Simplicity Marine Drives are an alternative to
the high maintenance and power stealing stern drives available to the marine buyer today.
They were developed with the purpose to making the propulsion system faster, simpler and
easier to MAINTAIN, thus being more DEPENDABLE. The name Simplicity was chosen for what
the dictionary calls freedom from complexity. The drives are constructed of stainless
steel, manganese bronze and Bi-Axial fiber-glass composites to combat the harsh underwater
environment. The propeller shaft and rudder are the only two moving parts in the drive.
Since 1986 Simplicity Marine Drives have proven their reliability operating on
pleasure, commercial and government applications around the world.
Simplicity Marine Drives work with only two moving parts, the propeller shaft (which holds
the propeller) and the rudder. They achieves maximum output and efficiency using fixed
Surface-Piercing design, where only the propeller and rudder come in contact with the
water at planing speeds. This greatly reduces the underwater appendage drag, improves
speed, fuel economy and draft of the vessel. Surface-Piercing design allows the use of
propellers that are 15% to 25% larger than conventional inboard and I/Os of equal
horsepower. These propellers are designed or modified to operate 50% to 60% submerged in
the UNCAVITATED, UNDISTURBED water behind the transom, taking a clean bit of water each
time the blade enters the water, pushing with MAXIMUM FORWARD THRUST. This has provided 7%
to 15% increase in speed over conventional stern drives and as much as 30% increase has
been achieved replacing inboard applications.
At slower speeds (not planing) Simplicity Marine Drives units utilize the torque curve of
the engine to give more thrust working with the larger propellers. More speed and
increased economy are the results though the whole throttle range.
Simplicity Marine Drives have been in production since 1986 and are currently being
used world wide on commercial, government and private recreational vessels.
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