book shows it to use L77J4 , what is the difference between these and L77JC4
D derekj Recruit Joined Jun 6, 2008 Messages 2 Jul 2, 2008 #1 book shows it to use L77J4 , what is the difference between these and L77JC4
tashasdaddy Honorary Moderator Emeritus Joined Nov 11, 2005 Messages 51,019 Jul 2, 2008 #2 Re: 1977 Johnson 115 spark plugs this is the updated list. 115 1973 - 1979 QL16V Surface Gap or QL77JC4 gapped @ .030 recomendend the QL77JC4 C stands for copper, Q is quiet, for electronics.
Re: 1977 Johnson 115 spark plugs this is the updated list. 115 1973 - 1979 QL16V Surface Gap or QL77JC4 gapped @ .030 recomendend the QL77JC4 C stands for copper, Q is quiet, for electronics.
D derekj Recruit Joined Jun 6, 2008 Messages 2 Jul 2, 2008 #3 Re: 1977 Johnson 115 spark plugs so your saying the L77JC4 is the correct plug