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  Mercury Outboard 135HP-150HP Pistons

 

******Top guided or (bottom guided)?******

It's easy to tell by looking at the forging number on the rod. Then check the chart below.

Model top guided bottom guided
3 & 4 Cyl. 646-81884 638-85321
V-6 644-818141 636-8118
  

Avoid damaging your flywheel and crankshaft

Flywheel Puller

 

Mercury Outboard Motor Pistons 135HP-150HP

Wiseco forged pistons are superior in strength due to the inherent nature of both the aluminum alloy and the forging extrusion manufacturing process.
The Pro Parts piston is a (cast piston), cast from high silicone aluminum according to original equipment specifications. Most mechanics use a cast piston when available.
The Pro-V piston is a (cast piston), cast from high silicone aluminum according to original equipment specifications. Most mechanics use a cast piston when available.
The Pro- HP has high quality moly coating on the skirt and comes with a ceramic coated dome. Available wherever PRO - V cast pistons are applicable by special order. Call 941-209-5747for details.

*All pistons are sold with wrist pins, rings, and clips (unless noted).

**All pistons & kits include one piston only.

Model Cyl. Piston Size Bore Size Wiseco (photo)  Pro Parts  Pro -V 

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Mercury Outboard 135HP  1970-71 Cross Flow  

6

STD 2.875 3109PS (Wiseco) - -

- 9000 (Pro) -

- - 9000V (Pro - V)

.015 2.890 - 9015 (Pro) -

- - 9015V (Pro - V)

.020 2.895 3109P2 (Wiseco) - -

.030 2.905 3109P3 (Wiseco) - -

9030 (Pro) -

9030V (Pro - V)

.040 2.915 3109P4 (Wiseco) - -

           
Mercury Outboard 135HP  1981-91    2 liter V6     No longer available      
       
       
           
       
       
           
       
       
           
       
       
           
       
       
           
       
       
           
       
       
           
       
       
           
           
           
           
Mercury Outboard 135HP  1992-00 liter with boost port (top guided)  V6 STD Port 3.125 3140PS (Wiseco) - -

- 4000P (Pro) -

4000PV (Pro-v)

STD Star 3.125 3140SS (Wiseco) - -

4000S (Pro) -

4000SV (Pro-v)

.015 Port 3.140 - - - -
4015P (Pro) -

4015PV (Pro-V)

.015 Star 3.140
4015S (Pro) -

4015SV (Pro-V)

.020 Port 3.145 3140P2 (Wiseco) - -

- - - -
- - - -
.020 Star 3.145 3140S2 (Wiseco) - -

- - - -
- - - -
.030 Port 3.155 3140P3 (Wiseco) - -

4030P (Pro) -

- 4030PV (Pro-V)

.030 Star 3.155 3140S3 (Wiseco) - -

4030S (Pro) -

- 4030SV (Pro-V)

.040 Port 3.165 3140P4 (Wiseco) - -

- - - -
- - - -
.040 Star 3.165 3140S4 (Wiseco) - -

- - - -
- - - -
140HP  1972 Inline 6 Cross Flow  

6

STD 2.875 3109PS (Wiseco) - -

- 9000 (Pro) -

- - 9000V (Pro - V)

.015 2.890 - 9015 (Pro) -

- - 9015V (Pro - V)

.020 2.895 3109P2 (Wiseco) - -

.030 2.905 3109P3 (Wiseco) - -

9030 (Pro) -

9030V (Pro - V)

.040 2.915 3109P4 (Wiseco) - -

140HP  1972 Inline 6 Cross Flow Low Dome  6 STD 2.875 3123PS (Wiseco)

2300 (Pro)

2300V (Pro-v)

.015 2.890 -
2315 (Pro)

2315V (Pro-v)

.020 2.895 3123P2 (Wiseco)

-
-
.030 2.905 3123P3 (Wiseco)

2330 (Pro)

2330V (Pro-v)

.040 2.915 3123P4 (Wiseco)

-
-
Mercury 150HP  1979-91    2 liter V6     No Longer Available