.030 Over Piston Kit with Rings Compatible with 1991-2006 Mercury Mariner 50HP-70HP Inline 3-Cylinder 2-Stroke Outboard Motor 2.905 73.75mm Bore 2704-821896A4 326764

Piston Kit .030 Oversize Compatible with 1991-2006 Mercury Mariner 50HP-70HP 3-Cylinder 2-Stroke Outboard 2.905" (73.75mm) Bore
Direct replacement .030 oversize piston kit for 1991 through 2006 Mercury and Mariner inline 3-cylinder 2-stroke outboard motors with 2.875" (73mm) standard bore. Fits 50HP, 60HP, and 70HP models. Kit includes cast aluminum piston machined to 2.905" (73.75mm) bore (.030 oversize over 2.875" standard), piston ring set, wrist pin, and circlip retainers for a complete single-cylinder rebuild. Symmetrical piston design fits all cylinders — order 3 kits for complete rebuild.

OEM CROSS-REFERENCE PART NUMBERS:
• 2704-821896A4
• 2704-826191A4 (standard reference)
• 326764 (wrist pin)
• 326765 (circlip retainers)

SPECIFICATIONS:
• Type: Piston Kit with Rings
• Size: .030 Oversize
• Bore: 2.905" (73.75mm) (.030 oversize over 2.875" standard)
• Engine: Inline 3-Cylinder 2-Stroke Carbureted
• Horsepower: 50HP, 60HP, 70HP
• Piston Type: Symmetrical (fits all cylinders)
• Kit Contents: Piston, Ring Set, Wrist Pin, Circlip Retainers
• Material: Cast Aluminum

APPLICATIONS:
• 50HP 3-Cylinder 2-Stroke (1991-2006)
• 60HP 3-Cylinder 2-Stroke (1991-2006)
• 70HP 3-Cylinder 2-Stroke (1991-2006)

NOTES:
• Symmetrical piston — same piston fits all cylinders
• Order 3 kits for complete 3-cylinder engine rebuild

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