OEM Grade Piston Kit .010 Oversize Compatible with 1987-2006 Mercury Mariner 80HP 90HP 100HP 115HP Inline 4-Cylinder 2-Stroke Outboard 3.385 Bore 774-8600A3 7437A3

Piston Kit .010 Oversize Compatible with 1987-2006 Mercury Mariner 80HP-115HP Inline 4-Cylinder Outboard 3.385" Bore
Direct replacement .010 oversize piston kit for 1987 through 2006 Mercury and Mariner inline 4-cylinder 2-stroke outboard motors with 3.375" standard bore. Kit includes cast aluminum piston machined to 3.385" bore (.010 oversize over 3.375" standard), piston ring set, wrist pin, and circlip retainers for a complete single-cylinder rebuild. Symmetrical piston design fits all cylinders — order 4 kits for complete inline 4-cylinder rebuild.

OEM CROSS-REFERENCE PART NUMBERS:
• 774-8600A3 (standard reference)
• 7437A3
• 774-9137A9
• 8199A3
• 8200A4
• 326764 (wrist pin)
• 326765 (circlip retainers)

SPECIFICATIONS:
• Type: Piston Kit with Rings
• Size: .010 Oversize
• Bore: 3.385" (.010 oversize over 3.375" standard)
• Engine: Inline 4-Cylinder 2-Stroke
• Horsepower: 80HP-115HP
• Piston Type: Symmetrical (fits all cylinders)
• Kit Contents: Piston, Ring Set, Wrist Pin, Circlip Retainers
• Material: Cast Aluminum

APPLICATIONS:
• 80HP Inline 4-Cylinder (1987-1998)
• 90HP Inline 4-Cylinder (1987-2006)
• 100HP Inline 4-Cylinder (1988-1998)
• 115HP Inline 4-Cylinder (1987-2006)

NOTES:
• Symmetrical piston — same piston fits all cylinders
• Order 4 kits for complete inline 4-cylinder engine rebuild

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