Turning Point Express Mach3 3-Blade Stainless Steel Propeller — 4.75"+ Gearcase — Large-Diameter Offshore

$523.71 $898.00

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Description

The Turning Point Express Mach3 OS is a 3-blade stainless steel propeller housing in the 4.75-inch and larger gearcase family. The large-diameter OS design is intended for high-horsepower bay boats, offshore center consoles and pontoons/tri-toons. 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
31511110	PD-67801	15.6 in	11 in	Right Hand	Stainless Steel	3
31511310	PD-67803	15.6 in	13 in	Right Hand	Stainless Steel	3
31511320	PD-67804	15.6 in	13 in	Left Hand	Stainless Steel	3
31511510	PD-67805	15.6 in	15 in	Right Hand	Stainless Steel	3
31511520	PD-67806	15.6 in	15 in	Left Hand	Stainless Steel	3
31511710	PD-63350	15.6 in	17 in	Right Hand	Stainless Steel	3
31511720	PD-63351	15.6 in	17 in	Left Hand	Stainless Steel	3
31511910	PD-63352	15.6 in	19 in	Right Hand	Stainless Steel	3
31511920	PD-63353	15.6 in	19 in	Left Hand	Stainless Steel	3
31512110	PD-63354	15.6 in	21 in	Right Hand	Stainless Steel	3
31512120	PD-63355	15.6 in	21 in	Left Hand	Stainless Steel	3
31512310	PD-63356	15.6 in	23 in	Right Hand	Stainless Steel	3
31512320	PD-63357	15.6 in	23 in	Left Hand	Stainless Steel	3
31512510	PD-80069	15.6 in	25 in	Right Hand	Stainless Steel	3
31512710	PD-80071	15.6 in	27 in	Right Hand	Stainless Steel	3

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.

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.

Hub kit and engine application chart — OS prop housing
Engine application and fitment requirements	Shop hub kit
15-spline Evinrude/Johnson large-gearcase V4, V6 and V8 applications listed in the chart, including specified non-G2 E-TEC and H.O. models. OMC Cobra 800 3.0–7.5 L, King Cobra 454/502/7.4–8.2 L (1990+) and Sea Drive 2.0–4.0 L. Excludes E-TEC G2; OMC SX uses the Volvo SX selection.	Kit 502 — 11500200
15-spline Evinrude E-TEC G2: 140 hp with large gearcase and 150 H.O.–300 hp. Use Super Duty 711 on 200+ hp engines with stainless props.	Kit 511 — 11501100
Super Duty for 15-spline Evinrude E-TEC G2 200+ hp engines using stainless props. Does not imply fitment to earlier non-G2 E-TEC gearcases.	Kit 711 — 11701100
15-spline Honda BF115D (2011+), BF135/150 (2004+), BF200/225 (2002+), BF250 (2012+); Tohatsu BFT115 (2014–2020), BFT150/200/225/250. For 200+ hp engines with stainless props, the chart calls for Super Duty 708.	Kit 508 — 11500800
Super Duty for listed 15-spline Honda and Tohatsu BFT applications using stainless props on 200+ hp engines. Check the exact model/year; do not substitute for a smaller Honda gearcase.	Kit 708 — 11700800
15-spline large-gearcase Mercury/Mariner models listed in the manufacturer chart; MerCruiser Alpha One / Bravo One (1983+). For 200+ hp Bravo One drives with stainless props, use kit 701 instead. Excludes 19-spline HD shafts.	Kit 501 — 11500100
Super Duty for listed 15-spline Mercury/Mariner 200+ hp stainless-prop applications and MerCruiser Bravo One 200+ hp with stainless props. Not the 19-spline Mercury fat-shaft kit. Check the exact drive in Prop Wizard.	Kit 701 — 11700100
Sound-dampening hub for listed 15-spline Mercury/Mariner large-gearcase outboard applications. Match exact model/year in the manufacturer chart. Excludes 19-spline HD shafts.	Kit 801F — 11800100
MasterTorq fat-shaft kit for Mercury/MerCruiser 19-spline, 1.25-inch HD shafts with 5.25–5.44-inch gearcases: specified Pro XS/Torque Master, Verado 300–400, Sport Master/Fleet Master, and Bravo One XR/XZ applications. Not the standard 1-inch, 15-spline kit. Confirm the exact gearcase.	Kit 621 — 11602100
15-spline Suzuki DT150–225 and DF150–300. DF four-stroke applications require Express Mach3 OS props only. Match the duty rating and engine to the chart; 717 and 817F are separate choices.	Kit 517 — 11501700
Super Duty for listed 15-spline Suzuki applications; Suzuki DF150–300 and Johnson four-stroke 200–225 require Express Mach3 OS props only.	Kit 717 — 11701700
MasterTorq sound-dampening option for listed 15-spline Suzuki DT150–225 / DF150–300 applications. DF four-stroke applications require Express Mach3 OS props only.	Kit 817F — 11801700
19-spline Volvo Penta SX and OMC SX Cobra, 3.0–8.2 L (1994+). Not for Volvo DuoProp or Aquamatic drives.	Kit 504 — 11500400
MasterTorq kit specified for Express Mach3 OS prop housings on listed 15-spline Yamaha 150–250 and V6 F300 (2009+) applications. The chart specifies Turning Point trim tab 41505060 if an OS prop strikes the trim tab. Yamaha F350 is listed separately with kit 715.	Kit 805FT — 11800510
Yamaha F350 application. Use Express Mach3 OS series props only; do not assume fitment to V6 F300 or other Yamaha models.	Kit 715 — 11701500

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

California Proposition 65

Warning 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.