David Butler
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- May 28, 2001
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questions for the experts. Would like to know how often i should decarbon my engine? i have a 75H.P. Mecury Oil injected EFI. Motor is going into its fourth season very low usage approximately 70 hours. I change plugs every year (plugs do not show carbon fowling) the plugs are the no gap type put them in tourque and go.