Reply To: Early Johnson Mystery

[Tubs]

Pretty sure its 1/8-27 NPT Pipe. A hardware or home improvement store should have them. Cut the head off and slot it. If it doesn’t stop and goes all the way in,the plugs in the past have been over tightened and enlarged the hole.

Example

https://www.schedule73parts.us/products/bla17233?variant=43838806425792&country=US&currency=USD&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&srsltid=AU7gw4Xe0rvLSJDJXd2ej3BDW7RrDB_nBg8ZpK2bwqqwOHne_1_oAu5s5ZM&com_cvv=8fb3d522dc163aeadb66e08cd7450cbbdddc64c6cf2e8891f6d48747c6d56d2c

A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.