Mercury Prop 15.50R37 15D – 48-8M0003770

The Mercury Prop 15.50R37 15D (Part #48-8M0003770) is a high-performance stainless steel propeller designed to enhance acceleration, fuel efficiency, and top-end speed. With a 15" pitch and a 15.50" diameter, this right-hand rotation prop delivers balanced power and precision for a variety of boating conditions.

Key Features

Genuine OEM Mercury Propeller – Factory-tested and built to exact specifications for reliability and longevity

Premium Stainless Steel Construction – Durable and corrosion-resistant for both saltwater and freshwater environments

15.50” Diameter x 15” Pitch – Ideal for boats needing quick planing and smooth throttle response

Right-Hand Rotation (R37) – For engines requiring standard rotation setup

Designed for Performance – Reduces slip and improves bite in turns, helping maintain control at high speeds

Compatibility

The Mercury Prop 15.50R37 15D – 48-8M0003770 fits select Mercury outboards and MerCruiser sterndrive engines using a 15-spline hub and standard (right-hand) rotation. Always verify compatibility by checking your engine’s specs or providing your serial number to PartsVu support.

Ideal Use Cases

Replacing worn or damaged factory props

Boaters needing enhanced acceleration or towing performance

Vessels operating in mixed water conditions

Owners upgrading to a stainless steel prop for durability and responsiveness

Why Prop Selection Matters

Your propeller plays a direct role in how your boat handles, performs, and consumes fuel. The Mercury Prop 15.50R37 15D – 48-8M0003770 is engineered for consistent, smooth operation—even under heavy load—making it a smart investment for serious boaters who value efficiency and reliability.

Frequently Asked Questions

What boats is the 48-8M0003770 propeller suitable for?

It’s suitable for compatible Mercury and MerCruiser engines using a 15-spline hub and right-hand rotation. It works especially well on mid- to large-sized boats seeking better hole shot and efficiency.

What's the difference between a 15” and 18” pitch prop?

A 15” pitch provides quicker acceleration and better performance under load, while an 18” pitch is better for higher top-end speeds. The right pitch depends on your boating needs.

Why choose stainless steel over aluminum props?

Stainless steel offers greater strength and durability. It resists flexing under high RPMs, providing better control, acceleration, and resistance to impact damage in harsh environments.