Along with Honda’s Programmed Fuel Injection, the BF150 incorporates Lean Burn Control technology, which allows combustion to operate on a leaner air/fuel ratio than stoichiometric air/fuel.
An O2 sensor, together with the ECM, precisely controls the air/fuel mixture for the best fuel economy at cruise settings. The mode in which lean burn control is used during cruising to achieve higher fuel economy is referred to as ECOmo (Economy Controlled Motor).
Pair this with the BF150's Multi-Port Programmed Fuel Injection (PGM-FI) that delivers the precise amount of air/fuel to each cylinder, and what do you get? Quick starts, instant throttle response and low fuel consumption.