Hi Dan I meant to include Champion Spark plug link, page 4 explains all you want to know.
http://www.championaviation.com/pdf/64552_Champion_ElecL.pdf I noticed you are using REB 37 b which is 2 nickel electrodes. If you use an REB 37e (2 massive electrodes) or a REB 37n (4 massive electrodes, they can be found cheaply on eBay. Brant Hollensbe
