I know very little about these motors, but it's really neat looking. The owner said it is working, but I have not tried it. If you're interested I can ask my neighbor to help me test it. Please enlarge my pictures for a closer look.
I think this little guy is kinda special:. The item "VINTAGE JOHNSON 2 SEAHORSE OUTBOARD ENGINE BOAT MOTOR MODEL 2R78R NAUTICAL" is in sale since Sunday, August 16, 2020. This item is in the category "eBay Motors\Parts & Accessories\Boat Parts\Outboard Engines & Components\Other".
The seller is "wildgoosegirlusa" and is located in Temecula, California. This item can be shipped to United States, Canada, Bahamas, Uruguay.