2005 Yamaha F90TR 90HP Outboards Factory Service Manual, Page 207Get this manual
Ignition and ignition control systemFuel control system Switch position Free Push Lead color Bluegreen (LG) Black (B)
Checking the main and fuel pump relay (main control)
1Remove the main and fuel pump relay 1
S6D88100
Fuel control system
Checking the injectors
1Measure the resistance of the fuel injectors
S6D88090