663-85518-00 – Ball Joint – Yamaha

The 6638551800 ball joint is a genuine Yamaha OEM ball joint stud designed for use on select Yamaha outboard engines. This precision-made ball joint fits control linkages, steering arms, or pivoting components where smooth movement and secure fastening are essential. It lets rotating parts articulate while keeping them connected firmly to adjacent linkage or hardware.

Because ball joints allow controlled movement between linked parts, replacing an old, corroded, or loose one can restore precise steering feel, better throttle response, or proper trim linkage function. This Yamaha OEM joint works well during control-box servicing or when you refurbish steering and linkage systems on older or high-hour outboards.

This ball joint also suits enthusiasts doing DIY maintenance. The threaded stud and spherical head provide simple mechanical motion without binding. Whether it mounts in a control cable assembly or under a throttle arm, it helps maintain consistent motion where your engine and boom parts pivot.

Replace worn linkage ball joints to eliminate slack, reduce vibration, and restore crisp control response. The quality and fit of a genuine Yamaha part means it threads easily and seats securely without modification.

Install the 6638551800 ball joint to keep motion smooth and components aligned. This small part plays a big role in maintaining reliable control feel on your boat.

Shop at Arizona Outboard Dismantlers to keep your outboard running strong and ready for the water.