Young Marine OEM Grade Aluminum Outboard Propeller 13 Spline

In this review of the Young Marine OEM Grade Aluminum Outboard Propeller, the bottom line is straightforward: this aftermarket propeller is for anglers and small-boat owners who need a reliable, cost-effective replacement for Mercury outboards with a 13 spline lower unit. The single biggest reason to buy is that it matches OEM diameter and pitch and uses high quality aluminum with improved blade design, delivering predictable performance without the OEM price premium. Our review focuses on fit, material quality, and everyday performance for 30 to 70 HP Mercury engines.

Key Features

• OEM fit: Diameter and pitch are identical to original Mercury spec, which helps ensure correct gearing and predictable handling when swapped in.
• 13 spline compatibility: Designed for 13 spline lower units so installation is straightforward on compatible 30-70 HP engines.
• High quality aluminum: The alloy construction balances corrosion resistance and durability for routine use in fresh and light saltwater environments.
• Improved blade design: Updated blade shape aims to maintain thrust and reduce cavitation for more consistent acceleration and cruising.
• Aftermarket value: Manufactured as an aftermarket propeller, it delivers OEM-like dimensions and performance at a lower cost.

Who It's For

This propeller is best for owners of Mercury 30, 35, 40, 45, 50, 55, 60, and 70 HP outboards who need a direct replacement with a 13 spline shaft. It suits recreational boaters, weekend anglers, and anyone who wants to restore original handling without custom tuning or re-pitching the propeller.

Those who should look elsewhere include owners who require stainless steel strength for heavy-duty use or racers seeking highly specialized blade geometry; also, verify spline count and engine compatibility before purchasing, as it is made specifically for 13 spline Mercury-style lower units.

Pros & Cons

Pros

• Direct OEM-matching diameter and pitch makes replacement simple and predictable.
• High quality aluminum construction provides a balance of corrosion resistance and affordability.
• Improved blade design helps with smoother thrust and reduced cavitation in everyday conditions.

Cons

• As an aftermarket propeller, it is not stainless steel and may not suit extremely demanding or collision-prone environments.

Specifications

Brand	Young Marine
Compatible Engines	Mercury outboard 30/35/40/45/50/55/60/70 HP
Spline Count	13 spline
Material	High quality aluminum
Design	Improved blade design, aftermarket OEM match
Type	Aftermarket propeller

Our Verdict

The Young Marine OEM Grade Aluminum Outboard Propeller is a practical, budget-conscious replacement for compatible Mercury engines that need a reliable 13 spline prop. It gives most recreational boaters OEM-equivalent dimensions and sensible blade improvements, making it a good value for routine boating and fishing use where stainless steel strength is not required.

Frequently Asked Questions

Will this propeller fit my Mercury outboard?
It fits Mercury outboards that use a 13 spline lower unit and are within the listed HP range; verify your engine spline count before ordering.

Is the material suitable for saltwater use?
The propeller is made from high quality aluminum, which performs well for general saltwater use but benefits from regular rinsing and inspection.

Is this an OEM part?
This is an aftermarket propeller designed to match OEM diameter and pitch, offering a lower-cost replacement with similar performance.