Running Rich

[mnbvcxz690000]

what does this actually mean, is it using to much petrol?

[Busky2k]

Rich means the engine is burning more petrol than the stoichiometric ratio ie 14:7:1 (air:petrol) at a given moment. OTH, less petrol than 14.7:1 means running 'lean'. However, lean or rich could be any condition above or below a 'target' ratio, such as 12:1 on full throttle.

To Richen Up = more petrol

To Lean Out = less petrol

Edited November 12, 2005 by Busky2k