I'm in the process of installing an older Mercury Black Max outboard on a Tracker Nitro Bass Boat. I have the controls but no key, so I was wondering if anyone can help me out with finding the correct ignition to buy. It's a push-to-choke type ignition. I've attached a couple of pics of what I have. Is something like this http://www.iboats.com/3_Position_Pu...27382899--**********.431805479--view_id.39663 what I need? Thanks.