Express Mach3 Propeller 14.25x19 – 3-Blade Stainless Steel, RH Rotation | 90–300+hp (4.75" Gearcase)
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Express Mach3 Propeller — 14.25 x 19, 3-Blade Stainless Steel, Right-Hand Rotation
The Express Mach3 is a premium 3-blade stainless steel propeller built on nearly 40 years of race boat and high-performance prop design expertise. Engineered for outboards and sterndrives from 90 to 300+hp with 4.75-inch gearcases, it delivers best-in-class top-end speed, sharp cornering, and a strong hole shot — all in a single prop that outperforms both OEM aluminum and older-generation stainless designs.
Best Use Case
The 3-blade Mach3 in 14.25 x 19 pitch is the right choice for performance-oriented boaters running lighter, faster hulls — center consoles, performance runabouts, and bay boats — where top-end speed is the primary goal. The 19-pitch is a higher-pitch option that rewards boats already getting on plane easily and running in the upper RPM range. It’s an excellent upgrade for boaters looking to extract maximum speed from a well-matched engine and hull combination.
Key Features
- TP17™ Proprietary Stainless Steel — Formulated specifically for the Mach3 and Mach4 series. 20% higher chromium content than standard stainless for superior corrosion resistance and a higher-gloss finish. Nearly 250% stronger and 5x more durable than conventional stainless steel alloys.
- Performance-Tuned Geometry — Aggressive pitch angles, radical blade profiles, and sharp cup deliver maximum speed while maintaining strong acceleration and precise cornering.
- Large Exhaust Ports — Oversized exhaust flow pathways reduce back-pressure and free up horsepower at wide-open throttle.
- Race-Proven Finish — State-of-the-art casting and finishing processes drawn from decades of race boat development.
- Broad Engine Compatibility — Fits COX, Evinrude, Honda, Johnson, Mariner, Mercury, MerCruiser, Nissan, OMC, OXE, Parsun, Suzuki, Tohatsu, Volvo Penta, and Yamaha outboards and sterndrives.
Specifications
- Part Number: 31501912
- Diameter x Pitch: 14.25" x 19"
- Blades: 3
- Material: TP17™ Stainless Steel
- Rotation: Right-Hand (Standard)
- Gearcase: 4.75" (large)
- Compatible Engine Range: 90–300+hp outboards & sterndrives
- Hub System: 500-Series hub kit (under 200hp) or 700-Series hub kit (200hp+) required — sold separately
Parts Desk Insights
Hub kit required — not included. This propeller requires either a 500-Series or 700-Series hub kit depending on your engine’s horsepower. Confirm your engine make, model, and year against the application chart to select the correct kit before ordering.
The 19-pitch is a higher-pitch option best suited to lighter hulls that are already well-matched to their engine. If your engine is struggling to reach its recommended RPM range at wide-open throttle, drop down to a 17-pitch for better acceleration and load carrying. If you want the handling and load advantages of a 4-blade at this pitch, see the Express Mach4 14 x 19 — 4-Blade SS, RH. Also available in left-hand rotation: Express Mach3 14.25 x 19 — 3-Blade SS, LH.
Browse the full Mach3 lineup by pitch:
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.