OEM Grade Piston Kit .25mm Oversize Compatible with 2016-2022 Yamaha F75 F90 75HP 90HP 4-Stroke 4-Cylinder Outboard 80.75mm Bore Marine EFI Engine 6FP-11631-01-00 6FP-11635-01-00

Piston Kit .25mm Oversize Compatible with 2016-2022 Yamaha 75HP 90HP 4-Stroke 4-Cylinder Outboard (80.75mm Bore)
Direct replacement piston kit for 2016-2022 Yamaha F75 and F90 4-stroke 4-cylinder outboard motors. .25mm oversize (80.75mm finished bore). Cast aluminum alloy piston kit includes piston, rings, wrist pin, and pin clips for a complete single-cylinder rebuild. Fits all F75 and F90 models including jet drive variants.

OEM CROSS-REFERENCE PART NUMBERS:
• 6FP-11631-00-00 (Standard)
• 6FP-11631-01-00 (Supersedes 6FP-11631-00-00)
• 6FP-11635-01-00 (Oversize)

SPECIFICATIONS:
• Type: Piston Kit with Rings
• Oversize: .25mm Over
• Standard Bore: 80.5mm (3.170")
• Finished Bore: 80.75mm
• Configuration: Inline 4-Cylinder
• Engine Type: 4-Stroke SOHC/DOHC EFI
• Horsepower: 75HP, 90HP
• Kit Contents: Piston, Rings, Wrist Pin, Pin Clips
• Material: Cast Aluminum Alloy

APPLICATIONS:
• Yamaha F75 4-Stroke 75HP (2017-2022)
• Yamaha F90 4-Stroke 90HP (2016-2022)
• Yamaha F90 Jet 4-Stroke 90HP (2017-2022)
• All shaft lengths and control variants

NOTES:
• Kit is for ONE cylinder — order 4 for complete 4-cylinder rebuild
• Requires cylinder boring to 80.75mm

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