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Ronnieroadster · 07-01-2014, 02:50 PM

If the screen removal did not help try NGK spark plugs if your not already using them. NGK offers two heat ranges for the flathead the plug numbers are B-4 and B-6 the B-4 plug is the hotter plug. If your using champion H-10 plugs I gave up on them years ago their made in mexico and and in my opion are junk.
Autolit also offers a plug for the flathead part number 216 its much better than champion but not as good as NKG plugs.

07-01-2014, 02:50 PM	#11
Ronnieroadster Senior Member Join Date: Dec 2010 Location: East Coast in CT Posts: 1,524	Re: changing plugs every 100 miles!! If the screen removal did not help try NGK spark plugs if your not already using them. NGK offers two heat ranges for the flathead the plug numbers are B-4 and B-6 the B-4 plug is the hotter plug. If your using champion H-10 plugs I gave up on them years ago their made in mexico and and in my opion are junk. Autolit also offers a plug for the flathead part number 216 its much better than champion but not as good as NKG plugs.