Mercury Outboards: Switch box install and Stator Repair - YouTube
Mercury 14 Pin Wiring Harness Diagram, Connect the purple wire from the har-ness and a purple jumper wire to the I (Ignition) terminal of the Tachometer.
Mercury Switch Box Assembly - Sierra Marine Engine Parts - 18-5792 (118-5792) - ProPride Marine
NEW OEM* 0720 Mercury Quicksilver Switch Box 339-5287A1 | eBay
Amazon.com: Boat Ignition Switch with Key with Choke Replacement for Mercury 87-17009A2 87-17009A5 Outboard Motor Control Box with 2 Keys 3 Position 6 Wire Connectors : Automotive
Genuine Mercury Mariner Outboard Control Box 15ft Harness with Trim Switch 9.9HP 15HP 20HP 4 Stroke