The Stovebolt Site Forums The Shop Area Engine Shop Hint for cold weather starting

If the hand throttle is used to set a throttle position prior to starting the engine, it is actuating the throttle linkage and accelerator pump just the same as the peddle does. I agree that it is probably much less liquid being pumped and as long as the engine starts well and you open the choke as much as the engine can stand, it seems to be a good sequence. The Rochester 2G 2 barrel on my 283 has a hand throttle, it actuates the entire throttle linkage just as the peddle does, maybe the single barrel carbs have a different approach.