This is my forge before and after adding the spark plug. I have always wanted to have a push button start. Warning ,don't let gas buid up. NO FUEL AIR BOMBS ..please. Also the silly little push button start off a barbque can give you an incredible jolt !! Be careful.
Step 1: Drill and tap
I drilled a pilot hole and then the correct hole for the tap for the spark plug.Check out the video for my new favorite tap handle.
Step 2: Resistance is futile
I had a weak spark because the resistance plug has a huge gap inside that is too much for the piezoelectric button starter.... So I hit it with a hammer...exposing the copper core to attach the lead to.
Step 3: Adjust the air fuel by regulating pressure and nozzle position.
This is a 1/4 " pipe with the end welded shut , ground to a taper and drilled with a small ,# 70 or so drill bit.