Making the decision between a 3 blade propeller and a 4 blade propeller comes down to a few basic features and the performance you need from your boat prop.
Benefits of a 3 Blade Propeller
- Slightly more top end speed (compared to a 4 blade)
- More styles and pitch options typically available
- Often less expensive than a similar 4 bladed prop
Benefits of a 4 Blade Propeller
- Helps you get out of the hole faster
- Smoother operation and more efficient at mid-range engine speeds
While 3 bladed boat propellers are the most common, boaters often switch to a 4 bladed prop if they are looking for smoother acceleration and a faster hole shot to improve performance as a water sports tow boat. Since 4 blade propellers have more blade surface than a similar 3 blade propeller, they will move more water, but they will also have more drag and be harder for the motor to turn. The drag can impact top end speed, lowering it by a few miles per hour.
If you’ve done a Wide Open Throttle Test with a 3 blade propeller and your RPMs are in the recommended operating range, you will probably want to drop your pitch by 1″ to 2″ to keep the engine turning in the same RPM range. Since the engine has to push more blade surface through the water, RPMs will be reduced, but by lowering the pitch, RPMs will be gained, offsetting the difference.
To learn more, see our article Boat Propellers | 3 blade or 4 blade? in our Boat Propeller Resource Center.
We offer a great selection of 3 and 4 blade models of boat propellers for outboards as well as propellers for stern drives. We feature Solas Propellers, PowerTech and Mercury QuickSilver props. Email or call us at 866-560-1330 if you have questions or need help selecting your next boat prop. We’re always happy to help.
















