VQPROPs 3-Blade Aluminum Outboard Propeller RH 10 3/8 x 13, 13-Spline Hub Black for Mercury 25-70HP

The VQPROPs Your Props Marine 13 Spline Tooth Prop RH (10 3/8 x 13) is an aluminum, right-hand-turn outboard propeller built to replace OEM 48-73136A45 and fit Mercury 25–70HP engines for reliable performance and easy installation.

This three-blade propeller combines a 10 3/8" diameter with a 13" pitch and a 13-spline hub to match common Mercury lower units. Finished in black, the wheel is cast from aluminum to balance durability and lightweight responsiveness. The prop is offered as a direct replacement — check your engine’s model and the original prop’s diameter, pitch and spline count to ensure compatibility before ordering.

How does this prop affect acceleration and top speed?

This prop is designed to preserve a good balance between hole-shot acceleration and cruising speed for small to mid-range Mercury outboards. Aluminum construction helps the blades react quickly to throttle changes while maintaining a stable top-end rpm when matched to the correct pitch.

• Three-blade design for a blend of thrust and efficiency
• 13" pitch tuned for moderate top speed without sacrificing low-end power
• Aluminum material keeps weight low for quicker rev response

Will the hub and spline match my Mercury lower unit?

This prop uses a 13-spline hub and is listed as a replacement for OEM part 48-73136A45. Confirm the spline count and hub design on your current prop to guarantee a correct fit. If the spline or hub differs, the prop will not engage the driveshaft correctly.

• 13-spline hub compatible with specified Mercury lower units
• Double-check OEM numbers and your current prop’s spline count
• Simple swap when spline and diameter/pitch match

How do I choose the correct diameter and pitch for my boat?

Selecting diameter and pitch depends on hull type, motor horsepower, boat load and desired RPM range. This prop is 10 3/8" diameter with a 13" pitch — suitable for many lightweight planing boats on 25–70HP Mercury engines but always verify with your boat’s performance goals or consult a dealer for fine tuning.

• Diameter 10 3/8" for common small to mid-size planing hulls
• Pitch 13" yields balanced acceleration and cruising speed
• Best for 25–70HP Mercury engines when matched to boat/load

What should I expect in terms of durability and maintenance?

VQPROPs manufactures this wheel under controlled quality standards, offering a corrosion-resistant black finish and aluminum strength for everyday recreational use. Routine inspection for nicks, bends or hub wear is recommended — small impacts can affect balance and performance.

• Aluminum offers good corrosion resistance with proper care
• Inspect blades and hub after grounding or impact
• Easy to clean and reinstall for seasonal maintenance

Who is this for: This prop is intended for boat owners and operators using Mercury outboard motors in the 25–70HP range who need a direct replacement for OEM 48-73136A45 or who want an affordable aluminum prop offering solid acceleration and steady cruising. It's best for small to medium planing boats, anglers and recreational boaters who prioritize dependable fitment and straightforward installation. Before purchasing, confirm your engine's spline count, diameter and pitch match the listed specifications to ensure a correct swap and optimal performance.