48-816704A40 48-816704A45 Mercury Black Max 10 1/2 x 13 Aluminium Propeller – RH 13 Spline | Genuine Used Part

🔧 Product Description

Genuine Mercury Black Max 10 1/2 x 13 Large-Blade Aluminium Propeller - Part Number: 48-816704A40 / 48-816704A45

A genuine used Mercury Black Max three-blade right-hand aluminium propeller for selected 25HP-60HP outboards using the 13-spline standard gearcase.

This model uses a large blade area for stronger grip and load carrying than the standard 13-pitch propeller family. The later A45 version uses the Flo-Torq Reflex hub system, while the earlier A40 version uses the original rubber-hub hardware.

⚙️ Key Features

• Genuine Mercury / Quicksilver Black Max propeller
• 10 1/2-inch diameter x 13-inch pitch
• Three-blade aluminium construction
• Right-hand rotation with 13-tooth shaft application
• Large-blade-area design for load carrying and acceleration

🚤 Compatibility

Commonly used on

• Mercury and Mariner 25HP-60HP outboards with 13-tooth standard gearcases
• Pontoon, workboat and heavy-load applications requiring a large blade area

Typically suits

• Engine models:
• Mercury / Mariner 25HP BigFoot or Command Thrust four-stroke
• Mercury / Mariner 30HP two-stroke
• Mercury / Mariner 30HP BigFoot or Command Thrust - 2010 onward
• Mercury / Mariner 30HP four-stroke - 1994-2005
• Mercury / Mariner 30HP-40HP SeaPro / Marathon
• Mercury / Mariner 40HP, 45HP, 50HP, 55HP and 60HP two-stroke and four-stroke standard gearcase - 1977 onward
• Mercury / Mariner 55HP SeaPro / Marathon
• Excludes 40HP-60HP BigFoot / Command Thrust models using the larger 15-spline gearcase
• HP Range: 25HP - 60HP
• Engine Type: Mercury / Mariner two-stroke and four-stroke outboard with 13-spline standard gearcase
• Year Range: Approximately 1977 onward, model and gearcase controlled

🔌 Function

The propeller converts engine torque into thrust. Its 13-inch pitch and increased blade area support strong acceleration, planing and grip under heavier boat loads.

⚠️ Common Signs of Failure

• Blades are bent, chipped, cracked or out of track
• The rubber hub slips and engine RPM rises without matching boat speed
• Propeller vibration increases with engine speed
• Cavitation, ventilation or poor acceleration develops after impact damage
• Hub splines, thrust faces or retaining surfaces are worn or corroded

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 48-816704A45 → Supersedes 48-816704A40

OEM / Related Numbers

• 48-816704A40
• 48-816704A45
• 825257Q12 later Flo-Torq Reflex hub kit
• 8M0047148 related Reflex sleeve
• 48-855858A46 related 10 1/2 x 13 Vengeance stainless-steel alternative

Aftermarket / Verified Equivalents

• Michigan Wheel Match: 031057 - 10 1/2 x 13 aluminium equivalent
• Quicksilver Black Diamond: QA2076X - 10 1/2 x 13 aluminium equivalent
• Ozpropeller / BS.PRO direct 10 1/2 x 13 aluminium replacements
• Mercury Vengeance: 48-855858A46 - OEM stainless-steel performance alternative

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated