How to Choose a Boat Propeller
The propeller is a small part of your boat, but it is one of the most important components of the propulsion system. It is also one of the most overlooked parts. Without the right propeller, you will not get the boat moving correctly. There are several key aspects to choosing the best propeller for your boat. Making the right determinations on use and boating styles allows you to select the right blade types and sizes, so that you get the performance you desire from your boat.
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Instructions
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Match up your old propeller to get a similar pitch and size. If you like the way your boat performs, don't rock the boat with a new set-up that might not work as well.
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Get more performance with a bigger size propeller, or with one that has more blades. Boat propellers come in various sizes, and in 3-blade and 4-blade styles. Both have useful applications, depending on how and where you boat.
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Check your boat's engine manual for the maximum horsepower recommended. Never exceed that amount. The bigger the circumference of the prop blades, the more thrust is provided with each revolution; this equates to the horsepower you get. In some cases, you will not know what the effect of any propeller is until you use it on your boat. Warm up the engine and head out. Run it at WOT (wide-open throttle) and make sure you do not exceed the top RPM.
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Determine your use preferences. For most general boaters who do a little fishing, a little water play and a little cruising, a good 3-blade propeller is the best choice. It gives a lot of power on the top for high speeds, but is a little slower to get out of the water than a 4-blade propeller. However, 3-blade propellers are easier to find and come in a larger selection of sizes. For dedicated water sports boaters, a 4-blade propeller gives the best performance. You lose some top end speed, but you can get the boat up and on plane faster.
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Choose between aluminum or steel: Steel is very durable and stands up to a little bit of beating. However, it is expensive, so many beginning boaters avoid paying so much for a propeller that they may end up destroying. If you feel comfortable with your abilities and think you can spare your propeller undue damage, a steel propeller is a good investment. The stronger material also helps you get more speed out of your boat. In saltwater situations, steel is advisable because it can stand up to corrosion better than aluminum. In fresh water, there is less concern for corrosion, and the aluminum, light-weight propeller is a popular choice.
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Tips & Warnings
Have a damaged existing propeller repaired. It is much cheaper than a brand new one. If you badly damage the propeller, but it is still salvageable, buy a new one and use the repaired propeller as a spare for emergencies. Having a serviceable, if not excellent, propeller on board when disaster strikes is smart preparation.
References
- Photo Credit boat image by pearlguy from Fotolia.com
