Mercury Enertia doesn't break the laws of physics – it rewrites them.
Mercury Propellers – the world leader in propeller technology – launched a new line of propellers called Enertia. Using exclusive Mercury technology, the propeller improves the acceleration and top speed of many outboard- and sterndrive-powered boats.
The first of the Enertia range, available in Europe by mid-2006, will be for use on Mercury and Mariner Verado, OptiMax and their other outboards rated at 135HP (101kW) and higher.
Enertia is cast from Mercury's patent-pending X7 alloy. According to Mercury engineers, it's four times more durable and 30 percent stronger than conventional stainless steels, which completely changed the previously accepted rules of propeller geometry. This ‘clean-slate' thought process resulted in a prop with thinner blades and higher rake angles, creating unprecedented efficiency in all ranges of operation. 
The X7 alloy is exclusive to Mercury, so no other propeller company can copy Enertia's groundbreaking design without seriously compromising durability.
Improving hole shot and top speed with the same propeller is virtually unheard of in the marine industry – typically, if a prop change improved acceleration, it would diminish top speed, and vice versa. Because the strength of X7 allows for thinner blades, Enertia can provide gains in both acceleration and top speed.
“This is the ultimate offshore propeller,” said Kevin Fletcher, product manager for Mercury Propellers. “Propeller selection for heavy, single- and dual-engine boats has always been a dilemma of acceleration versus top speed, but Enertia helps eliminate the compromise. Plus it typically stays hooked up better in the corners and allows for lower planing speeds. “
“It varies by application, but lower planing speed translates into increases in range and peak fuel efficiency.”
Mercury recently tested Enertia on a 24-foot center-console boat powered by a 250 Mercury Verado engine. Compared to a conventional stainless steel prop, the same pitch Enertia improved the boat's acceleration time by more than 20 percent from 0 to 20 mph and 0 to 30 mph. The top speed also improved by two miles per hour.
"It's like adding an additional 30 horsepower in that application,” Fletcher said.