Propeller Basics - Cupping
Cupping
 Many of today's propellers incorporate a cup at the trailing edge of the propeller blade. This curved lip on the propeller allows it to get a better bite on the water. This results in reduced ventilation, slipping, and allows for a better hole shot in many cases. A cupped propeller also works very well where the motor can be trimmed so that the propeller is near the surface of the water. The cup will typically result in higher top end speed on one of these applications.
The curved lip on the propeller or cup helps the propeller get a better bite on the water.
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P is for Propeller Propeller Basics
How To Choose A Prop
Diameter Pitch
Cupping Rake
Ventilation Cavitation

We tell you everything you need to know about props from cupping to ventilation.

 		Learn About Prop Characteristics Prop Characteristics
3 Blades VS. 4
Left-Handed Props
Performance
Exhaust
Aluminum vs. Stainless Steel

If you want to modify your boat's performance, consider the above before making your selection. 		Learn About Engine RPM Determining RPM's
Effect of pitch on RPM
Test for Maximum RPM


For safety and efficient performance, it is critical that your engine operates within the RPM range recommended by the manufacturer.