TR4 plug color

[CarlSereda@aol.com]

Mark,
Your TR4A plugs should be no darker than coffee icecream ie; light tan.
I recently heard Colortune is less helpful with today's fuel formulas.
Have you done any investigation of your jet needles? They can wear a long 
spot on needle length altering your mix and also ovalize the jet hole ruining 
proper fuel metering.
Carl
'63 TR4 since '74

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