Pistons

MERCURY PISTONS
Model	Cyl	Piston Size	Bore Size	Wiseco
20 HP 1972-79	2	STD	2.565	3144PS
		.020	2.585	3144P2
		.030	2.595	3144P3
		.040	2.605	3144P4
25 HP 1984-86	2	STD	2.835	586PS
30 HP 1984-86		.020	2.854	586P2
Mariner only		.040	2.874	586P4
		.060	2.894	586P6
Check Bore Size		.080	3.913	586P8
35 HP 1984-89	2	STD	2.875	3109PS
40 HP 1972-83		.015	2.890	-
Crossflow		.020	2.895	3009P2
		.030	2.905	3009P3
		.040	2.915	3009P4
40 HP 1979-90	2	STD	2.955	-
Mariner only		.020		-
40 HP 1990-97	4	STD	2.565	3044PS
45 HP 1986-89	4	.020	2.585	3044P2
50 HP 1970-85	4	.030	2.595	3044P3
Classic Inline 4		.040	2.605	3044P4
50 HP 1984-90	3	STD	2.875	3023PS
		.015	2.890	-
		.020	2.895	3123P2
		.030	2.905	3123P3
		.040	2.915	3123P4
50 HP 1991-97	3	STD	2.955	3147PS
		.020	2.975	3147P2
		.030	2.985	3147P3
		.040	2.995	3147P4
60 HP 1984-90	3	STD	2.875	3123PS
Crossflow		.015	2.890	-
Low Dome		.020	2.895	3123P2
		.030	2.905	3123P3
		.040	2.915	3123P4
60 HP 1991-97	3	STD	2.955	3147PS
		.020	2.975	3147P2
		.030	2.985	3147P3
		.040	2.995	3147P4
65 HP 1973-76	3	STD	2.875	3123PS
70 HP 1977-83	3	.015	2.890	-
Crossflow		.020	2.895	3123P2
Low Dome		.030	2.905	3123P3
		.040	2.915	3123P4
70 HP 1987-89	3	STD	3.375	312OPS
Loop Charge		.010	3.385	3120P1
		.015	3.390	-
		.020	3.395	3120P2
		.030	3.405	3120P3
		.040	3.415	3120P4

 

60 HP 1984-90	3	STD	2.875	3109PS
65 HP 1973-76	3	.015	2.890
70 HP 1977-83	3	.020	2.895	3109P2
75 HP 1984-86	4	.030	2.905	3109P3
Crossflow		.040	2.915	3109P4
75 HP 1990-91	3	STD	3.375	312OPS
Loop Charge		.010	3.385	3120P1
		.015	3.390	-
		.020	3.395	3120P2
		.030	3.405	3120P3
		.040	3.415	3120P4
75 HP 1992-93	3	STD	3.375	3142PS
(Top Guided rod)		.010	3.385	3142P1
		.015	3.390	-
Loop Charge		.020	3.395	3142P2
		.030	3.405	3142P3
75 HP 1994-98	3	STD	3.500	3162PS
Loop Charge		.020	3.520	3162P2
		.030	3.530	3162P3
		.044	3.544	3162P4
80 HP 1978-83	4	STD	2.875	3109PS
Crossflow		.015	2.890	-
		.020	2.895	3109P2
		.030	2.905	3109P3
		.040	2.915	3109P4
80 HP 1987-89	3	STD	3.375	312OPS
Loop Charge		.010	3.385	3120P1
		.015	3.390	-
		.020	3.395	3120P2
		.030	3.405	3120P3
		.040	3.415	3120P4
85 HP 1973-77	4	STD	2.875	3109PS
90 HP 1978-87	6	.015	2.890	-
Crossflow		.020	2.895	3109P2
		.030	2.905	3109P3
		.040	2.915	3109P4
90 HP 1987-91	3	STD	3.375	312OPS
Loop Charge		.010	3.385	3120P1
		.015	3.390	-
		.020	3.395	3120P2
		.030	3.405	3120P3
		.040	3.415	3120P4
90 HP 1992-93	3	STD	3.375	3142PS.
(Top Guided rod)		.010	3.385	3142P1
Loop Charge		.015	3.390	-
		.020	3.395	3142P2
		.030	3.405	3142P3

90 HP 1994-99	3	STD	3.500	3162PS
Loop Charge		.020	3.520	3162P2
		.030	3.530	3162P3
		.044	3.544	3162P4
100 HP 1989-91	4	STD	3.375	312OPS
Loop Charge		.010	3.385	3120P1
		.015	3.390	-
		.020	3.395	3120P2
		.030	3.405	3120P3
		.040	3.415	3120P4
100 HP 1992-93	4	STD	3.375	3142PS
(Top Guided)		.010	3.385	3142P1
		.015	3.390	-
Loop Charge		.020	3.395	3142P2
		.030	3.405	3142P3
100 HP 1994-99	4	STD	3.500	3162PS
Loop Charge		.020	3.520	3162P2
		.030	3.530	3162P3
		.044	3.544	3162P4
115 HP 1970-83	6	STD	2.875	3109PS
		.015	2.890	-
		.020	2.895	3109P2
		.030	2.905	3109P3
		.040	2.915	3109P4
115 HP 1984-88	6	STD	2.875	3123PS
Cross Flow		.015	2.890	-
Low Dome		.020	2.895	3123P2
		.030	2.905	3123P3
		.040	2.915	3123P4
115 HP 1989-91	4	STD	3.375	312OPS
Loop Charge		.010	3.385	3120P1
		.015	3.390	-
		.020	3.395	3120P2
		.030	3.405	3120P3
		.040	3.415	3120P4
115 HP 1992-93	4	STD	3.375	3142PS
(Top Guided)		.010	3.385	3142P1
		.015	3.390	-
Loop Charge		.020	3.395	3142P2
		.030	3.405	3142P3
115 HP 1994-99	4	STD	3.500	3162PS
125 HP 1994-99		.020	3.520	3162P2
Loop Charge		.030	3.530	3162P3
		.044	3.544	3162P4

135 HP 1970-71	6	STD	2.875	3109PS
Cross Flow		.015	2.890	-
		.020	2.895	3109P2
		.030	2.905	3109P3
		.040	2.915	3109P4
1355 HP 1981-91	V-6	STD Port	3.125	3108PS
2 Liter		STD Star	3.125	3108SS
		.015 Port	3.140	-
		.015 Star	3.140	-
		.020 Port	3.145	3108P2
		.020 Star	3.145	3108S2
		.030 Port	3.155	3108P3
		.030 Star	3.155	3108S3
		.040 Port	3.165	3108P4
		.040 Star	3.165	3108S4
		.060 Port	3.185	3108P6
		.060 Star	3.185	3108S6
135 HP 1992-99	V-6	STD Port	3.125	314OPS
2 Liter		STD Star	3.125	314OSS
		.015 Port	3.140	-
		.015 Star	3.140	-
with Boost Port		.020 Port	3.145	3140P2
(Top Guided)		.020 Star	3.145	3140S2
		.030 Port	3.155	314OP3
		.030 Star	3.155	3140S3
		.040 Port	3.165	3140P4
		.040 Star	3.165	3140S4
140 HP 1972	6	STD	2.875	3109PS
Inline 6		.015	2.890	-
Cross Flow		.020	2.895	3109P2
		.030	2.905	3109P3
		.040	2.915	3109P4
140 HP 1972	6	STD	2.875	3123PS
Inline 6	6	.015	2.890	-
Cross Flow		.020	2.895	3123P2
Low Dome		.030	2.905	3123P3
		.040	2.915	3123P4
150 HP 1979-91	V-6	STD Port	3.125	3108PS
2 Liter		STD Star	3.125	3108SS
		.015 Port	3.140	-
		.015 Star	3.140	-
		.020 Port	3.145	3108P2
		.020 Star	3.145	310852
		.030 Port	3.155	3108P3
		.030 Star	3.155	310853
		.040 Port	3.165	3108P4
		.040 Star	3.165	310854
		.060 Port	3.185	3108P6
		.060 Star	3.185	3108S6

150 HP 1992-99	V-6	STD Port	3.125	314OPS
2 Liter		STD Star	3.125	314OSS
		.015 Port	3.140	-
		.015 Star	3.140	-
(Top Guided)		.020 Port	3.145	3140132
		.020 Star	3.145	314052
		.030 Port	3.155	3040133
		.030 Star	3.155	304053
		.040 Port	3.165	3040134
		.040 Star	3.165	304054
150 HP 1991	V-6	STD Port	3.500	3124PS
2.5 Liter, XR6		STD Star	3.500	3124SS
Loop Charge		.015 Port	3.515	-
		.015 Star	3.515	-
		.020 Port	3.520	3124P2
		.020 Star	3.520	3124S2
		.030 Port	3.530	3124P3
		.030 Star	3.530	3124S3
		.044 Port	3.544	3124P4
		.044 Star	3.544	3124S4
150 HP 1992-97	V-6	STD Port	3.500	3137PS
2.5 Liter, XR6		STD Star	3.500	3137SS
150 HP 1993-99	V-6	.015 Port	3.515	-
2.5 Liter, XR1		.015 Star	3.515	-
EFI		.020 Port	3.520	3137P2
Sport Jet		.020 Star	3.520	3137S2
175XR2	V-6	.030 Port	3.530	3137P3
97-99		.030 Star	3.530	3137S3
(Top Guided)		.044 Port	3.544	3137P4
		.044 Star	3.544	3137S4
175 HP 1976-81	V-6	STD Port	3.125	3108PS
2 Liter		STD Star	3.125	3108SS
Loop Charge		.015 Port	3.140	-
		.015 Star	3.140	-
		.020 Port	3.145	3108P2
		.020 Star	3.145	3108S2
		.030 Port	3.155	3108P3
		.030 Star	3.155	3108S3
		.040 Port	3.165	3108P4
		.040 Star	3.165	3108S4
		.060Port	3.185	3108P6
		.060Star	3.185	3108S6

175 HP 1985-91	V-6	STD Port	3.375	3102PS
2.4 Liter		STD Star	3.375	3102SS
Loop Charge		.010 Port	3.385	3102P1
		.010 Star	3.385	3102S1
(XR4)		.015 Port	3.390	-
		.015 Star	3.390	-
Specify rings		.020 Port	3.395	3102P2
for sleeved hole.		.020 Star	3.395	3102S2
		.030 Port	3.405	3102P3
		.030 Star	3.405	3102S3
175 HP 1992-99	V-6	STD Port	3.500	3137PS
2.5 Liter		STD Star	3.500	3137SS
(Top Guided Rod)		.015 Port	3.515	-
175 HP 1992-99	V-6	.015 Star	3.515	-
2.5 Liter XRI		.020 Port	3.520	3137P2
(Top Guided Rod)		.020 Star	3.520	3137S2
		.030 Port	3.530	3137P3
		.030 Star	3.530	3137S3
		.044 Port	3.544	3137P4
		.044 Star	3.544	3137S4
200 HP 1978-90	V-6	STD Port	3.375	3102PS
2.4 Liter		STD Star	3.375	3102SS
Loop Charge		.010 Port	3.385	3102P1
		.010 Star	3.385	3102S1
		.015 Port	3.390	-
		.015 Star	3.390	-
		.020 Port	3.395	3102P2
		.020 Star	3.395	3102S2
		.030 Port	3.405	3102P3
		.030 Star	3.405	3102S3
200 HP 1991	V-6	STD Port	3.500	3124PS
2.5 Liter		STD Star	3.500	3124SS
200 HP 1991		.015 Port	3.515	-
Offshore		.015 Star	3.515	-
2.5 Liter		.020 Port	3.520	3124P2
		.020 Star	3.520	3124S2
		.030 Port	3.530	3124P3
		.030 Star	3.530	312453
		.044 Port	3.544	3124P4
		.044 Star	3.544	3124S4
200 HP 1992-99	V-6	STD Port	3.500	3137PS
2.5 Liter		STD Star	3.500	3137SS
200 HP 1992-99		.015 Port	3.515	-
Offshore		.015 Star	3.515	-
2.5 Liter		.020 Port	3.520	3137P2
		.020 Star	3.520	3137S2
(Top Guided)		.030 Port	3.530	3137P3
		.030 Star	3.530	3137S3
		.044 Port	3.544	3137P4
		.044 Star	3.544	3137S4

200 HP 1983-90	V-6	STD Port	3.375	3102PS
(2.4 Liter)		STD Star	3.375	3102SS
Loop Charge		.010 Port	3.385	3102P1
		.010 Star	3.385	3102S1
(Comes with		.015 Port	3.390	-
rings for a chrome		.015 Star	3.390	-
hole. Request		.020 Port	3.395	3102P2
rings for a chrome		.020 Star	3.395	3102S2
sleeved hole.)		.030 Port	3.405	3102P3
		.030 Star	3.405	3102S3
200 HP 1991	V-6	STD Port	3.500	3124PS
(2.5 Liter)		STD Star	3.500	3124SS
200 HP 1991		.015 Port	3.515	-
(2.5 Liter) XRI		.015 Star	3.515	-
200 HP 1991		.020 Port	3.520	3124P2
(2.5 Liter) EFI		.020 Star	3.520	3124S2
		.030 Port	3.530	3124P3
Loop Charge		.030 Star	3.530	3124S3
		.044 Port	3.544	3124P4
		.044 Star	3.544	3124S4
200 HP 1992-99	V-6	STD Port	3.500	3137PS
(2.5 Liter)		STD Star	3.500	3137SS
200 HP 92-98		.. 015 Port	3.515</