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RUBBER VALVE 321221
Description
Function and Technical Context
Valve gasket 321221 is a sealing element that operates in the intake or exhaust system of an outboard motor, ensuring a tight seal between the valve and its seat to prevent gas or liquid leaks that could compromise the assembly’s performance. In Johnson and Evinrude V6 Crossflow engines, this type of part operates under continuous opening and closing cycles, withstanding the pressure and heat generated during engine operation. Its deterioration causes compression losses, irregular idling, and a direct reduction in the power available at the propeller shaft. Keeping this rubber in perfect condition is essential to maintain the efficiency of the combustion cycle and prevent secondary damage to adjacent components. Replacement part compatible with Mercury/Mariner/Mercruiser part numbers 878910 and OMC 0321221 / 321221.
When should this part be replaced?
The most common signs of wear on a valve stem seal include loss of compression in one or more cylinders, difficult starting, high fuel consumption, and the presence of gases in areas where they should not appear—all of which are signs that the seal is no longer effective. It is recommended to inspect the condition of these seals during every seasonal service or whenever the cylinder head is opened, as rubber ages due to heat and operating cycles even if the engine has not accumulated many hours. Replacing this part preventively upon detecting the first signs of failure prevents more serious breakdowns at sea and significantly reduces the total cost of repair.
Compatible Johnson/Evinrude Engines
| Series | Models |
|---|---|
| C155 | C155WTLM 1988, C155WTXM 1988 |
| E150 | E150ANCRS 1984, E150CXCCA 1988, E150CXCEM 1989, E150CXEIE 1991, E150CXESB 1990, E150JLEIE 1991, E150STLCCA 1988, E150STLCDC 1986, E150STLCEM 1989, E150STLCOH 1985, E150STLCOS 1985, E150STLCRD 1984, E150STLCTE 1983, E150STLCUR 1987, E150STLEIE 1991, E150STLESB 1990, E150TLCCA 1988, E150TLCDC 1986, E150TLCEM 1989, E150TLCOS 1985, E150TLCRD 1984, E150TLCUR 1987, E150TLEIE 1991, E150TLESB 1990, E150TRLCIA 1981, E150TRLCIH 1981, E150TRLCNM 1982, E150TRLCSF 1980, E150TRLCSR 1980, E150TRLCTB 1983, E150TRLCTE 1983, E150TRXCIA 1981, E150TRXCIH 1981, E150TRXCNM 1982, E150TRXCSF 1980, E150TRXCSR 1980, E150TRXCTB 1983, E150TRXCTE 1983, E150TXCCA 1988, E150TXCDC 1986, E150TXCEM 1989, E150TXCOS 1985, E150TXCRD 1984, E150TXCUR 1987, E150TXEIE 1991, E150TXESB 1990 |
| E155 | E155WTLCDR 1986, E155WTLCOC 1985, E155WTLCRS 1984, E155WTLCUA 1987, E155WTLEIB 1991, E155WTLENE 1992, E155WTLESM 1990, E155WTLZ 1989, E155WTXCDR 1986, E155WTXCOC 1985, E155WTXCRS 1984, E155WTXCUA 1987, E155WTXEIB 1991, E155WTXENE 1992, E155WTXESM 1990, E155WTXZ 1989 |
| E175 | E175STLCCM 1988, E175STLCEB 1989, E175STLEID 1991, E175STLESE 1990, E175TLCCM 1988, E175TLCDR 1986, E175TLCOC 1985, E175TLCUA 1987, E175TRLCIM 1981, E175TRLCNB 1982, E175TRLCSA 1980, E175TRLCSF 1980, E175TRLCTD 1983, E175TRLCTE 1983, E175TRXCIH 1981, E175TRXCIM 1981, E175TRXCNB 1982, E175TRXCSA 1980, E175TRXCSF 1980, E175TRXCTD 1983, E175TRXCTE 1983, E175TXCCM 1988, E175TXCDR 1986, E175TXCEB 1989, E175TXCOC 1985, E175TXCUA 1987, E175TXEID 1991, E175TXESE 1990 |
| E185 | E185TLCOC 1985, E185TLCRS 1984, E185TXCOC 1985, E185TXCRS 1984 |
| E200 | E200TRLCIB 1981, E200TRLCIH 1981, E200TRLCNE 1982, E200TRLCSF 1980, E200TRLCSM 1980, E200TRLCTD 1983, E200TRLCTS 1983, E200TRXCIB 1981, E200TRXCIH 1981, E200TRXCNE 1982, E200TRXCSF 1980, E200TRXCSM 1980, E200TRXCTD 1983, E200TRXCTS 1983 |
| E235 | E235STLCOR 1985, E235STLCRC 1984, E235STLCTS 1983, E235TLCOR 1985, E235TLCRC 1984, E235TRLCIB 1981, E235TRLCIH 1981, E235TRLCNE 1982, E235TRLCSM 1980, E235TRLCTD 1983, E235TRLCTS 1983, E235TRXCIB 1981, E235TRXCIH 1981, E235TRXCNE 1982, E235TRXCSM 1980, E235TRXCTD 1983, E235TRXCTS 1983, E235TXCOR 1985, E235TXCRC 1984 |
| J150 | J150CXCCA 1988, J150CXCEM 1989, J150CXEIE 1991, J150CXESB 1990, J150GTLCUR 1987, J150JLEIE 1991, J150STLACA 1988, J150STLCCA 1988, J150STLCDC 1986, J150STLCEM 1989, J150STLCOH 1985, J150STLCOS 1985, J150STLCRD 1984, J150STLCTE 1983, J150STLCUR 1987, J150STLEIE 1991, J150STLESB 1990, J150TLAEM 1989, J150TLAIE 1991, J150TLASB 1990, J150TLCCA 1988, J150TLCDC 1986, J150TLCEM 1989, J150TLCIA 1981, J150TLCIH 1981, J150TLCNM 1982, J150TLCOS 1985, J150TLCRD 1984, J150TLCSF 1980, J150TLCSR 1980, J150TLCTB 1983, J150TLCTE 1983, J150TLCUR 1987, J150TLEIE 1991, J150TLESB 1990, J150TXCCA 1988, J150TXCDC 1986, J150TXCEM 1989, J150TXCIA 1981, J150TXCIH 1981, J150TXCNM 1982, J150TXCOS 1985, J150TXCRD 1984, J150TXCSF 1980, J150TXCSR 1980, J150TXCTB 1983, J150TXCTE 1983, J150TXCUR 1987, J150TXEIE 1991, J150TXESB 1990 |
| J155 | J155WTLCDR 1986, J155WTLCOC 1985, J155WTLCRS 1984, J155WTLCUA 1987, J155WTLEIB 1991, J155WTLENE 1992, J155WTLESM 1990, J155WTLZ 1989, J155WTXCDR 1986, J155WTXCOC 1985, J155WTXCRS 1984, J155WTXCUA 1987, J155WTXEIB 1991, J155WTXENE 1992, J155WTXESM 1990, J155WTXZ 1989 |
| J175 | J175STLACM 1988, J175STLCCM 1988, J175STLCEB 1989, J175STLEID 1991, J175STLESE 1990, J175TLCCM 1988, J175TLCDR 1986, J175TLCIH 1981, J175TLCIM 1981, J175TLCNB 1982, J175TLCOC 1985, J175TLCSA 1980, J175TLCSF 1980, J175TLCTD 1983, J175TLCTE 1983, J175TLCUA 1987, J175TXCCM 1988, J175TXCDR 1986, J175TXCEB 1989, J175TXCIH 1981, J175TXCIM 1981, J175TXCNB 1982, J175TXCOC 1985, J175TXCSA 1980, J175TXCSF 1980, J175TXCTD 1983, J175TXCTE 1983, J175TXCUA 1987, J175TXEID 1991, J175TXESE 1990 |
| J185 | J185TLCOC 1985, J185TLCRS 1984, J185TXCOC 1985, J185TXCR 1984 |
| J200 | J200TLCIH 1981, J200TLCNE 1982, J200TLCSF 1980, J200TLCSM 1980, J200TLCTD 1983, J200TLCTS 1983, J200TXCIB 1981, J200TXCIH 1981, J200TXCNE 1982, J200TXCSF 1980, J200TXCSM 1980, J200TXCTD 1983, J200TXCTS 1983 |
| J235 | J235STLCOR 1985, J235STLCRC 1984, J235STLCTS 1983, J235TLCIB 1981, J235TLCIH 1981, J235TLCNE 1982, J235TLCOR 1985, J235TLCRC 1984, J235TLCSM 1980, J235TLCTD 1983, J235TLCTS 1983, J235TXCIB 1981, J235TXCIH 1981, J235TXCNE 1982, J235TXCOR 1985, J235TXCRC 1984, J235TXCSM 1980, J235TXCTD 1983, J235TXCTS 1983 |
| Otros | 150840S 1978, 150849S 1978, 150940C 1979, 150949C 1979, 150TL78S 1978, 150TL79C 1979, 150TXL78S 1978, 150TXL79C 1979, 175740S 1977, 175749S 1977, 175840C 1978, 175840S 1978, 175940R 1979, 175949R 1979, 175TL77S 1977, 175TL78C 1978, 175TL79R 1979, 175TX78C 1978, 175TXL77S 1977, 175TXL79R 1979, 200490A 1979, 200640S 1976, 200649S 1976, 200740C 1977, 200749C 1977, 200840R 1978, 200849R 1978, 200940A 1979, 200949A 1979, 200TL76S 1976, 200TL77C 1977, 200TL78R 1978, 200TL79A 1979, 200TX78R 1978, 200TXL76S 1976, 200TXL77C 1977, 200TXL79A 1979, 235840R 1978, 235849R 1978, 235940A 1979, 235949A 1979, 235TL70A 1979, 235TL78R 1978, 235TX78R 1978, 235TXL79A 1979 |
| TE150 | TE150SLCEM 1989, TE150SLEIE 1991, TE150SLESB 1990, TE150TXCEM 1989 |
| TJ150 | TJ150SLCEM 1989, TJ150SLEIE 1991, TJ150SLESB 1990, TJ150TXCEM 1989 |
| VE150 | VE150SLEIE 1991, VE150SLESB 1990, VE150TLEIE 1991, VE150TLESB 1990, VE150TXEIE 1991, VE150TXESB 1990 |
| VE175 | VE175SLEID 1991, VE175SLESE 1990, VE175TXEID 1991, VE175TXESE 1990 |
| VJ150 | VJ150SLEIE 1991, VJ150SLESB 1990, VJ150TLEIE 1991, VJ150TLESB 1990, VJ150TXEIE 1991, VJ150TXESB 1990 |
| VJ175 | VJ175SLEID 1991, VJ175SLESE 1990, VJ175TXEID 1991, VJ175TXESE 1990 |
| X155 | X155WTLM 1988, X155WTXM 1988 |
Equivalent Manufacturer Part Numbers
| Manufacturer/Brand | Reference/Part Number |
|---|---|
| Mercury/Mariner/Mercruiser | 878910 |
| OMC | 0321221, 321221 |
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