Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

The float does not drop in this carb. My Dad has a Craftsman (MTD) 10hp wood chipper that does not start. I took the carb off and it was all gunked up. I cleaned it pretty well and when I put it back together. Thats when I noticed that the needle sticks in the seat of of the valve after the float is raised with my finger. When I let go of the float it tries to drop back down but needle does not free itself from the seat. 
Did I do a lousy job cleaning the carb or does the seat need to be replaced?  I have heard of a needle/seat not closing a valve (and overflowing the bowl) but I am not familiar with this sticking issue. What would be the best course of action? There are several rebuild kits for  HM100 carbs. Could I just put in a new seat? Or maybe clean the seat better? What would cause a needle to stick to the seat? Maybe the seat is made of rubber and all the carb cleaner I used dissolved the rubber enough to make it sticky/gummy?  This Tecumseh engine's numbers are:
HM100
159287P
STP358U1G2RB
8117D

I could not find the exact match for my engine number when looking for a rebuild kit. The two kits I did find were :

TEC632760B or  632347

The kits come with needles and I don't see any needles on my carb. Very odd.

YES u should replace the needle & seat...u should be able to just buy the needle & seat by themselves they usualy cost $2-3 for the pair.  l would also make sure the carb is clean 100% or u could have other problems. also make sure u replace the rubber o ring gasket on the carb bowl and make sure where the o ring seats on the bowl is very clean to make a good seal..  o -rings are about $.50 cents..  u can sometimes get the o ring needle & seat as a kit for around $5.

 if u have the master kit which sounds like u do then needle in the kit are extras made for older adjustable carbs

Thank for the help.  I ordered this $4 kit today from Kentucky:
Tecumseh Needle and Seat Kit 631021B / 12263
The kit includes the large rubber bowl ring but not all those extra needles.

http://cgi.ebay.com/NEW-Tecumseh-Needle-and-Seat-Kit-631021B-12263-/110717221558?pt=LH_DefaultDomain_0&hash=item19c742bab6#ht_825wt_744

Yup thats the one!!! ...Good luck