To stably supplying fuel to a model engine which is used under severe conditions.

A magnetic core 34 having a flow passage 35 therethrough is inserted into a solenoid coil 32 in an equipment body 31. A movable valve element 38 which is magnetically attracted by the magnetic core 34 is in the coil 32 in the equipment body 31. The valve body 38 has a flow passage 39 communicating with the flow passage 35. The valve element 38 is urged by a flat spring 44 to be brought into contact with a valve cage 36, to close a fuel injection port 37. A check valve 24 is in a fuel feed passage 48. The fuel in the equipment body 31 is pressurized through a diaphragm 26 at air pressures of 20 to 100kPa which re developed in the crankcase in an engine. Since fuel is supplied into a fuel injector 30 with no pressurizing and is locked in by the check valve 24, even under severe running conditions where the pressure of air unsusceptible to the force at acceleration is used to pressurize fuel, fuel supplying is stabilized and the engine is free of its stall due to the lack or excess of fuel.