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3-Blade vs. 4-Blade Mercury Propellers.    
3-Blades
3-blade Mercury props are great on most boats as they offer good all around performance, better efficiency, and can achieve higher speeds. Switching from 4 to 3-blades generally requires a 1" pitch increase.
3-Blade vs. 4-Blade
4-Blades
4-blade Mercury props work well with bass, pontoon & high performance boats as they provide better acceleration, keep a boat on plane with fewer RPM's, and produce less vibration at high speeds. Switching from 3 to 4-blades generally requires a 1" pitch decrease.

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Aluminum vs. Stainless Steel Mercury Propellers.    
Aluminum
Aluminum Mercury props are a great choice for small and medium sized boats. They are inexpensive and under normal conditions can last for many years. When running your boat in an area where striking the bottom is likely, aluminum blades can flex, helping prevent damage to your engine.
Aluminum vs. Stainless Steel
Stainless Steel
Stainless steel Mercury props are ideal for large or heavy boats and boats running in saltwater. Although more expensive than aluminum, stainless steel Mercury props are more durable and will last longer. When running your boat at speeds over 50 mph, stainless Mercury props will perform better than aluminum.

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Differences in Propeller Diameter.    
Diameter is the width of the circle that the Mercury prop would make when rotating.

Prop diameter does not affect the fit of the prop on a boat.

The diameter of your Mercury prop can vary by up to 1/2" with no discernable change in performance.

Caution: Before increasing the diameter of your Mercury prop, make sure there will be enough clearance between the blades and cavitation plate or anode on your engine.
Propeller Diameter

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Pitch: Diameter: Differences in Diameter
Material: Stainless vs. Aluminum Blades: 3-Blade vs. 4-Blade
Your Engine:
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The below propeller brands will fit on your selected Mercury engine. However, to ensure proper loading of your engine, please choose the propeller size that most correctly matches your existing propeller. Please use the engine filter above to narrow your Mercury propeller options to your specific engine. Please CLICK on the below brands to see the list of products associated to that brand.