Keep your Mercury running like new with this genuine SHAFT,PINION. Built to the same exacting standards as your original equipment for worry-free boating.

Factory-built to exact Mercury Marine specifications, this component ensures reliable operation across all engine RPM ranges. Part number 34663 is manufactured to exact Mercury Marine factory specifications for precision installation and optimal performance. Constructed from premium marine-grade materials designed to withstand harsh saltwater and freshwater environments.

Factory parts exist for a reason — they work. Part 34663 undergoes rigorous Mercury Marine quality testing that aftermarket manufacturers skip. The result? Reliable performance season after season.

Compatible Mercury Marine Engines

FITS:

• Compatible with Mercury Marine engines
• OEM genuine Mercury part

COMPLETE SERIAL NUMBER COMPATIBILITY:

HP Models

• HP OUTBOARD (Accessories)

Looking for your Mercury engine serial number? Our helpful guide shows you exactly where serial numbers are located on different engines.

Verification & Support

Want to verify compatibility for part 34663? Use our parts finder tool for instant confirmation. Still have questions? No problem – use the contact buttons at the bottom of this page to reach us by text, call, or email

Serving boaters for over 40 years. Best prices guaranteed – free shipping on orders over $100.