Mercury Outboard Propeller 10 Three Eighths Inch Diameter 13 Pitch 3 Blade Aluminum Right Hand Rotation 10 Spline OEM 48-19640A40 Upgrade For 9.9 15 18 20 25HP Motors Boats

10-3/8in Aluminum Outboard Propeller, 13 Pitch, RH 3-Blade
✔️ OEM 48-19640A40, 10-spline, Right-Hand, 3-blade, black aluminum

This aluminum 3-blade outboard propeller measures 10-3/8 inches in diameter with 13 pitch, designed for small outboard motors in the 9.9-25HP range. It uses a 10-spline hub and right-hand rotation for common engine setups, making it a reliable OEM-style upgrade for boats in this class. Sold as a single unit to fit most setups.

✅ Diameter 10-3/8 in, Pitch 13, 3 blades, Right-hand rotation, Aluminum
✅ OEM Ref 48-19640A40, 10-spline hub
✅ Fits 9.9-25HP engines, easy install on compatible boats
✅ Black finish, durable aluminum construction for marine use

💡 What is an outboard propeller and how does a 10-3/8 inch diameter, 13 pitch aluminum prop affect performance?

Here's a handy, concise answer for shoppers:

- It's designed to improve top speed, acceleration, and efficiency on small HP boats - The 3-blade design offers balanced thrust and smoother operation - Right-hand rotation matches most engine setups and prop orientation - Aluminum construction keeps weight down and resists marine corrosion