I recently aquired this 1970 Evinrude 85 from a guy at work. It has been sitting in his shed for 15 year or so he said. According to him it ran when he quit using it. I got it mounted up and picked up a new battery and gas. When I crank on the thing it does not fire but when you quit cranking and go back to igniton on the switch it will fire when it rotates beween compression. If you have it choked up and ready to run it will run back and forth between cylinders after you quit cranking. I jumped across the ignition switch thinking it was bad but it does the same thing. Does anybody have any idea's or ever seen this before that could give a direction to go with it? I took it to a shop and the cleaned up the points and made sure the ignition was cleaned up and they got it to fire only on 2 cylinders while cranking. They told me they weren't sure where to go with it and didn't want to put several hundered dollars worth ignition parts that still might not fix the problem. They did tell me that it had excelent compression on all 4 cylinders and they cleaned the carbs up. any help would be greatly appreciated.
