Tag: Rich mixture

According to automotive experts, a carburetor running too rich is a common problem in older vehicles and small engines, leading to decreased performance and efficiency. This guide explores the tell-tale signs of an overly rich fuel mixture, from visible exhaust smoke to changes in engine behavior, helping you identify and address the issue effectively.

For pure octane gasoline, the stoichiometric, or ideal, air-fuel ratio (AFR) is exactly 15.1:1. This means that a 15.1 AFR is not strictly rich or lean, but represents a state of perfect chemical balance for a specific fuel type. However, when applied to standard pump gasoline with additives like ethanol, this ratio behaves differently.