Turning Point 621 Heavy-Duty Propeller Hub Kit

For larger propeller shafts, the Turning Point 621 hub kit is aimed at demanding Mercury outboard and drive applications. The supplier specifies a 1.25-inch propeller shaft and 4.75- to 5.44-inch gearcases, with engine applications in the 150 to 400-plus horsepower range. It can be used with compatible stainless steel propellers and selected aluminum propellers. This is a heavy-duty installation hub, not an additional propeller.

The kit uses a replaceable cushioning insert intended to absorb some of the shock at the propeller connection. It is designed for hand installation rather than requiring a hub press. That removable insert also allows service of the cushioned connection without automatically replacing the entire hub assembly. Turning Point lists a one-year materials and workmanship warranty for this specific 621 hub.

Propeller-shaft diameter alone does not confirm fitment, so check both the engine and propeller application before ordering. The manufacturer’s Prop Wizard provides the kit selection needed for the intended drive. This item is sold individually and should be installed with the correct thrust and fastening components. Find more hull protection and propeller equipment for marine propulsion systems.

• For specified Mercury applications with 1.25-inch propeller shafts
• Covers listed 150 to 400-plus HP, large-gearcase applications
• Replaceable cushioning insert for serviceability
• Hand-installable design; no hub press required