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08 Mercury 75HP EFI 4 stroke issues

Itsallgood71

New member
I have a 2008 75HP EFI 4 stroke that when the motor is cold it will start right up and idle fine after the motor builds heat it idles erratically from around 600 to 1000 rpms and will die on occasion but starts right back up. If you give it throttle in gear it will go but seems to have a miss or hesitation at any RPM under around 3400 RPMS. Motor does awesome on the big end from 4K to 6k. The boat shop has replaced the VST and fuel filters but still does the same thing. Any advice would be great.
 
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