Mercury / Mariner outboard motor section
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******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 175HP-200HP
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) 209-5747 for 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  Pro Parts   PRO-V 

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175HP  78-91 2.4 liter loop charge (XR4)  specify rings for sleeved hole. 

200 HP 1978- 1990 2.4 liter Chrome Block STD.

200HP 1983- 1990

 When using this piston in a sleeved block, bore is 3.377" and uses a different ring.

You need to specify different rings for a sleeved hole, e-mail dstiber @aol.com

 V6
STD Port 3.375 3102PS (Wiseco) - -

- 2100P (Pro) -

-   2100PV (Pro-v)

STD Star 3.375 3102SS (Wiseco) - -

- 2100S (Pro) -

- - 2100SV (Pro-v)

.010 Port 3.385 3102P1 (Wiseco) - -

- - - -
- - - -
.010 Star 3.385 3102S1 (Wiseco) - -

- - - -
- - - -
.015 Port 3.390 - - - -
  2115P (Pro) -

- - 2115PV (Pro-V)

.015 Star 3.390 - - - -
- 2115S (Pro) -

- - 2115SV (Pro-V)

.020 Port 3.395 3102P2 (Wiseco) - -

- - - -
- - - -
.020 Star 3.395 3102S2 (Wiseco) - -

- - - -
- - - -
.030 Port 3.405 3102P3 (Wiseco) - -

  2130P (Pro) -

- - 2130PV (Pro-V)

.030 Star 3.405 3102S3 (Wiseco) - -

  2130S (Pro) -

- - 2130SV (Pro-V)

 
175HP  1992-02 

2.5 liter;

175 HP 1992-02

2.5 liter XRI ;

200HP 1992 - 2000 2.5 liter;

200HP 1992 - 2000 Offshore 2.5L

200HP 1992- 2000 2.5 liter XR1, 

200HP 1992 - 2000 2.5 liter EFI

(top guided Rod)

 V6 STD Port 3.500 3137PS (Wiseco) - -

- 2500P (Pro) -

- - 2500PV (Pro-V)

STD Star 3.500 3137SS (Wiseco) - -

- 2500S (Pro) -

2500SV (Pro-V)

.015 Port 3.515 - - - -
- 2515P (Pro) -

- 2515PV (Pro-V)

.015 Star 3.515 - - - -
- 2515S (Pro) -

2515SV (Pro-V)

.020Port 3.520 3137P2 (Wiseco) - -

- - - -
- - - -
.020 Star 3.520 3137S2 (Wiseco) - -

- - - -
- - - -
.030 Port 3.530 3137P3 (Wiseco) - -

- 2530P (Pro) -

- 2530PV (Pro-V)

.030 Star 3.530 3137S3 (Wiseco) - -

- 2530S (Pro) -

- - 2530SV (Pro-V)

.044 Port 3.544 3137P4 (Wiseco) - -

- - - -
- - - -
.044 Star 3.544 3137S4 (Wiseco) - -

- - - -
- - - -
200HP  1991

2.5 liter,

200HP 1991 Offshore

2.5 liter

 V6 STD Port 3.500 3124PS (Wiseco) - -

- 2400P (Pro) -

    2400PV (Pro-v)

STD Star 3.500 3124SS (Wiseco) - -

- 2400S (Pro) -

    2400SV (Pro-v)

.015 Port 3.515 - - - -
- 2415P (Pro) -

    2415PV (Pro-V)

.015 Star 3.515 - - - -
- 2415S (Pro) -

    2415SV (Pro-V)

.020 Port 3.520 3124P2 (Wiseco) - -

- - - -
- - - -
.020 Star 3.520 3124S2 (Wiseco) - -

- - - -
- - - -
.030 Port 3.530 3124P3 (Wiseco) - -

- 2430P (Pro) -

    2430PV (Pro-V)

.030 Star 3.530 3124S3 (Wiseco) - -

- 2430S (Pro) -

    2430SV (Pro-V)

.044 Port 3.544 3124P4 (Wiseco) - -

- - - -
- - - -
.044 Star 3.544 3124S4 (Wiseco) - -

- - - -
- - - -