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MERCURY/MARINER
Internal Engine System
ALL PISTONS
ARE SUPPLIED COMPLETE WITH PISTON RINGS, WRIST PIN AND CIRCLIPS.
Mariner (Japanese Models)
Sierra Piston Kit Contents (See Application Charts for Specific Applications)
Model / HP
Cyl.
Bore size
Piston
OEM Part #
Piston Ring
OEM Part #
18-4135
18-3976
9.9 / 15
2
std
761-7982M, 761-7982T
39-15320M
18-4136
18-3977
9.9 / 15
2
.25 mm OS
761-8022M, 761-8022T
39-18939M
18-4137
18-3978
9.9 / 15
2
.50 mm OS
761-8023M, 761-8023T
39-15322M
18-4138
48
2
std
761-8484M
--
--
MARINER PISTON RINGS -- JAPANESE MODELS
STANDARD
.25mm O.S.
.50mm O.S.
Part #
O.E. #
Part #
O.E. #
Part #
O.E. #
18-3954
39-14253M, 39-14235T
18-3977
18-3978
39-18939M, 39-18939T
39-15322M
18-3976
39-15320M
18-3986
18-3987
39-81096M
39-81097M, 39-81097T
18-3985
39-81095M, 39-81095T
18-3989
18-3990
39-81261M
39-81262M
18-3988
39-81260M
18-3992
18-3993
39-83196M
39-83197M
18-3991
39-83195M, 39-83195T
18-3995
18-3996
39-92626M, 39-92626T
39-92627M, 39-92627T
18-3994
39-92625M, 39-92625T
MARINER PISTON AND RINGS APPLICATION -- JAPANESE MODELS
Ser #
Standard
.25mm
.50mm
Standard
.25mm
.50mm
Qty.
Model
Code
Ser #
Piston
Piston
Piston
Rings
Rings
Rings
Req'd
9.9
682
ALL
18-4135 18-4136 18-4137 18-3976 18-3977 18-3978
2
15C
684
ALL
18-4135 18-4136 18-4137 18-3976 18-3977 18-3978
2
20C,25A
6A9
ALL
--
--
--
18-3985 18-3986 18-3987
2
25C
695
ALL
--
--
--
18-3985 18-3986 18-3987
2
28
664
ALL
--
--
--
18-3985 18-3986 18-3987
2
30A
689
ALL
18-4138
--
--
18-3954
--
--
2
48
670
S-02440 & Below / L33131 & Below
--
--
--
18-3988 18-3989 18-3990
2
55 M, ML
663
ALL
--
--
--
18-3988 18-3989 18-3990
2
48
670
S-02441 & Up / L-33132 & Up
--
--
--
18-3991 18-3992 18-3993
2
W48
670
M 002731 & Up / ML 314101 & Up
--
--
--
18-3991 18-3992 18-3993
2
60
675
E 00101-001170 / EL 30101-304180
--
--
--
18-3991 18-3992 18-3993
2
W48
670
M 002730 & Below / ML 314100 & Below
--
--
--
18-3994 18-3995 18-3996
2
319