Description

Mercury MerCruiser Quicksilver 816706A45 is a genuine Black Max aluminum propeller in a 10.4″ diameter x 14″ pitch, right-hand rotation, 3-blade configuration. Mercury positions the Black Max family as its versatile, value-focused aluminum prop line, built from patented Mercalloy for durability and good all-around performance. Current part-specific references for 816706A45 identify it as the 10.4 x 14 RH version for mid-range Mercury/Mariner outboards.

Key Features

• Genuine Mercury Black Max propeller, part number 816706A45.
• 10.4″ diameter x 14″ pitch, right-hand rotation.
• 3-blade aluminum construction for dependable everyday performance.
• Built from Mercury’s patented Mercalloy alloy for strength with enough ductility to handle minor impacts.
• Current part-specific listings show it commonly supplied with Flo-Torq Reflex hub kit 835257K12.
• Mercury describes Black Max as a strong general-purpose choice for boats up to 250 HP and speeds under 50 MPH.

Engine Compatibility

Current part-specific references commonly associate 816706A45 with Mercury/Mariner 25-30 HP BigFoot / Command Thrust FourStroke, 30 HP TwoStroke, 30 HP FourStroke (1994-2005), 30-40 HP SeaPro / Marathon, 40-60 HP outboards, and 55 HP SeaPro / Marathon applications. The strongest supportable match is by prop shaft spline, hub kit, and current prop setup rather than by horsepower alone.

Serial Number Fitment Notice

Verify fitment by engine serial number, gearcase, prop shaft spline, and hub system before ordering. With 816706A45, matching the exact 10.4 x 14 RH Black Max setup and the correct Flo-Torq Reflex hub hardware is the important check, especially when several Mercury props share similar dimensions across different outboards.

When This Part Needs Replacement

Replace the propeller when blades are bent, chipped, cracked, badly worn, or when the current prop no longer delivers the right RPM and load performance for the boat. Because Black Max is Mercury’s practical all-around aluminum prop family, it is a common replacement choice when you want OEM-style fit, dependable cruising, and easy serviceability.

Installation Notes

Confirm the correct Flo-Torq Reflex hub kit 835257K12 and prop hardware before installation. Current Mercury hub documentation shows this hub family is used on a wide range of 25-60 HP applications, and current 816706A45 listings tie this prop specifically to that hub setup. After installation, prop choice should still be checked against the engine’s recommended WOT RPM range under normal boat load.

Alternate/Superseded Part Numbers

Current distributor references show 816706A40 and FPM739 as earlier or related superseded references connected to 816706A45.

Parts Desk Insight

The easy mistake with this prop is ordering by pitch alone. For 816706A45, the better match is 10.4 x 14 RH + Black Max family + correct Flo-Torq Reflex hub + exact gearcase application, because that combination matters more than the size stamp by itself when you want the boat to run properly.

Shipping: Ships same or next day for fast Canada wide shipping.