Finding the correct propeller for you boat is easy with our Prop Guide.

What is the best prop pitch for my boat. Personally running larger boats close to the 30-foot range or higher calls for a 4 blade as its best for the size and weight of the boat. The higher the speed of the boat the higher the pitch should be. This directly influences performance.

Select the year of your marine engine. So if you are going to be changing the propeller on your recreational boat and decide to go from a 21 pitch prop to a 19 pitch prop you will be essentially increasing the engine rpm by around 400 revolutions. The first place to look is the prop.

The calculator will automatically compute the 5 th variable. Also the higher the pitch the greater the efficiency of the propeller. A lower pitched propeller will create more power due to more engine RPMs but the boat will move slower.

When choosing a propeller choose a pitch that will keep the engine RPM in its recommended operating range. Two other design features include Rake and CupThese elements are not labeled on the propeller. A higher pitched prop allows the boat to move faster by travelling a farther distance with each rotation.

What Considerations Do You Need to Make. The first number is the Diameter width of the circle of the blades and the second is the Pitch theoretical travel distance of the angled blades in one revolution. This distance is the screws pitch.

Okaynow that we have a mental picture of pitch lets apply it to boat propellers. Select the HP for your marine engine. A prop with too much pitch may deliver more top speed because the prop moves further forward with each rotation but acceleration may be poor and the boat will struggle to get on plane.