Sometimes the choice is made by availability, and others by preference. The purchase cost of a nibral inboard propeller will be higher than bronze, as will repair work you may need done in the future. Some boaters also report greater longevity with nibral when they are running high horsepower motors, or logging a lot of hours with less extensive maintenance repair required. We generally recommend nibral specifically when a prop is considered “over square,” which is when the pitch is greater than the diameter. While the two look very much alike, nibral is considered harder, stronger and more corrosion resistant. Either material is suitable in many inboard propeller applications. In the realm of inboard propellers and ski wheels, we primarily see products made of Manganese Bronze VS NiBrAl which is an alloy blend with nickel, bronze, and aluminum. Should I choose bronze or nibral?Įxcellent question. In some cases, companies who work exclusively with nibral do not stamp the material on the hub of the propeller, and we find out when our prop-tech gets his hands on the project. It’s not always visible when a propeller is pulled off a boat and has growth or electrolysis, but once our prop-tech gets them all cleaned up, markings become visible. Most of the time, a nibral boat propeller will be stamped somewhere on the hub indicating the metal type. Some propeller brands work exclusively in Nibral including Acme and OJ, whos ski wheels we stock. How can you tell the difference between bronze VS nibral? a 13' x 12' three-bladed bronze prop through a direct drive. In accordance with those features, nibral does generally cost more and take longer to work on in the machine or repair shop. MasterCraft uses Nibral for its underwater gear. Blade 125.00 17.10 shipping or Best Offer vintage brass bronze boat ship propeller 4 blade. Nibral has a tensile strength of 90,000 PSI, and a yield strength of 37,000. If youre looking for a discount Nibral inboard boat prop. To get technical, Manganese Bronze Alloy has a tensile strength of 65,000 PSI, and yield strength of 25,000 PSI. In the realm of inboard propellers and ski wheels, we primarily see products made of Manganese Bronze VS NiBrAl which is an alloy blend with nickel, bronze, and aluminum. What is NiBrAl? And how is it different from bronze? Inboard Propeller Reducer Bushing Reduce the propeller bore to fit smaller shaft.MICHIGAN Sailboat Propellers - 2-Blade Propellers.75-150 HP Mercury 4-1/4" Gearcase 15 Tooth Spline.75-140 HP Single Exhaust 15 Tooth Spline.However, they are also more durable and will last longer. In general, Nibral propellers are more expensive than bronze propellers. However, they are more expensive and slightly heavier than bronze propellers. 150-300 HP Evinrude E-TEC G2 15 Tooth Spline They are stronger, more corrosion-resistant, and can provide excellent performance.90, 115 & 140 HP Johnson 15 Tooth Spline.
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