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INTERNAL ENGINE COMPONENTS
Pistons/Piston Rings
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
18-3929
18-3930
4
170 (4cyl.)
6916779 - & Up
18-4109
18-4118
18-4134
18-3928
18-3929
18-3930
6
175/4.3L (262 CID)
B527955 - & Up
18-4173
18-4188
18-4164
18-3937
18-3939
18-3938
6
180/3.7LX (4cyl.)
6916779 - & Up
18-4109
18-4118
18-4134
PIST-ONS
18 3928
18-3929
18-3930
4
4.3L Generation II
D714107 - & Up
18-4173
18-4188
18-4164
18-3937
18-3939
18-3938
6
185 (229 CID)
6330183 - & Up
-
-
-
18-3944
-
-
6
185 (262 CID)
A331455 - & Up
-
-
18-4164
18-3937
18-3939
18-3938
6
190 GM
1564539 - 1730903
18-4180
18-4183
18-4166
18-3942
-
-
6
190 (4cyl.)
6916779 - & Up
18-4109
18-4118
18-4134
18-3928
18-3929
18-3930
4
200 GM
6218462 - & Up
-
-
-
18-3944
-
-
8
200/5.0L (GM)
B525982 - & Up
18-4179
-
18-4178
18-3944
-
-
8
205 (262 CID)
A331455 - & Up
-
-
18-4164
18-3937
18-3939
18-3938
6
205/4.3LX (262 CID)
B527955 - & Up
18-4173
18-4188
18-4164
18-3937
18-3939
18-3938
6
4.3LX Generation II
D714370 - & Up
18-4173
18-4188
18-4164
18-3937
18-3939
18-3938
6
215 Ford
2781153 - & Up
-
-
-
18-3937
18-3939
18-3938
8
225 Ford
3385721 - & Up
-
-
-
18-3937
18-3939
18-3938
8
225 GM
1536920 - & Up
-
-
N.L.A.
18-3937
18-3939
18-3938
8
228 GM
4765100 - & Up
-
-
-
18-3944
-
-
8
230 GM
6218462 - & Up
-
-
-
18-3944
-
-
8
230 GM (IB)
5907058 - & Up
-
-
-
18-3944
-
-
8
230/5.0L GM (IB)
B522506 - & Up
18-4179
18-4530
18-4178
18-3944
-
-
8
230/5.0-LX (GM)
B525982 - & Up
18-4179
-
18-4178
18-3944
-
-
8
250 GM
2314301 - 2639854
-
N.L.A.
N.L.A.
18-3937
18-3939
18-3938
8
250 GM
4768000 - 4908849
18-4173
18-4188
18-4164
18-3937
18-3939
18-3938
8
255 GM
4175500 - 4498700
18-4173
18-4188
18-4164
18-3937
18-3939
18-3938
8
260 GM
4908850 - 6218461
18-4173
18-4188
18-4164
18-3937
18-3939
18-3938
8
260/5.7L (GM)
B525982 - & Up
18-4173
18-4188
18-4164
18-3937
18-3939
18-3938
8
260-GM ((IB))
5907058 - & Up
18-4173
18-4188
18-4164
18-3937
18-3939
18-3938
8
270 GM
2851074 - 3077735
N.L.A.
N.L.A.
N.L.A.
18-3937
18-3939
18-3938
8
300 MR/TRS (GM)
6668677 - & Up
-
-
-
18-3937
18-3939
18-3938
8
320 GM (EFI)
A543605 - & Up
-
-
-
18-3937
18-3939
18-3938
8
320 GM (EFI) Bravo
B157603 - & Up
-
-
-
18-3937
18-3939
18-3938
8
325 GM
2278747 - & Up
N.L.A.
-
N.L.A.
18-3940
18-3950
18-3941
8
330 GM
4623115 - & Up
18-4171
18-4189
18-4172
18-3940
18-3950
18-3941
8
330 GM/W.B.W.
6083145 - & Up
18-4171
18-4189
18-4172
18-3940
18-3950
18-3941
8
340/7.4L-GM (IB)
5889914 - & Up
18-4171
18-4189
18-4172
18-3940
18-3950
18-3941
8