Reply To: park plugs and gaps on 48B?

[Kim Scorah Bourget]

Bill,

In my 1915 Pierce Arrow C-3 I am using the Champion W-18 and this is what most people with Series 3 and earlier Pierce Arrows are using as these cars have a trembler coil with commutator ignition along with the Bosch magneto.I believe the Series 4,Series 5 and Series 31-51 may take a 7/8 Regular which in an available plug at a parts house would be a Champion W-16Y.I have the parts books for Series 2,Series 3 and Series 4 and there is a plug difference when it comes to Series 4.Some of the Series 4 owners could advise on what they are using.Both the Champion W-18 and W-16Y should be available from any auto parts suppliers as these plugs have industrial applications.