Re: Is it ok the leave 1991 40 hp johnson / OMC controls connected to battery over wi
If you mean will it harm the motor, probably not. However, it is not the proper way to treat a battery. A battery that is discharged 50% will freeze at minus 15F. A fully charged battery is good to minus 85F.
So, it would be wise to remove the battery and store it in a protected place and keep it charged.