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OMC Piston 150 HP - 200 HP

Wiseco forged pistons are superior in strength  due to the inherent nature of both the aluminum alloy and the forging extrusion manufacturing process.
A PRO Piston is made of the highest quality alloys. Pro Pistons are made from high silicon aluminum alloy and meets or exceeds OEM specifications. The Pro pistons are our most economical piston line.
The Pro-V Piston is made of the same alloys as the pro piston adding a gray Moly coating. Moly reduces friction during the critical break-in period and helps dissipate heat as well.
*All pistons are sold with wrist pins, rings, and clips (unless noted).
**All piston kits include one piston only.
Model Cyl. Piston Size Bore Size Wiseco Pro Parts Pro-V cart.gif (2032 bytes)
150HP  78-91

Measures .800 " (.20 MM ) from bottom of wrist pin hole to bottom of piston skirt. 

EARLY Models used an offset wrist pin measuring .660 " (bottom of pin to bottom of piston skirt) and use #3174 pistons 

 

 6 STD 3.500 3173PS  - -

- - 1300V 

- 1300  -

.020 3.520 3173P2  - -

- - 1320V 

- 1320  -

.030 3.530 3173P3  - -

- - 1330V 

- 1330  -

.040 3.540 - -   -
- - 1340V 

- 1340  -

.044 3.544 3173P4  - -

.064 3.564 3173P6  - -

150-175HP 1998-Up Ficht Motor 6 STD Port 3.600 3177PS  - -

- 5000P   

    5000PV 

STD Starboard 3.600 3177SS  - -

- 5000S   

    5000SV 

.020 Port 3.620 3177P2  - -

- 5020P   

.020 Starboard 3.620 3177S2  - -

- 5020S   

.030 Port 3.630 3177P3  - -

- 5030P   

    5030PV 

.030 Starboard 3.630 3177S3  - -

- 5030S   

    5030SV 

.040 Port 3.640 3177P4  - -

.040 Starboard 3.640 3177S4  - -

150HP 91-99, 60 degree Eagle Series

175HP 1991-99, 60 degree Eagle Series

 6 STD Port 3.600 3133PS  - -

- 3300P  -

- - 3300PV 

STD Starboard 3.600 3133SS  - -

- 3300S  -

- - 3300SV 

020 Port 3.620 3133P2  - -

- 3320P  -

- - 3320PV 

020 Starboard 3.620 3133S2  - -

- 3320S  -

- - 3320SV 

030 Port 3.630 3133P3  - -

- 3330P  -

- - 3330PV 

030 Starboard 3.630 3133S3  - -

- 3330S  -

- - 3330SV 

040 Port 3.640 3133P4  - -

040 Starboard 3.640 3133S4  - -

175HP  1986-91 Crossflow 3-5/8" 6 STD 3.625 3121PS  - -

- - 2763STD 

020 3.645 3121P2  - -

- - 2763020 

030 3.655 3121P3  - -

- - 2763030 

040 3.665 3121P4  - -

175HP 1977-83 Crossflow 3-1/2"

185HP 1984-85 Crossflow 3-1/2"

200HP 1979-83 Crossflow 3-1/2"

Measurea .800 " (.20 MM ) from bottom of wrist pin hole to bottom of piston skirt. 

Early models used an offset wrist pin measuring .660 " (bottom of pin to bottom of piston skirt) and use #3174 pistons 

 6 STD 3.500 3173PS  - -

- - 1300V 

- 1300  -

.020 3.520 3173P2  - -

- - 1320V 

- 1320  -

.030 3.530 3173P3  - -

- - 1330V 

- 1330  -

.040 3.540 - -   -
- - 1340V 

- 1340  -

.044 3.544 3173P4  - -

.064 3.564 3173P6  - -

200HP  1985-87 Looper (Small bore) 6 STD Port 3.500 3118PS  -  

- 1800P   

-   1800PV 

STD Starboard 3.500 3118SS  -  

- 1800S   

-   1800SV 

020 Port 3.520 3118P2  -  

- 1820P   

-   1820PV 

020 Starboard 3.520 3118S2  -  

- 1820S   

-   1820SV 

030 Port 3.530 3118P3  -  

- 1830P   

-   1830PV 

030 Starboard 3.530 3118S3  -  

- 1830S   

-   1830SV 

044 Port 3.544 3118P4  -  

044 Starboard 3.544 3118S4  -  

064 Port 3.564 3118P6  -  

064 Starboard 3.564 3118S6  -