Tecumseh diaphragm carb 1of2 Toro S140 S200 S620 rebuild

Craftsman & others use this exact style Tecumseh Carburetor
diaphragm carb

PART 2:    • Tecumseh diaphragm carb 2of2 Toro S14...  

2 and 4 stroke engines
Most commonly found on Toro S-620, S-200 S-140 and craftsman edgers

Most Carbs are going to have the gasket touching the body of the carb and then the diaphragm. Carbs with an F stamped on them like this one will have the diaphragm touching the body and then the gasket.

To Adjust:

If your needles were not set back to original or if they were played with you may need to redo the settings.

To start set them to:
L: turn it our 1 turn
H: turn out 1 1/4 turn

This is enough for the engine to run. Start and let run until it is warm. Turn the H out (ccw) until the engine stumbles. Then count the turn and turn it in until it stumbles. "IF" the difference between the two was 2 1/2 turns; turn the H out half the amount or 1 1/4 from that position.

For the Low side you need to manually hold the governor linkage-throttle to the idle position. Do the same as I described for the High side setting the needle half way between each stumble test.