48-73132A4 48-73132A45 Mercury Black Max 11 1/4 x 10 Aluminium Propeller – RH 13 Spline | Genuine Used Part

🔧 Product Description

Genuine Mercury Black Max 11 1/4 x 10 Aluminium Propeller - Part Number: 48-73132A4 / 48-73132A45

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

The low 10-inch pitch and relatively large blade area provide strong acceleration and load carrying for pontoons, workboats and heavily loaded hulls. Earlier A4 rubber-hub propellers use different hardware from the later Flo-Torq Reflex A45 version.

⚙️ Key Features

• Genuine Mercury / Quicksilver Black Max propeller
• 11 1/4-inch diameter x 10-inch pitch
• Three-blade aluminium construction
• Right-hand rotation with 13-tooth shaft application
• Later A45 version uses the Flo-Torq Reflex hub system

🚤 Compatibility

Commonly used on

• Mercury and Mariner 25HP-60HP outboards with the 13-tooth standard gearcase
• Applications requiring a low-pitch, high-load aluminium propeller

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 10-inch pitch helps the engine accelerate a heavy load and reach the recommended wide-open-throttle RPM where a higher-pitch propeller would overload the engine.

⚠️ 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

• 48-73132A45 → Replaces 48-73132A40 and 48-73132A4
• 48-73132A4 earlier pressed-rubber-hub propeller reference

OEM / Related Numbers

• 48-73132A4
• 48-73132A40
• 48-73132A45
• 825257Q12 later Flo-Torq Reflex hub kit
• 8M0047148 related Reflex sleeve
• 11-31990Q02 hardware kit for earlier rubber-hub propellers

Aftermarket / Verified Equivalents

• Michigan Wheel: 033094, 033093, 033088, 032045, 032044 and 031015 cross-reference families
• VEVOR / RHINK direct 11 1/4 x 10 aluminium replacements for 48-73132A45
• Quicksilver Black Diamond 10-pitch aluminium functional alternative with the correct 13-spline hub

📦 Condition

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