I need some help. I recently bought a 1969 85hp evinrude. It appears to be in great condition (very clean) and the previous owner states that it runs fine. I was trying to start it today and so I hooked up a set of controls off of my 1973 Johnson 65 HP (both are electric shift). Both plugs are marked B3 and seem to match. When I crank the outboard continuously it does nothing, HOWEVER, when I let off of the key it fires a few times. When it does fire the flywheel goes forward as normal and then in reverse (inches in each direction). If it fires multiple times then it goes back and forth. Could you please tell me what could be making it do this. Are the controls wrong? Is it flooded? Or is my timing off? Perhaps my compression is screwed up(have not checked at this time)? Any help would be appreciated.