OEM Grade Piston Kit .010 Oversize Compatible with 1986-2006 Mercury Mariner 9.9HP 15HP 2-Cylinder 2-Stroke Outboard Motor 2.372 60.25mm Bore 777-815965A4 326764 326765

Piston Kit .010 Oversize Compatible with 1986-2006 Mercury Mariner 9.9HP 15HP 2-Cylinder 2-Stroke Outboard 2.372" (60.25mm) Bore
Direct replacement .010 oversize piston kit for 1986 through 2006 Mercury and Mariner inline 2-cylinder 2-stroke outboard motors with 2.362" (60mm) standard bore. Fits 9.9HP and 15HP models. Kit includes cast aluminum piston machined to 2.372" (60.25mm) bore (.010 oversize over 2.362" standard), piston ring set, wrist pin, and circlip retainers for a complete single-cylinder rebuild. Symmetrical piston design fits all cylinders — order 2 kits for complete rebuild.

OEM CROSS-REFERENCE PART NUMBERS:
• 777-815965A4 (standard reference)
• 326764 (wrist pin)
• 326765 (circlip retainers)

SPECIFICATIONS:
• Type: Piston Kit with Rings
• Size: .010 Oversize
• Bore: 2.372" (60.25mm) (.010 oversize over 2.362" standard)
• Engine: Inline 2-Cylinder 2-Stroke Carbureted
• Horsepower: 9.9HP, 15HP
• Piston Type: Symmetrical (fits all cylinders)
• Kit Contents: Piston, Ring Set, Wrist Pin, Circlip Retainers
• Material: Cast Aluminum

APPLICATIONS:
• 9.9HP 2-Cylinder 2-Stroke (1986-2006)
• 15HP 2-Cylinder 2-Stroke (1986-2006)

NOTES:
• Symmetrical piston — same piston fits all cylinders
• Order 2 kits for complete 2-cylinder engine rebuild

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