1969 Evinrude 40 HP Big Twin, Big Twin Electric Lark Service Manual 4596, Page 65Get this manual
the pump acts as circulator, enough water being provided by the forward motion of the motor through the waterSee Figure 6-3Heavy duty water pumps are available for service in extremely sandy or silty waterways 2The forward and reverse driving gears; 3The propeller shaft; 4The forward and reverse clutch hubs, splined to the propeller shaft; 5The forward and reverse clutch drive springs, anchored to their respective gears and floating on the clutch hubs;
GEARCASE AND MANUAL SHIFT The gearcase and shift linkage consist of: 1The driveshaft pinion gear; 2The forward and reverse driving gears; 3The propeller shaft; 4The clutch shifter dog, with detent spring and balls, splined to the propeller shaft; 5The clutch dog cradle and shifter lever; and 6The shift lever linkage to handle on starboard side of lower front motor coverSee Figure 6-4When "FORWARD" on the remote control is selected, the circuit through the forward drive coil is completedThe energized electromagnet attracts the free end of the clutch drive spring to the clutch hubThe revolving spring is caused to drag and wrap itself tightly around the hub to establish direct coupling with the propeller shaftForward drive is retained until "NEUTRAL" is selectedThe electromagnet is de-energized instantly when the circuit is broken, the drive spring is allowed to resume its normal pOSition, and the spring floats on the clutch hubAction is the same for the reverse clutch assemblyMECHANICAL POWER FLOW Power is transmitted through the driveshaft to the drive pinion, which drives both driving gears and drive springs with it continuallyWhen either clutch coil is energized, the corresponding drive spring wraps itself around the clutch hub, transmitting power through the hub to the propeller shaft6The forward and reverse coils, operated by battery current and controlled from the remote control unitSee Figure 6-5