If you have good spark, clean air filter (replace anyways), try choking it half way or so. If it runs better, then it is running too lean, probably a clogged orifice or jet in the carb. If choking it makes it run worse, then it is likely running too rich. Could be a float problem, or metering tube that is clogged and isn't spraying.
Answers & Comments
If you have good spark, clean air filter (replace anyways), try choking it half way or so. If it runs better, then it is running too lean, probably a clogged orifice or jet in the carb. If choking it makes it run worse, then it is likely running too rich. Could be a float problem, or metering tube that is clogged and isn't spraying.