Testing a set of original Champion H10 spark plugs

Using a pressurized Champion spark plug tester to check out a refurbished set of original late 1930s Champion H10 spark plugs.

[@flivverchannel]

Really like the pressurized plug tester. Cool! I've seen some homemade ones, but love the original old tools

[@steveblancard5566]

It is a cool old tool. Ive had it over 30 years and used it a lot.

[@donvoll2580]

G day Interesting. Ths