Reply to "My engine strarted popping last night."

I'm far from an engine guru, but I'd pull a few plugs to see if you're running lean or rich. I'm assuming the popping is backfiring and not afterfire, and that you're running lean or the timing has gone off. I'd start with the fuel filter to make sure it isn't clogged and restricting flow, check the float level, the fuel lines, needles and seats (often something will keep them open and flood an engine, maybe something is blocking and restricting flow) etc. ... some carbs have an integral (or in-line) fuel filter at the fuel inlet - check your carb specs - if that's the case, check that it isn't clogged. If you have or can borrow a spare carb, swap it out and see if things change.
Then check your timing to make sure it hasn't gone way out of whack.
Let us know what the plugs look like.