I have the exact same problem, Mercury 60hp EFI 2006 model, i have changed the IAC , new plugs, fuel filters x 2, new thermostat and new fuel line/hand pump but no luck, next I will try heat sensor then low pressure fuel pump.
Hi to all I hope someone can shed some light on my issue, I have Mercury 60hp EFI 4 stroke 2006 and I'm having troubles when the motor is cold, starts first time every time but until it warms up at low revs (1500 - 3000) its running sick, sometimes stalling, If I take it out for a spin high...