My 235 with a Rochester B will need the choke on the fist start of the day..why? I don't know. After that is good to go. Summer time it is on for about 15-20 seconds. Then off you go. Last winter it took a few blocks pushing it off a bit at a time until it was all the way off. Well tuned? It starts easy, runs well and gets me there. Gas milage? Maybe 15 in town, and a bit more on the road. Works for me.
