Yamaha Marine Outboards Factory Service / Repair/ Workshop Manual 225G 250B L250B, Page 324Get this manual
FUEL CONTROL SYSTEM
INSPECTING THE FUEL INJECTORS 8
1Inspect: Fuel injector operating sound No sound (no fuel is being sprayed) Inspect the high-pressure fuel pumpInspecting steps (1) Remove the intake silencer 1(2) Start the engine(3) Fully close the throttle valves(4) Attach the screwdriver onto the fuel injector body and check if all of the fuel injectors have solenoid valve operating sound