2005 Yamaha F90TR 90HP Outboards Factory Service Manual, Page 58Get this manual
Fuel system
Reducing the fuel pressure
1Remove the cap 12Cover the pressure check valve of the vapor separator with rag, and then press in the pressure check valve using thin screwdriver to release the fuel pressure
CAUTION:
Do not rotate the quick connector tab past the stopper position a, otherwise it could be damaged When the fuel hose is disconnected, quickly remove the retainer from the quick connector, otherwise the retainer could be lost2Disconnect the quick connector from the fuel rail directlyS6D84180
WARNING
Always reduce the fuel pressure in the high-pressure fuel line before servicing the line or the vapor separatorIf the fuel pressure is not released, pressurized fuel may spray outS6C14250
WARNING
Always reduce the fuel pressure in the fuel line before servicing the line or the fuel pipeIf the fuel pressure is not released, pressurized fuel could spray out