What is the best brand plugs, model and gap for a 1993 Johnson 90 hp V4???
S swfl 1st boat Cadet Joined Mar 20, 2010 Messages 8 Mar 27, 2010 #1 What is the best brand plugs, model and gap for a 1993 Johnson 90 hp V4???
bktheking Vice Admiral Joined Jul 29, 2008 Messages 5,057 Mar 27, 2010 #2 Re: best plugs???? Loopcharged - Champion QL78YC Crossflow - Champion QL82C Gap .030
D Dhadley Supreme Mariner Joined Feb 4, 2001 Messages 16,978 Mar 28, 2010 #4 Re: best plugs???? A lot will depend on how the motor is set up and what fuel you use. If anything is going on that creates additional combustion temps then you should use the alternate plug, QL77JC4.
Re: best plugs???? A lot will depend on how the motor is set up and what fuel you use. If anything is going on that creates additional combustion temps then you should use the alternate plug, QL77JC4.
