Step 1 - Boat Type.

What's the best prop for my boat. How to Use Our Prop Guide. Five blade propellers are good for rough water conditions and tow sports. A four blade propeller will improve handling and control for high-performance applications.

The Mercury 115 outboard is a motor that runs well with an aluminum or stainless steel propeller. Finally material is an important consideration for your propeller. Acceleration is achieved by increasing the rotation speed which usually means a smaller diameter propeller.

Please choose the type of boat below that corresponds most closely with your boat type. 1 use the Mercury Prop Slip Calculator or 2 if you know the top speed of your boat enter the RPMs Pitch and Gear Ratio in the Boat Speed Calculator tool and vary the slip value until the estimated speed is correct. Well help you find or build the Cobalt Boat of your dreams call us today to get started.

Aluminum propellers are easy to repair and are most common today. Boat performance is equal parts power and propeller. For example I have a boat with a max RPM of 5800 my propeller pitch is 24 and the gear ratio is 192.

You can find this in your operators manual expressed in terms of a certain horsepower at a certain rpm. 1 Find a Replacement by OEM Part Number. I get asked for that kind of propeller three or four times a day said Jeff Johnston of Hering Propellers one of the top names in the go-fast boat propeller manufacturing game based in Marysville Wash.

In 5 steps or less. There is no single propeller choice that is the best for top speed midrange acceleration and hole shot. Ad Hall of Fame boat dealer with a full line of Cobalt Boats offering salesservice storage.