Description
Mercury 73138A45 Black Max Propeller — 10.25″ × 14″ RH Aluminum
The Mercury Black Max 73138A45 propeller is engineered for reliable performance and lasting durability. Made from Mercury’s proprietary Mercalloy aluminum alloy, it offers strength and flexibility to handle minor impacts. The Flo-Torq Reflex hub system absorbs vibration and protects the drivetrain, while the Phantom Black enamel finish delivers corrosion resistance and classic Mercury styling.
Applications
Fits select Mercury/Mariner 25 HP Bigfoot/Command Thrust through 60 HP outboards with 13-spline propshaft, including 30 HP TwoStroke, 30 HP Bigfoot/Command Thrust, 30–40 HP SeaPro/Marathon, 30 HP FourStroke 1994–2005, 40–60 HP standard gearcase outboards 1977 and newer, and SeaPro/Marathon 55 HP. Always confirm fitment and installation procedures in your owner’s or service manual.
Shipping & Returns
Fast processing and shipping from our marine parts warehouse. 30-day returns on unopened, unused items. Review our Refund Policy for full details.
Key Facts
- BU Part ID: 73138A45
- Brand: Mercury Propeller
- Category: Propellers
- Subcategory: Black Max
- UPC: 745061018365
- Country of Origin: United States
- Diameter × Pitch: 10.25″ × 14″
- Rotation: Right Hand (RH)
- Blades: 3
- Material: Mercalloy Aluminum
- Finish: Phantom Black Gloss Enamel
- Hub System: Flo-Torq Reflex
- Engine Fit: Mercury / Mariner 25–60HP Outboards
- Package Length: 11.9″
- Package Width: 10.9″
- Package Height: 5.85″
- Package Weight: 4.01 lb
- Prop 65 Code: Cancer
What’s Included
- 1 × Mercury Black Max 3-Blade Aluminum Propeller (73138A45)
- 1 × Flo-Torq Reflex Hub Kit (835257K12)
Service Notes
- Inspect propeller and hub before each use for cracks or wear.
- Use only the recommended Flo-Torq Reflex hub for proper fit and vibration control.
- Confirm torque specifications and hardware from your Mercury service manual.

