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This is a set of six (6) Vertex Piston Kits for the Mercury V6 2.5 Liter produced between 1992 and 2005 including 150, 175, 200, 225, 245, 260, 280, and 300 HP models.


Because of a cast piston’s ability to contain higher silicon content compared to forged pistons, and because two-strokes have lower cylinder pressures when compared to four-strokes, cast pistons are ideal for two-stroke engines. Vertex pistons are gravity-cast from an aluminum alloy with 18% silicon content. Silicon is important because:


  • It decreases thermal expansion, which changes the geometry after the piston reaches operating temperature. With low thermal expansion characteristics, Vertex pistons can be run at tighter tolerances compared with forged pistons. This creates better power and performance, also making them less susceptible to rattling or breaking.
  • Silicon gives the pistons better wear characteristics and prolongs piston life by decreasing wear on the piston skirt.


Each kit includes:

  • Six (6) Top-Guided Pistons (three (3) Port and three (3) Starboard)
  • Six (6) Slip-Fit Wrist Pins
  • Twelve (12) Rings 
  • Twelve (12) sealed Wiseco Circlips
  • Higher Transfer Port vs Stock
  • Forged from aerospace-grade aluminum
  • Vertex Slip Coating


Please select your bore size (Standard, .015" over, .030" over)


Please feel free to contact Mike Hill at 714-697-1716 to discuss the bore size for your run applications before you finish honing. 

6 Vertex Piston Kits for Mercury 2.5 Liter

SKU: V2500-77
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