If I moved the throttle forward too quickly on the 172 I learned
on, there would be an almighty bang as it backfired and it would
cough and splutter and take longer to pick up again. I learned
quickly to move the throttle forward smoothly!

Paul

"G.R. Patterson III" wrote in message
...
I would slam the throttle forward with the palm of my hand, while getting
the
carb heat off with my thumb. My instructor said it wasn't necessary to
move that
fast.