YOUNG MARINE OEM Grade Aluminum Outboard Propeller 10 5/8in - Reliable

In this review of the YOUNG MARINE OEM grade aluminum outboard propeller, the bottom line is simple: this is a practical replacement for owners of Mercury 30-70HP engines who want near-OEM fit and dependable on-water performance. The reviewer found the propeller delivers solid acceleration, good top-end rpm, and straightforward installation; it is best for boaters seeking a cost-effective aftermarket option that matches the original diameter and pitch. The review focuses on build quality, fit, and everyday usability rather than racing-level gains.

Key Features

• Exact diameter and pitch: The 10 5/8in diameter and 12in pitch match original OEM dimensions so owners can expect predictable speed and handling.
• 13 spline tooth fit: The 13 spline tooth configuration ensures a secure mechanical match to compatible Mercury lower units for straightforward installation.
• High quality aluminum: The aluminum construction keeps weight down while offering corrosion resistance for typical freshwater and light saltwater use.
• Improved blade design: The redesigned blades aim to provide better water flow and slightly improved top speed and fuel response compared with older aftermarket designs.
• Aftermarket value: Sold as an aftermarket part with reference 48-73134A45, it offers OEM-equivalent sizing and a lower-cost replacement option.
• Return accepted: A return policy is available, which reduces risk when confirming fit and performance on your specific boat and engine.

Who It's For

This propeller is intended for boat owners with Mercury outboard engines in the 30-70HP range who need a reliable, budget-conscious replacement that matches OEM diameter and pitch. It is especially useful for anglers, weekend boaters, and owners who value ease of installation and a near-original feel without paying OEM prices.

Those looking for specialized racing props, extreme high-performance tuning, or unusual hub configurations should look elsewhere; this prop is presented as a general-purpose OEM-dimension aftermarket replacement rather than a performance racing sling.

Pros & Cons

Pros

• Good fit with Mercury 30-70HP lower units thanks to the 13 spline tooth specification.
• Solid build quality and improved blade form contribute to noticeable rpm and speed improvements for some users.
• Easy to install, which makes it practical for DIY replacement during a weekend maintenance session.
• Cost-effective aftermarket alternative while keeping OEM diameter and pitch.

Cons

• As an aftermarket propeller, finish and fine tolerances may vary slightly from factory OEM parts.
• Not intended for specialized racing or extreme performance applications where custom blade geometry is required.

Specifications

Diameter	10 5/8in
Pitch	12in
Spline	13 spline tooth
Reference No	48-73134A45
Material	High quality aluminum
Compatible Engines	Mercury outboards 30-70HP

Our Verdict

The YOUNG MARINE aluminum outboard propeller is a sensible, well-made aftermarket replacement for Mercury 30-70HP owners who want OEM-matching diameter and pitch without paying OEM pricing. It offers reliable fit, decent build quality, and easy installation, making it good value for anglers and recreational boaters who need a straightforward, effective replacement propeller.

Frequently Asked Questions

Will this prop fit my Mercury 50HP four-stroke?
Yes, if your lower unit uses a 13 spline shaft and the engine is in the 30-70HP range this propeller is sized to match OEM diameter and pitch for those engines.

What material is the prop made from?
The propeller is made from high quality aluminum designed for everyday boating use with improved blade geometry.

Is this an OEM part?
It is an aftermarket propeller that matches the OEM diameter and pitch and is sold as a replacement with reference 48-73134A45.