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An Electronic Fuel Injection system has been developed for utility engines which will reduce exhaust emissions and give greater control of the Air/Fuel ratio compared to the standard carburetor. Standard automotive components were used when possible. The Electronic Fuel Injection system is a port fuel injected design using a bottom feed fuel injector which sprays directly on the intake valve. The engine speed/position, throttle position, air intake temperature and cylinder head temperature are measured and fed into the Electronic Control Unit. Look-up tables are used to determine the injection duration time during starting, warm-up, acceleration and normal operating conditions. Normal operating conditions are conditions the engine would encounter during actual use such as idle to governored rpm, no-load to full load, ambient temperature ranges from -40°C to 55°C, and any combination of the above.