2000 225 Efi

[River Randy]

Been running fine untill last time in the gulf. Act like it is not firing on one cyl. Put a timing light on each wire, seems to fire OK Changed plugs with no help. Changed stator with no help.Compression 125-127 each cyl.Rpm at idle is down about 300 rpm, runs rough at any speed with loss of power. No idea what to do next, external and internal fuel filters changed. Everything looks OK. Does a shop have the equiptment to check the ecu boxes and the cdms?

[boats.net]

Need to check fuel pressure, if ok then may have plugged fuel injector.