The Mercury Marine / Quicksilver Tabbed Prop Hub Washer part number 14-76281 is a key component used in the Flo-Torq II propeller hub system, which is designed to protect outboard and sterndrive engines by absorbing shock and reducing the chance of propeller damage during impact.
 
The tabbed washer specifically locks the prop nut in place, preventing it from loosening while the engine is running. It's commonly used in conjunction with other components in the Flo-Torq hub kit, which allows for easy installation and removal of propellers on Mercury outboards and MerCruiser sterndrives.
 
Running a tabbed prop washer serves several important purposes in a marine drive or propulsion system:
 
Prevents Prop Nut Loosening: The tabs on the washer are designed to lock the prop nut in place. As the boat operates, vibrations and torque can cause the prop nut to loosen. A tabbed washer holds it securely, ensuring the prop stays in place.
Improves Propeller Alignment: By ensuring the nut stays tight, the tabbed washer helps maintain the correct alignment of the propeller. This is essential for smooth operation and reduces the risk of wobbling or misalignment that could damage the prop shaft or lower unit.
Increases Safety: If the prop nut loosens, the propeller can detach from the shaft, which can be dangerous, especially at high speeds. A tabbed washer minimizes this risk by securely locking the nut in place.
Simplifies Maintenance: The tabbed washer makes it easier to apply the correct amount of torque when tightening the prop nut and simplifies removal during routine maintenance.
 
It's a key component in systems like Mercury's Flo-Torq, which is designed to protect both the propeller and the engine from damage caused by impact or excessive torque.