Marine dual propeller lower bore drive assembly

Details Marine dual propeller lower bore drive assembly Marine dual propeller lower bore drive assembly

1993-05-28

1994-11-22

Swinehart, Edwin L.

Marine propulsion

Screw propeller

Propeller arrangement

440 89, 440 75, B63H 510

Patent

active

053663985

ABSTRACT:
A marine drive (10, 310) has two counter-rotating propellers (12 and 14, 312 and 314). Inner and outer concentric counter-rotating propeller shafts (40 and 42, 340 and 338) are supported by a spool (38, 336) in the lower horizontal bore (28, 328). Passages are provided in the housing for communicating lubrication and/or exhaust with the horizontal bore. Locking structure (50, 404) holds the driven gears and bearings in place in the lower horizontal bore.

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