MERCURY/MARINER
Internal Engine System
MARINER PISTON AND RINGS APPLICATION -- JAPANESE MODELS (Cont.)
Ser #
Standard
.25mm
.50mm
Standard
.25mm
.50mm
Qty.
Model
Code
Ser #
Piston
Piston
Piston
Rings
Rings
Rings
Req'd
W48
670
M 007191 & UP / ML 334241 & UP
--
--
--
18-3994
18-3995
18-3996
2
55
663
E 004041 & UP / EL 315379 & UP
--
--
--
18-3994
18-3995
18-3996
2
W55
663
ML 578278 Up
--
--
--
18-3994
18-3995
18-3996
2
60 2 CYL
675
E 001171 Up / EL 304181 & Up
--
--
--
18-3994
18-3995
18-3996
2
Mercury / Mariner
Sierra Piston Kit Contents (See Application Charts for Specific Applications)
Model / HP
Cyl.
Bore size
Piston
OEM Part #
Piston Ring
OEM Part #
Wrist Pin
Circlips
OEM Part #
2 Ring Pistons - High Dome
35-140
2-6 2.875 / Std.
18-4505
774-9137A12
18-3918
39-817096A6
N.S.S.
18-4294
40-52035
35-140
2-6 2.890 / .015
18-4520
774-9137A13
18-3919
39-817096A16
N.S.S.
18-4294
40-52035
35-140
2-6 2.905 / .030
18-4535
774-9137A14
18-3920
39-817096A26
N.S.S.
18-4294
40-52035
2 Ring Pistons - Low Dome
35-140
2-6 2.875 / Std.
18-4500
774-9137A9
18-3918
39-817096A6
N.S.S.
18-4294
40-52035
35-140
2-6 2.890 / .015
18-4515
774-9137A10
18-3919
39-817096A16
N.S.S.
18-4294
40-52035
35-140
2-6 2.905 / .030
18-4530
774-9137A11
18-3920
39-817096A26
N.S.S.
18-4294
40-52035
3 Ring Pistons - High Dome
35-140
2-6 2.875 / Std.
➀18-4505 776-8896A3
➀18-3902
39-78816A12
N.S.S.
18-4294
40-52035
35-140
2-6 2.890 / .015
18-4152 776-8897A2
18-3916
39-78811A12
N.S.S.
18-4294
40-52035
35-140
2-6 2.905 / .030
➀18-4535 776-8898A2
➀18-3917
39-88392A12
N.S.S.
18-4294
40-52035
Model / HP
Cyl.
Bore size
Piston
OEM Part #
Piston Ring
OEM Part #
Wrist Pin
Circlips
OEM Part #
3 Ring Pistons - Low Dome
➁18-4500
➁18-3902
35-140
2-6
2.875 / Std.
776-8600A9
39-78816A12
N.S.S.
18-4294
40-52035
➁18-4530
➁18-3916
35-140
2-6
2.890 / .015
776-9095A1
39-78811A12
N.S.S.
18-4294
40-52035
35-140
2-6
2.905 / .030
18-4156
776-9096A1
18-3917
39-88392A12
N.S.S.
18-4294
40-52035
2 Ring Pistons - Crossflow
40-50
4
2.565
/ Std.
18-4620
780-9229A7
18-3966
39-18653A12
N.S.S.
18-4294
40-52035
40-50
4
2.580
/ .015
18-4621
780-9229A10
18-3967
39-18653A1
N.S.S.
18-4294
40-52035
40-50
4
2.595
/ .030
18-4622
780-9229A11
18-3968
39-18653A2
N.S.S.
18-4294
40-52035
50-60
3
2.875
/ Std.
18-4016
783-9613A1
18-4019
39-19721A6
N.S.S.
18-4294
40-52035
50-60
3
2.890
/ .015
18-4017
783-9613A2
18-4020
39-19721A1
N.S.S.
18-4294
40-52035
50-60
3
2.905
/ .030
18-4018
783-9613A3
18-4021
39-19721A2
N.S.S.
18-4294
40-52035
70-115
3-4
3.375
/ Std.
18-4623
777-815965T4
18-3979
39-96170A12
N.S.S.
18-4294
40-52035
70-115
3-4
3.390
/ .015
18-4624
777-815965A5
18-3980
39-96170A3
N.S.S.
18-4294
40-52035
70-115
3-4
3.405
/ .030
18-4625
777-815965A6
18-3981
39-96170A4
N.S.S.
18-4294
40-52035
75-125
3-4
3.375
/ Std.
18-4626
2704-826191T4
18-3982
39-822321A12
N.S.S.
18-4294
40-52035
75-125
3-4
3.390
/ .015
18-4627
2704-821896A3
18-3983
39-822321A1
N.S.S.
18-4294
40-52035
75-125
3-4
3.405
/ .030
18-4628
2704-821896A4
18-3984
39-822321A2
N.S.S.
18-4294
40-52035
3 RING INLINE PISTON AND RINGS APPLICATION
Beginning
Ending
Std. Cyl.
Std.
.015 O.S.
.030 O.S.
Std.
.015 O.S.
.030 O.S. Qty.
H.P.
Serial No.
Serial No.
Dia. (Bore)
Piston
Piston
Piston
Rings
Rings
Rings
Req'd
35
6445653
& UP
2.875
--
18-4520
--
18-3902
18-3916
18-3917
2
40 (4 cyl.)
1280685
1476509
2.562
--
--
--
18-3903
--
--
4
40
2045260
C159199
2.875
--
18-4520
--
18-3902
18-3916
18-3917
2
40 (4 cyl.)
C159200
& UP
2.562
--
--
--
18-3903
--
--
4
45
1476510
& UP
2.562
--
--
--
18-3903
--
--
4
50 (4 cyl.)
1421113
6428680
2.562
--
--
--
18-3903
--
--
4
50
6428681
0G590000
2.875
--
--
18-4130
18-3902
18-3916
18-3917
3
60
1303411
1542744
2.562
--
--
--
18-3903
--
--
6
60
6428681
& UP
2.875
--
18-4520
--
18-3902
18-3916
18-3917
3
65
3293154
4571651
2.875
--
18-4520
--
18-3902
18-3916
18-3917
3
70
1296411
1566239
2.875
--
--
--
18-3903
--
--
6
70
4571652
6428680
2.875
--
18-4520
--
18-3902
18-3916
18-3917
3
75
6432901
A996141
2.875
--
18-4520
--
18-3902
18-3916
18-3917
4
80
2559001
3493912
2.875
--
18-4520
--
18-3902
18-3916
18-3917
4
80
4831999
6432900
2.875
--
18-4520
--
18-3902
18-3916
18-3917
4
85 Merc.
3493913
4831998
2.875
--
18-4520
--
18-3902
18-3916
18-3917
4
85 Mar.
4731898
4842728
2.875
--
18-4520
--
18-3902
18-3916
18-3917
4
90
4845301
A996141
2.875
--
18-4520
--
18-3902
18-3916
18-3917
6
95
1962187
2318585
2.875
--