25-60HP Yamaha Aluminum Propeller

Propeller selection is a critical factor in ensuring optimal performance for outboard engines ranging from 25 to 60HP. The table above provides an in-depth overview of compatible propeller models, highlighting essential specifications such as blade count, diameter, pitch, and rotation direction. This guide aims to interpret these specifications and help users make informed decisions tailored to their engine requirements.

Engine Applications and Compatibility

The propellers listed cater specifically to engines within the 25-60HP range. Notable applications include models such as the T25hp (2010 and newer), F30 (4-stroke, 2001-2005 and 2015-newer), and F60 (4-stroke, 1999 and newer). These engines utilize a 3-1/2” gearcase and are designed with 13 spline teeth and a thru-hub exhaust, ensuring compatibility with the propellers mentioned.

Key Specifications: Diameter, Pitch, and Blades

1. Blade Count (B):

   • Most propellers in the table feature three blades, offering a balanced compromise between speed and efficiency.
   • Four-blade options are also available, providing improved stability and better thrust at lower speeds.

2. Diameter (D):

   • Diameters range from 10 1/8 inches to 12 1/4 inches. Smaller diameters typically enhance higher RPM performance, making them suitable for lighter boats. Larger diameters, on the other hand, deliver better thrust for heavier vessels or applications requiring greater load capacity.

3. Pitch (P):

   • Pitch values range from as low as 9 inches to as high as 17 inches. A lower pitch propeller, such as the 9-inch option, is ideal for applications requiring maximum thrust at slower speeds. Conversely, higher pitch propellers, such as the 15-17 inch range, are designed for achieving greater top-end speeds.

Insights into Popular Models

• 6H5-45943-00-00:
  This 3-blade propeller with a diameter of 10 1/8 inches and a 15-inch pitch is ideal for lightweight boats aiming for higher speeds. Its right-hand rotation ensures compatibility with traditional engine setups.

• 663-45943-01-EL (3311-110-15):
  Featuring a diameter of 11 inches and a 15-inch pitch, this model balances speed and efficiency. Its left-hand (G) rotation makes it suitable for dual-engine configurations requiring counter-rotation capabilities.

• 663-45954-01-EL (3311-120-10):
  Designed with a diameter of 11 3/4 inches and a low 10-inch pitch, this propeller is perfect for vessels requiring high thrust at slower speeds, such as fishing boats or utility crafts.

• 4-Blade Options:
  The 4-blade propellers, with diameters between 10.1 and 10.6 inches, cater to boats needing enhanced grip and stability in turbulent waters. Their pitches, ranging from 11 to 15 inches, offer versatility for varied load and speed requirements.

Understanding Model Numbering

Each model number provides insights into its unique specifications. For instance, OEM numbers like 6H5-45945-00-00 indicate blade configuration, diameter, and pitch. Additionally, SOLAS part numbers, such as 3311-111-14, allow users to cross-reference and verify exact specifications for specific applications.

Conclusion: Tailoring Your Propeller Choice

Selecting the correct propeller is essential for maximizing engine efficiency, achieving desired performance, and ensuring the longevity of your equipment. By analyzing critical parameters such as blade count, diameter, pitch, and rotation direction, you can identify the model that best suits your specific needs. The information provided in the table serves as a reliable guide for making an informed decision, whether you prioritize speed, thrust, or stability.

For further assistance in propeller selection, consulting with a marine professional or contacting the manufacturer directly is always recommended.