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 90HP-125HP

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.

Mercury Outboard Sport Jet is a Force outboard motor. Look under Chrysler / Force Outboard Motor

Model Cyl. Piston Size Bore Size Wiseco  Pro Parts  Pro-V 

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90HP 1994-00

loop charge

3  STD 3.500 3162PS (Wiseco)    

  6200 (Pro)  

  6200V (Pro-v)

.015 3.515   6215 (Pro)

  6215V (Pro-v)

.020 3.520 3162P2 (Wiseco)  

.030 3.530 3162P3 (Wiseco)

6230 (Pro)

    6230V (Pro-v)

.044 3.544 3162P4 (Wiseco)

100HP  1989-91

loop charge by Wiseco 

4 STD 3.375 3120PS (Wiseco)    

  2611 (Pro)

    2611V (Pro-v)

.010 3.385 3120P1 (Wiseco)

.015 3.390   2613 (Pro)  

    2613V (Pro-v)

.020 3.395 3120P2 (Wiseco)    

.030 3.405 3120P3 (Wiseco)  

2615 (Pro)

  2615V (Pro-v)

.040 3.415 3120P4 (Wiseco)    

100HP 1992-93

top guided,

 Loop Charge 

4
.010 3.385 3142P1 (Wiseco)  

.015 3.390 4215 (Pro)

  4215V (Pro-v)

.020 3.395 3142P2 (Wiseco)  

.030 3.405 3142P3 (Wiseco)  

  4230 (Pro)  

    4215V (Pro-v)

100HP  1994-01

 Loop Charge

3 STD 3.500 3162PS (Wiseco)  

6200 (Pro)

6200V (Pro-v)

.015 3.515   6215 (Pro)  

    6215V (Pro-v)

.020 3.520 3162P2 (Wiseco)    

.030 3.530 3162P3 (Wiseco)    

  6230 (Pro)  

    6230V (Pro-v)

.044 3.544 3162P4 (Wiseco)    

115HP  1970-83

Wiseco Crossflow

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)    

115HP  1984-88

Crossflow 

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)    

      -
      -
115HP  1989-91

loop charge

4 STD 3.375 3120PS (Wiseco)  

2611 (Pro)

  2611V (Pro-v)

.010 3.385 3120P1 (Wiseco)    

.015 3.390   2613 (Pro)  

    2613V (Pro-v)

.020 3.395 3120P2 (Wiseco)    

.030 3.405 3120P3 (Wiseco)     

  2615 (Pro)  

    2615V (Pro-v)

.040 3.415 3120P4 (Wiseco)    

115HP 1992-93

top guided,

  Loop Charge 

4
.010 3.385 3142P1 (Wiseco)    

.015 3.390   4215 (Pro)  

    4215V (Pro-v)

.020 3.395 3142P2 (Wiseco)    

.030 3.405 3142P3 (Wiseco)    

  4230 (Pro)  

    4230V (Pro-v)

115HP 1994-00

125HP  1994-00

Loop Charge

4 STD 3.500 3162PS (Wiseco)    

  6200 (Pro)  

    6200V (Pro-v)

.015 3.515   6215 (Pro)  

    6215V (Pro-v)

.020 3.520 3162P2 (Wiseco)    

.030 3.530 3162P3 (Wiseco)    

  6230 (Pro)  

    6230V (Pro-v)

.044 3.544 3162P4 (Wiseco)