Oversize Piston Kit – 82.25mm (+0.25mm)
Fits Yamaha 75HP, 80HP, 85HP, 90HP 3-Cylinder 2-Stroke Outboards

This complete set of three oversize pistons is designed for rebuilding Yamaha 3-cylinder 2-stroke outboards. Each piston is precision-machined to 82.25mm (+0.25mm oversize) and includes the required rings, pin, and clips for a proper install.

Includes (x3 Pistons):
• 3 x Oversize pistons (82.25mm)
• 3 x Ring sets
• 3 x Wrist pins
• 6 x Circlips

Fits Yamaha 2-Stroke Models (Approx. 1990 & Newer):
• 75HP
• 80HP
• 85HP
• 90HP
(3-cylinder)

⚠️ Not all variants of these models are compatible. Please contact us with your engine number if you’re unsure.

Replaces OEM Yamaha Part Numbers:
• 688-11635-03
• 6H1-11635-0300 (and variants)

⚓ Why Buy from SSI Marine?

• High-quality marine engine components in UK stock
• Same-day dispatch before 1PM
• Tracked shipping options
• Expert support from marine professionals

Rebuild your Yamaha with confidence — SSI Marine delivers reliable parts you can trust.

Piston Kit Oversize 0.25 for YAMAHA OUTBOARD 75 80 85 90 HP 2 str 688-11635-03K