BLACK MAX MERCURY 3-Blade Propeller, 25 to 70Cv 73136A45

BLACK MAX 3-blade propeller for Mercury 25 to 70 CV engines with 13 splines

This propeller, equipped with the included Flo-Torq hub system, delivers excellent performance.

Engine compatibility:

This propeller is compatible with the following Mercury outboard models:

• 25 and 30 CV 4-stroke carburetor engines with BigFoot and Command Thrust mounting bases
• 30 and 40 CV 4-stroke EFI 3-cylinder
• 40, 50, 60CV 4-stroke 4-cylinder engines with standard mount (not BigFoot/CT)
• 30, 40, 50, 55, and 60CV 2-stroke
• 70CV older 2-stroke models
• Not suitable for TOHATSU-based engines with serial numbers of the 0Rxxxxxx and 1Rxxxxxx type

Dimensions: Find the propeller configuration that fits your boat

Select the size that matches your engine power and configuration.
The diameter and pitch directly affect your propulsion performance.

Standard sizes:

• 12-1/2 x 8 inches – part number 42738A45
• 12-1/4 x 9 inches – part number 87818A45
• 11-1/4 x 10 inches – part number 73132A45
• 10-7/8 x 11 inches – part number 85632A45
• 10-5/8 x 12 inches – part number 73134A45
• 10-3/8 x 13 inches – part number 73136A45, 8M0131958
• 10-1/4 x 14 inches – part number 73138A45
• 10-1/8 x 15 inches – part number 73140A45
• 10 x 16 inches – part number 73142A45

Special sizes with wide blades (upon request):

• 12 x 10-1/2 inches – part number 42740A45
• 10-3/4 x 12 inches – part number 816702A45
• 10-1/2 x 13 inches – part number 816704A45
• 10-3/8 x 14 inches – part number 816706A45

Flo-Torq Hub System: Stability and Reliability

Equipped with the Flo-Torq Reflex 835257Q12 hub system—exclusive Mercury technology that absorbs vibrations and eliminates clutch chatter. For a smoother, more comfortable boating experience on your boat.

Which propeller is best for a 50CV Mercury engine?

The choice of propeller depends primarily on the type of boat and how you use it (recreational boating, fishing, water sports) as well as water conditions (calm, rough seas, depth). For a 50 CV Mercury engine, a 10-1/4 x 14 propeller is often recommended to achieve a good balance between top speed and low-RPM torque.

For example, for towable water sports, a propeller with a lower pitch (13) provides better acceleration and increased maneuverability. On the other hand, for long-distance trips where speed is important, a higher pitch (15 or 16) allows you to take full advantage of the engine’s power and reach higher speeds.

It is also advisable to check the type of hub to ensure you know the number of splines.