Game Fisher 7.5

[Viking]

Recently inhereted a 7.5hp gamefisher outboard. Looking for any info I can get like parts availibility , owners manual etc. I'm told it needs a new coil but I also see sparkplug is missing. It has a Tecumseh motor with the numbers 640-18A (model#?) and 9068(serial#?). Anybody have any idea what year it is and where to get parts? I used to have a 9.9 Game Fisher. It was a great motor. Had it mounted on a two wheel dolley in my garage( easy to move around and work on) Woke up one Sunday morning and found two tire marks accross my front lawn where the thieves wheeled it away. I miss that motor . Anyway any help with 7.5 is appreciated. Thanks Mike