Reply To: 1955 25hp Johnson RDE-17 spark plugs

Home › Forum › Ask A Member › 1955 25hp Johnson RDE-17 spark plugs › Reply To: 1955 25hp Johnson RDE-17 spark plugs

April 30, 2021 at 12:48 pm #237447
Mumbles
Participant

    You don’t need the J plugs when using TCW III oil. They were meant for when fuel was mixed using 30W motor oil.

    • This reply was modified 5 years, 6 months ago by Mumbles.