OK here it is---the smart choke. This electric choke reads the temp of the engine and decides what to do. On very cold days I have had a perblem. I would start the coach and after 3 or 4 min it would die. The choke would be open but the engine would not be warmed up. The unit with a hole in it goes under a headbolt near the water jacket. I think this will work better than a regular electric choke for us up north. The NAPA Part # is 2-1603. Cost is about $60---the local NAPA store would not honor my prefered customer account #---what can I say---I am in Orlando. Iike the concept---we will see if it works.