Genuine Mercury Black Max 13x19 RH Propeller 48-77346A45 Flo-Torq II
48-77346A45
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Genuine Mercury Black Max 13 x 19 Propeller
Right-hand aluminium 3-blade propeller with Flo-Torq II hub kit
Genuine Mercury Black Max propeller, part 48-77346A45, with 13-inch diameter, 19-inch pitch and standard right-hand rotation. Supplied with the Mercury Flo-Torq II hub kit specified for this propeller.
Key Features
- Genuine Mercury / Quicksilver propeller
- 13 in diameter x 19 in pitch
- Three-blade aluminium construction
- Right-hand / standard rotation
- 15-spline Flo-Torq II hub system
- Flo-Torq II hub kit 835257K1 supplied
Technical Specs
| Diameter | 13 in |
| Pitch | 19 in |
| Rotation | Right hand / standard |
| Blades | 3 |
| Material | Mercalloy aluminium |
| Gearcase family | 4.25 in, application dependent |
| OEM part | 48-77346A45 |
Compatibility / Fitment Guide
| Application | Verified fitment | Checks / exclusions |
|---|---|---|
| Mercury / Mariner 40–60 HP BigFoot / Command Thrust | All-year families using the compatible 4.25-in gearcase and Flo-Torq II interface | Standard small-gearcase 40–60 HP models may differ |
| Mercury / Mariner 75–125 HP | Selected 1978-on outboards with compatible 4.25-in gearcase | Check spline and hub hardware |
| Other 40–140 HP claims | Do not rely on horsepower alone | Gearcase diameter, spline and approved prop chart must match |
| Counter-rotation gearcases | Not suitable | This is right-hand rotation |
| High-altitude, heavy-load or tow use | Physical fit may be correct but 19-in pitch may be unsuitable | Select pitch from current WOT rpm and boat load |
Before ordering: Confirm current propeller size, gearcase, spline count, rotation and engine WOT rpm specification. A 19-pitch propeller is not automatically correct because it physically fits.
Part Number Cross Reference
| Mercury / Quicksilver propeller | 48-77346A45 |
| Flo-Torq II hub kit | 835257K1 |
| Description code | Black Max 13R19 RH |
| 4Boats SKU | 48-77346A45 |
Frequently Asked Questions
Is this genuine Mercury?
Yes. The product is listed as a genuine Mercury Black Max propeller.
Does the hub kit come with it?
Yes, the specified configuration includes Flo-Torq II hub kit 835257K1.
Will it fit every Mercury 40–125 HP engine?
No. Confirm 4.25-inch gearcase, spline/interface and the engine propeller chart.
How do I know whether 19-inch pitch is correct?
Compare the current propeller and measured full-load WOT rpm with Mercury's recommended rpm range.
Installation note: Use the correct thrust washer and hub components in the specified order, torque the prop nut to Mercury's procedure and recheck after initial use. Remove the ignition key and isolate the engine before handling the propeller.
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