Got the rubber plugs from Mcmaster carr
McMaster-Carr is the complete source for your plant with over 700,000 products. 98% of products ordered ship from stock and deliver same or next day.
Hole saw a metal or plastic plug at least 1/2" thick (my LT500 was 46mm or 1.812" 1- 13/16)")
Drill and tap Pipe Size 1/8", NPTF use a 1/8" fitting



Spark Plug Seals The Head
