Turning Point 14x21 LH Mach4 Stainless Steel Propeller

The Turning Point Mach4 EX-1421-4L combines a 14-inch diameter, 21-inch pitch, and left-hand rotation in a four-blade stainless steel propeller. The directional specification is especially important on boats with counter-rotating propeller arrangements. This version belongs to the Express Mach4 family, whose added blade area is intended to maintain grip under demanding running conditions. It should be selected for its exact rotation and pitch rather than as a universal performance upgrade.

TP17 stainless steel forms the blades, and the Mach4 profile uses pronounced cupping along with progressive geometry. Turning Point also provides generous exhaust-flow passages through the propeller housing. A 21-inch pitch requires enough engine power to reach the specified operating RPM, so evaluating the current propeller is worthwhile. The same propeller design can behave differently on a light fishing boat and a heavier recreational hull.

Use the manufacturer’s selection chart to confirm the left-hand housing and its compatible engine-specific hub kit. That kit is required for installation and is not part of the propeller housing purchase. Check diameter clearance and gearcase requirements before replacing a different series or blade count. Browse our stainless steel propellers collection for additional drive configurations.

• Four-blade Mach4 grip and handling geometry
• Left-hand rotation for appropriate counter-rotating drives
• Cupped TP17 stainless blades
• Large exhaust-flow paths with separately required hub