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INTERNAL ENGINE COMPONENTS
Pistons/Piston Rings
ALL PISTONS
ARE SUPPLIED COMPLETE WITH PISTON RINGS AND WRIST PIN.
PISTONS
REPLACES
STD
MERCRUISER
OMC / VOLVO
CRUSADER
18-4180
736-2343
--
--
18-4161
733-3819
3853340
--
733-803850T
914816
18-4109
778-9441A3
--
--
759-80661A7
18-4169
734-4858
--
--
18-4173
735-6370
*14077948
7080330
18-4173
735-9686
3911020
--
18-4173
735-808674
--
--
735-850097
RINGS
18-4181
735-6538
364702
--
18-4179
735-9716,T1
--
33706
REPLACES
STD
MERCRUISER
OMC / VOLVO
CRUSADER
18-4176
749-4058
--
--
18-3928
39-74381A1
--
.020
18-3937
39-17464
*14089025
12370
18-4183
--
--
--
18-3937
--
328506
--
18-4160
733-3818
3853477, 915236
--
18-3937
--
3853960
--
18-4118
--
--
--
18-3937
--
914555
--
18-4188
--
N/A
--
18-3937
--
3853268
--
18-4177
749-4060
--
--
18-3937
--
985083, 986336
--
18-4189
--
--
--
18-3940
39-67127
328536
30184
.030
18-3942
39-67132
18-3944
39-75609
370409
33302
18-4166
733-2279
--
--
.020
18-4191
--
--
--
18-3939
39-66217
3854252
--
18-4134
778-9441A5
--
--
18-3939
--
914556
--
759-80661A8
18-3950
--
N/A
--
18-4164
735-6371
*14077949
7080350
.030
735-9687
3911023
--
18-3938
39-17465
*14089026
--
735-850098
18-3938
--
328516
--
18-4178
735-9715
--
33708
18-3938
--
914557
--
18-3938
--
--
12372
➀ Piston & Pin only
* OMC References GM number
18-3941
39-67128
328541
30185
PISTON/ RING APPLICATION
MERCRUISER
PISTONS
RINGS
Qty.
Per
Model
Serial Number
Std.
.020
.030
Std.
.020
.030
Eng.
120/2.5L
1666601& Up
18-4180
18-4183
18-4166
18-3942
-
-
4
140
2508261-3332137
18-4161
18-4160
18-4191
18-3937
18-3939
18-3938
4
140
3332138 - 5157668
18-4161
18-4160
18-4191
18-3937
18-3939
18-3938
4
140
5157669 - 6229717
18-4161
18-4160
18-4191
18-3937
18-3939
18-3938
4
140/3.0L
6229718 - C856558
18-4161
18-4160
18-4191
18-3937
18-3939
18-3938
4
3.0L/3.0LX
C856559 & Up
-
-
-
18-3937
18-3939
18-3938
6
150
1666495 - 2048046
18-4180
18-4183
18-4166
18-3942
-
-
6
160 (6cyl.)
2048022 - 2770031
N.L.A.
-
N.L.A.
18-3942
-
-
6
165 (6cyl.)
2770032 - & Up
-
-
-
18-3942
-
-
6
165/3.7L
6916779 - & Up
18-4109
18-4118
18-4134
18-3928
-
-
4
PISTONS
170 (4cyl.)
6916779 - & Up
18-4109
18-4118
18-4134
18-3928
-
-
6
175/4.3L (262 CID)
B527955 - & Up
18-4173
18-4188
18-4164
18-3937
18-3939
18-3938
6
N.L.A. No longer available from O.E. source
549