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)
Wrist Pins
Circlips
(included but not sold separately)
Model / HP
Cyl.
Bore size
Piston
OEM Part #
Piston Ring
OEM Part #
9.9 / 15
2
std
18-4135
761-7982M, 761-7982T
18-3976
39-15230M
n.s.s
n.s.s
9.9 / 15
2
.25 mm OS
18-4136
761-8022M, 761-8022T
18-3977
39-18939M
n.s.s
n.s.s
9.9 / 15
2
.50 mm OS
18-4137
761-8023M, 761-8023T
18-3978
39-15322M
n.s.s
n.s.s
48
2
std
18-4138
761-8484M
--
--
n.s.s
n.s.s
48
2
.25 mm OS
18-4139
761-8485M, 761-8485T
--
--
n.s.s
n.s.s
48
2
.50 mm OS
18-4140
761-8486M, 761-8486T
--
--
n.s.s
n.s.s
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
39-18939M, 39-18939T
18-3978
39-15322M
18-3976
39-15320M
18-3986
39-81096M
18-3987
39-81097M, 39-81097T
18-3985
39-81095M,
39-81095T
18-3989
39-81261M
18-3990
39-81262M
18-3988
39-81260M
18-3992
39-83196M
18-3993
39-83197M
18-3991
39-83195M,
39-83195T
18-3995
39-92626M, 39-92626T
18-3996
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 18-4139
18-4140 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
318