Hustler 4-Blade Aluminum Propeller – 13" x 21" | Right Hand Rotation

Hustler 4-Blade Aluminum Propeller – 13" x 21" | Right Hand Rotation

The Hustler 4-blade aluminum propeller at 13" x 21" combines the stern lift, acceleration, and load-handling advantages of a four-blade design with a high-pitch profile suited to engines that have WOT RPM headroom on lower-pitch props. It’s the highest-pitch 4-blade option in the Hustler aluminum lineup for 4.25" gearcase engines — delivering maximum top-end performance while retaining the four-blade benefits of improved hole shot, rough-water stability, and speed under load. Designed for 40–150 hp engines with 4.25" gearcases.

This is a high-pitch, specialized selection. If you’re unsure whether 21" pitch is right for your engine, compare against the 13" x 19" 4-blade or 13.25" x 17" 4-blade and confirm your current WOT RPM before ordering.

Key Features

• 4-blade performance at high pitch — Swept cleaver geometry delivers fast acceleration and maintains top-end RPM comparable to three-blade props, even at 21" pitch and under load.
• Lifts the hull higher — Increased stern lift reduces wetted surface area, minimizing speed loss when the boat is fully loaded — where a three-blade can lose up to 3 mph.
• Squeeze cast aluminum construction — High-density casting produces stiffer blades with less flex, improving propulsive efficiency over standard die-cast aluminum props.
• Tuned exhaust vents — Large free-flowing exhaust ports reduce backpressure, improving hole shot and best-in-class reversibility.
• Ultracoat™ five-step powder coat finish — Superior corrosion and abrasion resistance. Keeps the prop looking sharp season after season.
• Wide engine compatibility — Fits Evinrude®, Honda®, Johnson®, Mariner®, Mercury®, MerCruiser®, Nissan®, OMC®, Parsun®, Suzuki®, Tohatsu®, and Yamaha® outboards and sterndrives.

Specifications

• Diameter x Pitch: 13" x 21"
• Blades: 4
• Material: Aluminum
• Rotation: Right Hand (Standard)
• Gearcase Fit: 4.25"
• Engine Range: 40–150 hp
• Hub System: 500 Series hub kit required (sold separately)

Hub Kit Required

A 500 Series MasterGuard installation hub kit is required and sold separately. Browse the lineup to find the right kit for your engine:

• MasterGuard Hub Kit 500
• Hub Kit 501
• Hub Kit 502
• Hub Kit 503
• Hub Kit 504
• Hub Kit 505
• Hub Kit 506
• Hub Kit 507
• Hub Kit 508
• Hub Kit 509
• Hub Kit 510

Refer to the application chart for your engine’s required kit number.

Compare Models

Not sure 21" pitch is right for your engine? Browse lower-pitch options in the same family, or compare blade counts:

• Hustler 4-Blade Aluminum – 13" x 19" RH — one pitch step down, 4-blade
• Hustler 4-Blade Aluminum – 13.25" x 17" RH — mid-range pitch, strong all-rounder
• Hustler 4-Blade Aluminum – 13.5" x 15" RH — lower pitch, maximum hole shot
• Hustler 3-Blade Aluminum – 13.25" x 21" RH — 3-blade at similar pitch, maximum top-end speed
• Express Mach4 – 13" x 19" 4-Blade Stainless RH — stainless upgrade at similar pitch

Parts Desk Insights

Best use case: The 13" x 21" 4-blade is the right call when a customer wants the load-handling and stern lift advantages of a four-blade design at the highest pitch available in this gearcase family. It’s best suited to lighter, faster hulls on 40–150 hp engines where the customer has confirmed their engine runs below the bottom of its WOT RPM range on a 19" pitch prop and needs to pull RPM down further — while still wanting the four-blade benefits of better acceleration and rough-water stability over a three-blade. This is a specialized pitch selection; don’t recommend it without first confirming WOT RPM on a lower-pitch prop. If the customer hasn’t already tried 17" or 19" pitch, start there. For customers who want maximum top-end speed and don’t need four-blade load handling, the 3-blade 13.25" x 21" may have a slight top-end edge. Always confirm engine make, model, year, gearcase size, and current WOT RPM before recommending a pitch change.