Just like with anything else, there are many options for boat propellers on the market. It is crucial that you look for one that fits both your budget and your needs. Besides the obvious consideration of horsepower, there are other things that you must think about before making a purchase. Make sure that you are informed, as this will save you time in finding the right boat props.
Plastic boat props usually are made for emergencies, so these would not make for a good primary motor. If you maintain them well, aluminum props are a great, inexpensive choice. They are long-lasting, as they typically last for several seasons. The most expensive option of all are stainless steel props. However, they can be ideal for their greater thrust efficient from rigid blades, strength and durability. You truly will get what you pay for when it comes to boat props. Stainless props are king when it comes to performance.
Determine the pitch that you will need. You will find that the props are classified by the designation of diameter x pitch. Diameter is the size of the propeller as measured from the blade tip to another blade tip. Pitch is measured as the distance that the propeller travels with one propeller revolution.
Carefully consider the pitch when you are buying your motor. The motor that you should buy largely will depend on the purpose for your boat and the type of boat that you have. Since props operate in only one gear, you can achieve a balance with acceleration and speed by choosing the right pitch. If you already have a prop, cruise at full throttle to test out the pitch. Watch your RPM red line to determine whether your prop is the right size. The RPMs should be leveled out at about 100-200 below the maximum limit.
Once you have found out about your current prop, you should be able to find the right pitch by comparing it to your current one. The general rule is that with each inch of pitch change, there is around 150-200 RPM difference. For higher RPMs, it is necessary to buy a prop with a lower pitch. Conversely, if you need less RPMs, buy one that has a higher pitch. After you have a rough idea of what you are looking for, look online or talk to a retailer. It should not be difficult to choose a prop for the type of boating that you will be doing.