Express® Mach4 13x19 – 4-Blade Stainless Steel Propeller | 40–150hp (4.25" Gearcase)
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You have 30 days to request a return. All sale items are final sale.
Express® Mach4 13x19 – 4-Blade Stainless Steel Propeller
The Express® Mach4 13x19 is a premium 4-blade stainless steel propeller designed for boaters who need the acceleration, load-carrying capability, and rough-water stability of a 4-blade design — without sacrificing the top-end speed of a 3-blade prop. Its swept cleaver blade geometry delivers exceptional hole shot, superior stern lift, and confident handling in conditions where a 3-blade prop falls short.
Built with proprietary TP17™ stainless steel and engineered for 40–150hp outboards and sterndrives with 4.25" gearcases. Compatible with Evinrude®, Honda®, Johnson®, Mariner®, Mercury®, MerCruiser®, Nissan®, OMC®, Parsun®, Suzuki®, Tohatsu®, and Yamaha®. Requires a 500-series hub installation kit (sold separately).
Key Features
- 4-Blade Swept Cleaver Design: Delivers fast hole shot, strong stern lift, and smooth handling in rough water — while maintaining the top-end speed typically associated with 3-blade props.
- Superior Load Performance: The additional blade keeps the hull riding higher when fully loaded with passengers and gear, reducing speed loss compared to a 3-blade prop under heavy loads.
- Proprietary TP17™ Stainless Steel: Features 20% higher chromium content for superior corrosion resistance, a high-gloss finish, and exceptional strength and durability.
- Performance-Tuned Blade Geometry: Optimized pitch, rake angles, and tuned exhaust vents improve hole shot, reversibility, and all-around performance.
- Large Free-Flowing Exhaust Ports: Oversized exhaust pathways reduce backpressure and help the engine produce more usable horsepower.
- Advanced Casting Technology: State-of-the-art casting and finishing processes produce tighter tolerances and consistent blade-to-blade balance.
Specifications
- Diameter x Pitch: 13" x 19"
- Blades: 4
- Material: TP17™ Stainless Steel
- Rotation: Right-Hand (Standard)
- Gearcase: 4.25"
- Engine Range: 40–150hp
- Hub System: 500-Series (hub kit required, sold separately)
Compatible Engine Brands
Evinrude®, Honda®, Johnson®, Mariner®, Mercury®, MerCruiser®, Nissan®, OMC®, Parsun®, Suzuki®, Tohatsu®, Yamaha® — outboards and sterndrives. Always verify your specific engine make, model, and year against the application chart before ordering.
3-Blade Option at Same Pitch
Other Pitch Options – Express® Mach4 (4.25" Gearcase)
Required Hub Kit (Sold Separately)
Parts Desk Insights
Best Use Case: The Express® Mach4 13x19 is the go-to recommendation when a customer needs better hole shot, stern lift, or rough-water handling than their current 3-blade prop provides — without dropping top-end speed. It’s ideally suited for watersports boats (wakeboarding, waterskiing), tri-toons, bay boats, sterndrive applications, and any vessel that regularly runs with a full load of passengers and gear. If the customer is running light and prioritizes pure top-end speed on a calm lake, the Express® Mach3 13.25x19 is the better fit.
3-Blade vs. 4-Blade: The 4-blade Mach4 shines when the boat is loaded or when the customer wants better steering feel and stability in chop. The 3-blade Mach3 is faster on a lightly loaded hull in flat water. When a customer is on the fence, ask about their typical load and water conditions — that usually makes the choice clear.
Pitch Selection Tip: As a general rule, every 2" of pitch change shifts WOT RPM by approximately 200–400 RPM. If the engine is over-revving at WOT, move up in pitch; if it can’t reach WOT RPM range, move down. Note that 4-blade props typically load the engine slightly more than a 3-blade at the same pitch — the customer may need to drop 1" of pitch when switching from a 3-blade to a 4-blade.
Hub Kit Required: This propeller uses the 500-series hub system only. Always confirm the customer’s engine make, model, and year before recommending a hub kit. See the MasterGuard® Hub Kit 503 as the starting point, but verify against the application chart.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.