Please help. I have limited experience with outboards but am relatively competent with internal combustion engines. I have a 2009 Mercury 25 EFI 4-stroke that cranks but won't start. The choke and fast idle do not appear to be working. All was well with this motor until recently. I've replace the fuel lines, tank, fuel filters, plugs and the primary fuse. Fuel flows freely from the tank to the engine. Could there be a fuse other than the main fuse that I need to check or am I missing something obvious?