 | E40DRGLAGA, E40DRGLAGB, E40DRGLAGC, E40DRGLAGD, E40DRGLAGG, E40DRLAAA, E40DRLABA, E40DRLAFA, E40DRLAFB, E40DRLAGA, E40DRLIIS, E40DRLINC, E40DRLISD, E40DRLISF, E40DRLSCB, E40DRLSDA, E40DRLSEE, E40DRLSOR, E40DRLSRC, E40DRLSUM, E40DRMLABA, E40DRMLAGA, E40DRMLAGB, E40DRMLAGC, E40DRMLAGD |
| E50 | E50DRMLAFA |
| E55 | E55MJRLAAA, E55MJRLABA, E55MJRLABB, E55MJRLABF, E55MJRLAFA, E55MJRLAFB, E55MJRLAFC, E55MJRLAFD, E55MJRLAFF, E55MJRLAFG, E55MJRLIIM, E55MJRLINB, E55MJRLISA, E55MJRLSCC, E55MJRLSEF, E55MJRLSER, E55MRLAAA, E55MRLABA, E55MRLABB, E55MRLABF, E55MRLAFA, E55MRLAFB, E55MRLAFC, E55MRLAFD, E55MRLAFF, E55MRLAFG, E55MRLIIM, E55MRLINB, E55MRLISA, E55MRLSCC, E55MRLSEF, E55MRLSER |
| E60 | E60WDRLSOS, E60WDRYSOS |
| E65 | E65WDRLIIA, E65WDRLINM, E65WDRLISF, E65WDRLISR, E65WDRLSCS, E65WDRLSEC, E65WDRYIIA, E65WDRYINM, E65WDRYISF, E65WDRYISR, E65WDRYSCS, E65WDRYSEC |
| J10 | J10ECCD 1988, J10ECDB 1986, J10ECES 1989, J10ECOM 1985, J10ECUE 1987, J10EEIR 1991, J10EENA 1992, J10EESC 1990, J10ELCCD 1988, J10ELCDB 1986, J10ELCES 1989, J10ELCOM 1985, J10ELCUE 1987, J10ELEIR 1991, J10ELENA 1992, J10ELESC 1990, J10RCCD 1988, J10RCDB 1986, J10RCES 1989, J10RCOM 1985, J10RCUE 1987, J10REIR 1991, J10RELEIR 1991, J10RELENA 1992, J10RELESC 1990, J10RENA 1992, J10RESC 1990, J10RLCCD 1988, J10RLCDB 1986, J10RLCES 1989, J10RLCOM 1985, J10RLCUE 1987, J10RLEIR 1991, J10RLENA 1992, J10RLESC 1990, J10SELCCD 1988, J10SELCDB 1986, J10SELCES 1989, J10SELCOM 1985, J10SELCUE 1987, J10SELEIR 1991, J10SELENA 1992, J10SELESC 1990 |
| J15 | J15ECCS 1988, J15ECDE 1986, J15ECEC 1989, J15ECOB 1985, J15ECUD 1987, J15EEIA 1991, J15EENM 1992, J15EESR 1990, J15ELCCS 1988, J15ELCDE 1986, J15ELCEC 1989, J15ELCOB 1985, J15ELCUD 1987, J15ELEIA 1991, J15ELENM 1992, J15ELESR 1990, J15RCCS 1988, J15RCDE 1986, J15RCEC 1989, J15RCOB 1985, J15RCUD 1987, J15REIA 1991, J15RELEIA 1991, J15RELENM 1992, J15RELESR 1990, J15RENM 1992, J15RESR 1990, J15RLCCS 1988, J15RLCDE 1986, J15RLCEC 1989, J15RLCOB 1985, J15RLCUD 1987, J15RLEIA 1991, J15RLENM 1992, J15RLESR 1990 |
| TE10 | TE10ELCES 1989, TE10ELESC 1990, TE10RELEIR 1991, TE10RELENA 1992, TE10RELESC 1990, TE10RLCES 1989, TE10RLESC 1990 |
| TE15 | TE15RLCEC 1989 |
| TJ10 | TJ10ELCES 1989, TJ10ELESC 1990, TJ10RELEIR 1991, TJ10RELENA 1992, TJ10RELESC 1990, TJ10RLCES 1989, TJ10RLESC 1990 |
| TJ15 | TJ15RLCEC 1989 |
| VE14 | VE14RCCS 1988, VE14RCEC 1989 |
| VJ14 | VJ14RCCS 1988, VJ14RCEC 1989 |
Equivalent Manufacturer References
| Manufacturer/Brand | Reference/Part Number |
|---|---|
| Mercury/Mariner/Mercruiser | 802031 |
| OMC | 0330818, 0772578, 330818 ✓ (actual) |
Related Johnson/Evinrude Spare Parts
If you are maintaining or repairing your Johnson/Evinrude engine, these spare parts might also interest you:
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