Description
Mercury 77348A45 Black Max Propeller — 12.75″ × 21″ RH Aluminum 3-Blade
The Mercury Black Max 77348A45 propeller offers dependable all-around performance and value for a wide range of Mercury and Mariner outboards. Crafted from Mercury’s exclusive Mercalloy aluminum alloy, this 12.75″ × 21″ right-hand prop delivers strength, flexibility, and smooth operation. The included Flo-Torq II hub kit protects your drivetrain from impact stress, while the Phantom Black enamel finish resists corrosion for long-term durability in fresh or saltwater.
Applications
For use on Mercury and Mariner 40–60HP BigFoot/Command Thrust (all years) and 75–125HP (1978 and newer) outboards. Always confirm propeller dimensions, hub type, and rotation in your owner’s or service manual before installation.
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: 77348A45
- Brand: Mercury Propeller
- Category: Propellers
- Subcategory: Black Max
- UPC: 745061018495
- Country of Origin: United States
- Diameter × Pitch: 12.75″ × 21″
- Rotation: Right Hand (RH)
- Blades: 3
- Material: Mercalloy Aluminum
- Hub System: Flo-Torq II (835257K1)
- Finish: Phantom Black Gloss Enamel
- Engine Fit: Mercury / Mariner 40–125HP Outboards
- Package Length: 17″
- Package Width: 16.55″
- Package Height: 7″
- Package Weight: 7.05 lb
- Prop 65 Code: Cancer and Reproductive Harm
What’s Included
- 1 × Mercury Black Max Propeller — 77348A45 (12.75″ × 21″ RH, 3-Blade Aluminum)
- 1 × Flo-Torq II Hub Kit (835257K1)
Service Notes
- Install using the included Flo-Torq II hub kit for proper fit and drivetrain protection.
- Inspect propeller, thrust washer, and nut for wear or corrosion before installation.
- Verify correct WOT RPM range and torque settings using Mercury service specifications after installation.