Go to partstree.com
....Click on the Tecumseh logo at bottom right. Then...click on carburetor
parts. Find carb number 631720B
and click on it....then on carburetor. This is orginal carb with
two (2) adjustment screws (main and idle). This part number is REPLACED BY 640290
, which is
same carb....but with ONLY
one (1) screw....the idle adj screw, and it's a limited movement screw.
This will give you the breakdown schematic for the carburetor you were asking about.
And, Shawn......When you were drilling thru 3 FEET OF ICE
to find NO FISH THERE
......I was sitting in front of
a fire place with a plate of hot wings and a very cold brewsky watching football. I am VERY GLAD
you were there....
and I was here. Maybe fish....NEXT TIME
??? HOPE SO