Need help with 1989 Johnson 140 V-4 ? on Year

[Macrenovations]

The previous owner told me the motor was an 1989 Johnson V-4 VRO Model.Tried looking for any serial numbers but with no luck.Not sure where the serial number is located need to order a new impeller and head gaskets.
Second question : I have a broken wire that goes between the motor and the drive you can just see it underneath coming out of the case and the other part of the wire is going up into the motor. Not sure if this is just a ground or what any help would be great..