Koso North America BA004068 Air Fuel Ratio Gauge - 2/4-Stroke - Wide-band

This back lighted wide-band air/fuel ratio gauge will give you information on your engine to allow a more precise tuning. The programmable warning will tell you if your engine is running too lean or too rich. It is easy to install on either 2 or 4 stroke engines. Includes gauge, mounting hardware, O2 sensor and weld in sensor mount. Must purchase 2-stroke sensor adapter separately, P/N 27-5721.