1968 Evinrude Ski-Twin, Ski-Twin Electric 33 HP Outboards Service Manual, Page 52Get this manual
driveshaft pinion gear rotates constantly with the eration of the motor and drives two bevel gears which revolve freely the shaftThe clutch shifter dog is splined to the shaftIn neutral operation, the shifter dog with detent spring and balls is centered between the two gears, which revolve in opposite directions, and remains motionlessIn forward reverse operation, the shift lever causes the shifter dog to engage either gear Power is then transmitted from the rotating gear, through the shifter dog, to the propeller shaft and
REMOVAL OF GEARCASE
It is possible to remove the lower gearcase as-
Figure 6-5Gearcase Attaching Screws
sembly without removing the power head from the motorHowever, if disassembly of the exhaust housing is required, it is necessary first to remove the power headSee Section for instructionsThe gearcase assembly removed from the exhaust housing and power head as follows: