Jesus H wrote:

My lawn is getting away . I have 2 lawnmowers, a Techumseh, and a Lawn
Boy. Each cost me about 50 bucks used, each cut the grass once, then each
died
and I cant seem to get either working again. Grrrr. It's not like I am
mechanically dissinclined or anything. I have had both carbs all apart,
bought new parts for both. still, neither will start . The rope finally
broke on one from pulling so much. The carbs are just crippled. I wish I
could afford a decent lawnmower. On the bright side, a deer and her fawn
like to come over and eat.

http://ca.geocities.com/doyoulikeithere/

What makes you think it is the carb? did you check anything else first?
When diagnosing engine troubles start with the obvious, make a checklist and
go by it instead of tearing everything apart for no particular reason.
ie: (just a for instance)
1: got oil? (clean good oil)
2: got gas/ (good clean recent gas)
3: is there a spark?
4: is it a good blue spark capable of jumping a 1/4 inch or so?
5: Hows the spark plug
right one? clean?(outside too) gap set correctly? not worn?
6: Whats the air filter look like?
7: whats the muffler look like, good shape? not plugged up?
8: does the choke work?
9: is it flooded?
I could go on but you get the drift.
Eric