OMC Evinrude Johnson Drive Shaft

An OMC Evinrude Johnson drive shaft transmits power from the engine to the gearcase (lower unit). It also plays a role in engine cooling by driving the water pump. The drive shaft consists of both a lower shaft (Part Number 335677 and an upper shaft (Initially 339769, superseded to 345879).

Elaboration:

Function:

The drive shaft is a crucial part of the drivetrain, transferring rotational force from the engine to the propeller.

Components:

Lower shaft: This is the part that connects to the propeller and gearcase.

Upper shaft: This shaft connects to the engine and is also part of the cooling system. 

Water Pump: The drive shaft rotates the water pump, which is essential for circulating cooling water through the engine

Part Numbers

Specifically, the lower shaft is part number 335677, and the upper shaft's initial part number 339769, which later superseded to 345879