- May 28, 2001
- Reaction score
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.