B series Propellers

Plastic/ Aluminium Series Propellers Although Plastic/aluminium is the lowest-cost option for most engines, these Yamaha propellers provide better performance than other plastic/aluminium propellers because of their precise matching to Yamaha engines. The light weight and lower cost also makes aluminium propellers an excellent choice as a spare propeller, in case striking an underwater object accidentally damages the primary propeller.

Propellers - Some Basic Facts!!

Pitch: Using the analogy of any screw that advances through a solid substance(such as wood) the distance the screw would have travelled forward after one complete revolution is measured in inches and known as the pitch.

Effects of Diameter and Pitch: Propellers with larger diameters and smaller pitches are used for boats where the requirement is for lower speed but maximum power though the water. Conversely, a higher speed planing boat would use a smaller diameter of larger pitch .

Blade Rake: This is an angle at which the blade is attached to the propeller hub. An increased blade rake will improve the performance of engines with a higher elevation or in situations where ventilating and controlled cavitation occur.