Normal factory location is for the grounds to be attached at the rear starboard powerpack mounting stud, with star washers.
The ground that is associated with the shift switch will have no effect on your starting issue if it is disconnected.
I have moved my powerpack ground to the top stud of #1 ignition coil on all my engines.
The ground that is associated with the shift switch will have no effect on your starting issue if it is disconnected.
I have moved my powerpack ground to the top stud of #1 ignition coil on all my engines.