I just bought a 1980 15 hp johnson. It has Champion L77J4 in the engine now, is this correct?
S scottnchrissy Cadet Joined Aug 12, 2002 Messages 7 Aug 13, 2002 #1 I just bought a 1980 15 hp johnson. It has Champion L77J4 in the engine now, is this correct?
J Jack Shellac Lieutenant Commander Joined Aug 7, 2002 Messages 1,661 Aug 13, 2002 #2 Re: 15 hp Johnson spark plugs This is correct. Source: manual for same motor. Gap: .030". You can also use a QL77J4 if desired.
Re: 15 hp Johnson spark plugs This is correct. Source: manual for same motor. Gap: .030". You can also use a QL77J4 if desired.
S scottnchrissy Cadet Joined Aug 12, 2002 Messages 7 Aug 13, 2002 #3 Re: 15 hp Johnson spark plugs Thank you for the info. The plugs are very worn and need replaced. What are the differances between the plugs if any?
Re: 15 hp Johnson spark plugs Thank you for the info. The plugs are very worn and need replaced. What are the differances between the plugs if any?
S scottnchrissy Cadet Joined Aug 12, 2002 Messages 7 Aug 13, 2002 #4 Re: 15 hp Johnson spark plugs All I can find online is a L77JC4 and QL77JC4. Are these the same plugs just updated numbers?
Re: 15 hp Johnson spark plugs All I can find online is a L77JC4 and QL77JC4. Are these the same plugs just updated numbers?
J Jack Shellac Lieutenant Commander Joined Aug 7, 2002 Messages 1,661 Aug 13, 2002 #5 Re: 15 hp Johnson spark plugs Glad you asked question. Correct gap is .040" [ I was thinking of another motor]. OMC recommends either plug. Your numbers are the new Champion number for these plugs.
Re: 15 hp Johnson spark plugs Glad you asked question. Correct gap is .040" [ I was thinking of another motor]. OMC recommends either plug. Your numbers are the new Champion number for these plugs.
S scottnchrissy Cadet Joined Aug 12, 2002 Messages 7 Aug 13, 2002 #6 Re: 15 hp Johnson spark plugs Jack, Thanks again
