Specifications

Chapter 3 – Boat Systems
A.16. Flo-Torq
Assembly
To protect the propeller, engine, and lower gear unit gears, Defender Class
boats have the Mercury Marine Flo-Torq II propeller cushion hub kit
(Figure 3-14) on the installed propellers. The hub kit reduces the shock on
the lower unit gears and engine when shifting gears, and also absorbs shock
if the propeller hits an object. The hub kit is a safety device designed to
break down and slip under excessive torque loading. The cost of the
sacrificial cushion hub replacement is relatively inexpensive when compared
with expensive engine damage.
Figure 3-14
Flo-Torq II System
3-16