OMC Evinrude Johnson Rotary Switch

The OMC Evinrude Johnson rotary switch part number 390644 is a lever switch used to select different operating modes on OMC outboards. It typically controls functions like gear shift, start, and forward/reverse/neutral. The switch itself is a mechanical device that uses a rotary motion to select different electrical connections, allowing for various operational modes in the engine.

Here's a more detailed breakdown:

Function: This switch is a critical component for controlling the outboard motor's operation.

Type: Its a rotary switch, meaning it uses a knob or dial to select different positions, each corresponding to a specific function. 

Application: it's used in OMC Evinrude and Johnson outboard motors to control key functions.

Part Number 390644 is the specific part number for this type of switch 

Control: It typically controls gear selection Forward, Neutral, Reverse, engine starting, and other related functions.