Turning Point Express Mach4 4-Blade Stainless Steel Propeller — 4.25" Gearcase
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Turning Point Express Mach4 4-Blade Stainless Steel Propeller — 4.2...
Description
Description
The Turning Point Express Mach4 EX1/EX2 is a 4-blade stainless steel propeller housing in the 4.25-inch gearcase family. Its four-blade design is intended for boaters prioritizing acceleration, handling and load carrying. Engine fitment requires the correct separate installation/hub kit; gearcase family or horsepower alone does not establish compatibility.
Sold as one propeller housing. The engine-specific hub/installation kit is required and sold separately. Choose the exact propeller from the dropdown. Each choice lists diameter x pitch, rotation and manufacturer part number; use the specification table below to compare.
Exact specifications by part number
| Part number | PartsDuck SKU | Diameter | Pitch | Rotation | Material | Blades |
|---|---|---|---|---|---|---|
| 31430930 | PD-67798 | 14 in | 9 in | Right Hand | Stainless Steel | 4 |
| 31431130 | PD-63336 | 14 in | 11 in | Right Hand | Stainless Steel | 4 |
| 31431330 | PD-63339 | 14 in | 13 in | Right Hand | Stainless Steel | 4 |
| 31431530 | PD-55813 | 13.5 in | 15 in | Right Hand | Stainless Steel | 4 |
| 31431730 | PD-55814 | 13.25 in | 17 in | Right Hand | Stainless Steel | 4 |
| 31431740 | PD-63342 | 13.25 in | 17 in | Left Hand | Stainless Steel | 4 |
| 31431930 | PD-55815 | 13 in | 19 in | Right Hand | Stainless Steel | 4 |
| 31432130 | PD-63344 | 13 in | 21 in | Right Hand | Stainless Steel | 4 |
| 31432330 | PD-67799 | 13 in | 23 in | Right Hand | Stainless Steel | 4 |
Design details
- Separate prop housing and engine-specific installation kit allow the hub and prop to be selected for the application.
- TP17 stainless-steel construction.
- MaxSpeed balancing process.
- Swept Cleaver design for the 4.25-inch family.
Performance depends on hull, engine, load, mounting height and trim. A different blade count or design may require a different pitch even when replacing a prop with the same stamped pitch.
Hub and engine compatibility
Start with the exact engine manufacturer, model, year, gearcase and shaft spline count in Prop Wizard. The following kit references are application-dependent choices, not a list of interchangeable hubs. Applications marked four-blade-only or OS-only require that specified prop design.
| Engine application and fitment requirements | Shop hub kit |
|---|---|
| 13-spline 4.25-inch Evinrude/Johnson listed 2-, 3- and 4-cylinder applications, E-TEC 40–75 and specified 90/115/130, and G2 three-cylinder small-gearcase 115 H.O./140/150. OMC Cobra 400 2.3–3.0 L (1978–1989) and Sea Drive 1.6–1.8 L. Shaft length, year and gearcase exceptions apply; use the chart for the exact engine. | Kit 503 — 11500300 |
| 13-spline Suzuki DT75–140 (1989+) and DF60/70 (1998–2009); Johnson 4-stroke 60/70 (1998–2009), 4.25-inch gearcase family. | Kit 506 — 11500600 |
| 15-spline Force 75 (1999) / 90–150 (1995+), Honda 75/90 (1995–1998), and listed Mercury/Mariner 4.25-inch applications including Bigfoot/CT. Check exact Mercury model/year in the manufacturer chart. Also Suzuki/Johnson DF50AV/60AV/115A/140/140A; these require four-blade props. | Kit 501 — 11500100 |
| 15-spline Honda P60, 75/90 (1999+), 100/115 (not 115D)/130; Nissan/Tohatsu BFT W60/60/75/90 (2014–2020), 4.25-inch gearcase family. | Kit 507 — 11500700 |
| 15-spline, 4.25-inch gearcase: Nissan/Tohatsu 60C/70C, 70 (2002–2009), MFS75–140 (2021+), non-BFT 90–140 and 115 TLDI (2014+); Yamaha 2-stroke 115–130 and 4-stroke 75/90/100 (2017+), 115 hp. | Kit 505 — 11500500 |
| 15-spline 4.25-inch applications: Parsun T60/T75/T85/T90; Yamaha FT50/FT60 High Thrust, 2-stroke 60–100, 4-stroke 70 and 75/90/100 (2003–2016). If the prop strikes the Yamaha trim tab, the chart specifies Yamaha 6E5-45371-10. Verify engine year and kit selection in Prop Wizard. | Kit 500 — 11500000 |
| Suzuki/Johnson 4-stroke 70A/80A/90A and 70/80 (2009+), 90/100/115 (2001+, not 115A), 4.25-inch gearcase family. Use 4-blade props only. | Kit 509 — 11500900 |
| MasterTorq sound-dampening option for the listed 15-spline Yamaha 4.25-inch applications using kit 500: FT50/FT60, 2-stroke 60–100 and specified 4-stroke 70/75/90/100 model years. Check exact model/year before substituting. | Kit 800F — 11800000 |
| Sound-dampening hub for listed 15-spline Mercury/Mariner 4.25-inch outboard applications. Match exact model/year in the manufacturer chart. Excludes 19-spline HD shafts. | Kit 801F — 11800100 |
| Sound-dampening hub for 15-spline Yamaha 4.25-inch applications: 2-stroke 115–130 and 4-stroke 75/90/100 (2017+), 115 hp. | Kit 805F — 11800500 |
Choosing pitch and rotation
- Record the current prop part number, diameter, pitch and rotation.
- Check the engine maker’s recommended wide-open-throttle RPM range and record actual RPM and GPS speed with the normal passenger, fuel and gear load.
- Use Prop Wizard with the exact engine and boat details; do not select by horsepower alone.
- Confirm right-hand or left-hand rotation, particularly on twin-engine installations. Left-hand is not a substitute for right-hand.
- After installation, water-test under normal load and confirm operation within the engine maker’s RPM range.
Installation and package
Package: one propeller housing. Hub kit and engine-specific installation hardware are separate. Follow the installation-kit instructions and engine manual for washer order, shaft preparation, retaining hardware, torque and locking procedure. Check full rotation and trim-tab clearance before operation. Do not assume the old hub or hardware will fit the new prop.
Fitment tools and documents
- Turning Point Prop Wizard — verify engine fitment, pitch and hub kit
- Manufacturer 2025 engine, hub and prop selection chart
- Quick guide — 31431130
- Manufacturer brochure — 31431130
- Quick guide — 31431330
- Manufacturer brochure — 31431330
- Quick guide — 31431530
- Manufacturer brochure — 31431530
- Quick guide — 31431730
- Manufacturer brochure — 31431730
- Quick guide — 31431740
- Manufacturer brochure — 31431740
- Quick guide — 31431930
- Manufacturer brochure — 31431930
- Quick guide — 31432130
- Manufacturer brochure — 31432130
- Quick guide — 31432330
- Manufacturer brochure — 31432330
California Proposition 65
WARNING: This product can expose you to chemicals including LEAD which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.
