Starboard Side .040 Over Piston Kit with Rings Compatible with 1988-2006 Mercury Mariner V4 2-Stroke 100HP 115HP 125HP Outboard Motor 3.415 Bore 326764 326765

Starboard Side Piston Kit .040 Oversize Compatible with 1988-2006 Mercury Mariner 100HP-125HP V4 2-Stroke Outboard 3.415" Bore
Direct replacement .040 oversize starboard side piston kit for 1988 through 2006 Mercury and Mariner V4 2-stroke outboard motors with 3.375" standard bore. Fits 100HP, 115HP, and 125HP V4 models. Kit includes cast aluminum piston machined to 3.415" bore (.040 oversize over 3.375" standard), piston ring set, wrist pin, and circlip retainers for a complete single-cylinder rebuild. V4 engines require 2 port + 2 starboard pistons for complete rebuild.

OEM CROSS-REFERENCE PART NUMBERS (STARBOARD SIDE):
• 326764 (wrist pin)
• 326765 (circlip retainers)

SPECIFICATIONS:
• Type: Starboard Side Piston Kit with Rings
• Size: .040 Oversize
• Bore: 3.415" (.040 oversize over 3.375" standard)
• Engine: V4 2-Stroke Carbureted / EFI
• Horsepower: 100HP, 115HP, 125HP
• Side: Starboard
• Kit Contents: Piston, Ring Set, Wrist Pin, Circlip Retainers
• Material: Cast Aluminum

APPLICATIONS:
• 100HP V4 2-Stroke (1988-2006)
• 115HP V4 2-Stroke (1988-2006)
• 125HP V4 2-Stroke (1988-2006)

NOTES:
• Starboard and starboard pistons differ — verify correct side before ordering
• Order 2 port + 2 starboard kits for complete V4 engine rebuild

⚠️ Verify OEM part number from your original engine before ordering.