Method and apparatus for improving reverse thrust of a marine dr

Details Method and apparatus for improving reverse thrust of a marine dr Method and apparatus for improving reverse thrust of a marine dr

1994-04-28

1995-11-28

Sotelo, Jesus D.

Marine propulsion

Screw propeller

Having transmission

440 89, B63H 2128

Patent

active

054702631

ABSTRACT:
A marine drive has a reverse thrust cup on the propeller shaft between the propeller hub and the rear retaining nut. The reverse thrust cup permits the propeller hub to slide on the propeller shaft fore and aft. When the marine drive is in the forward direction the rearward thrust of the propeller forces the propeller hub to the forward position thereby directing engine exhaust out the rear of the propeller hub. Conversely, when the marine drive is in the reverse direction, the forward thrust created by the propeller hub forces the propeller hub to the rearward position thereby directing exhaust out a forward exhaust opening forward of the propeller blades increasing the reverse thrust of the marine drive.

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