YOUNG PROPS Stainless Boat Propeller 10.5 x 13 for Mercury 30–70HP, 13‑Tooth Right Rotation

YOUNG PROPS 10 1/2 x 13 stainless-steel propeller is a direct-replacement, three-blade right-rotation prop designed for Mercury outboard engines rated 30–70 HP with a 13-tooth splined hub.

This precision-machined propeller combines durable stainless steel construction with a 10.5-inch diameter and 13-inch pitch to deliver reliable performance for recreational boats. Built to match OEM reference 48-816704A45 and crafted for corrosion resistance, it serves as a practical upgrade or replacement for Mercury outboards within the 30–70 HP range. The three-blade, right-rotation design balances thrust and fuel efficiency for common planning and cruising conditions.

Will this propeller fit my Mercury 30–70 HP outboard?

If your engine uses the common 13-tooth splined hub and accepts a 10 1/2" x 13" three-blade right-rotation prop, this YOUNG PROPS unit is compatible. Always verify engine model and year against the OEM reference number and your current propeller’s tooth count before purchasing.

• OEM reference compatibility: 48-816704A45
• Intended range: Mercury outboards 30–70 HP
• Hub type: 13-tooth splined connection
• Rotation and blades: right rotation, 3 blades

How does the 10 1/2 x 13 size affect boat performance?

Diameter and pitch together determine acceleration, top speed, and engine load. The 10.5" diameter with 13" pitch provides a middle-ground setup that favors steady acceleration and efficient cruising for small to medium displacement boats.

• 10.5" diameter: good thrust and handling at lower speeds
• 13" pitch: balanced top-end speed without overloading the motor
• Three blades: stable performance and responsive steering

What materials and build details matter for durability?

This propeller is formed from polished high-quality stainless steel for strength and resistance to both saltwater and freshwater corrosion. The metal construction helps resist dents and deformation better than aluminum, making it a practical choice for frequent boaters or harsher conditions.

• Material: premium stainless steel for long service life
• Finish: polished surface for smoother water flow and corrosion protection
• Construction: precision-machined blades for consistent thrust

How easy is installation and maintenance?

YOUNG PROPS designed this propeller as a drop-in replacement to make swap-outs straightforward. The unit is removable and installs with standard tools; regular rinsing and inspection will keep it performing well season after season.

• Installation: direct replacement, fits existing splined hub
• Tools: common prop tools required (nut, cotter pin, wrench)
• Care: rinse after saltwater use and check for nicks or alignment

Who is this for: Boat owners with Mercury outboards in the 30–70 HP range seeking a durable, OEM-referenced stainless-steel propeller that balances acceleration and cruising speed. It's appropriate for anglers, family cruisers, and owners looking to replace a damaged blade or upgrade from aluminum for improved longevity and performance.