On a Briggs Animal Alcohol engine, is it legal to machine the shoulder of the spark plug to get it further in to the cylinder head under NKA rules? I didn't see anything in the rule book that specifically mentioned the spark plug, other than the blanket statement below.
40.5.1: Approved components
All components to be OEM unless otherwise specified. Gaskets and fasteners non-tech
unless otherwise specified. Gasket sealer acceptable on all machined surfaces unless
otherwise specified. All parts to be stock appearing and are subject to be compared to a
known stock OEM part.
40.5.1: Approved components
All components to be OEM unless otherwise specified. Gaskets and fasteners non-tech
unless otherwise specified. Gasket sealer acceptable on all machined surfaces unless
otherwise specified. All parts to be stock appearing and are subject to be compared to a
known stock OEM part.