Well its never easy for the old ones. I rebuilt the carb, put new impeller in and go to start and no key switch. ****!!! Bought the motor 2 weeks ago finally got time to work on it and now this. I looked at the color diagrams on file for a 1979 35 merc 2 stroke and it says purple with white choke, purple ignition, blk ground, red with purple plus battery, blk yellow stop, yel with red starter, thats great. I only have solid yel. solid red, solid black, solid white, solid pink. there is a choke switch still in control box with a wire but i paid no attention to color. This is never easy. Now what I do??? Should I hook black and red up to a switch and start adding wires till I find the choke wire, Now I only have 3 to identify. What do you suggest. I ordered a switch and I should have Fri.