Have a Craftsman tiller with a 2 cycle motor, I believe it is a Tecumsa, It has a Tillotson carb on it. HU96A,, have rebuilt the carb, the seat looks good. Anyone have any ideas on why the needle won't shut the gas off. I can get it running, but very shortly. When it shuts off the gas continues to run out.

 

Hard to know without checking it, but the needle most likely isn't seating or the diaphragm is torn.

 

A couple things to check, the rivet and ridge on the diaphram always face up, if there is an F spamped in the carb housing the diaphram is installed first then the gasket, without the F the gasket is first. Have a good one. Geo

 

Geo,,, you said the rivet and ridge face up,, someone had been in this carb before, when I put a kit in it,, I put things the way they came out,, there is a flat washer type thing on the diaphragm and the back side there is just a head of rivet. which side goes toward the needle?,, on this carb the diaphragm is on the top

 

Head of the rivet, Have a good one. Geo

 

Cheese;
Check page 10 of the Tecumseh 2-cycle manual, it says the opposite. Have a good one. Geo

 

Here is link to the Tecumseh 2-cycle repair manual, I would have posted it before but my link didn't work. Have a good one. Geo
http://www.smallenginesuppliers.com/...nformation.pdf

 

You are right, I didn't go back and read the beginning again to recall that this was a tecumseh with a tillotson, not an ordinary small 2-stroke with a zama/walbro. Editing my incorrect post.

 

WHEW!!! Thanks guys,, thought we were gonna have a fight here for a bit. LOL,, I turned the diaphragm over,, it doesn't seem to leak gas now,, but very hard starting,I did get it running for a bit,, but seemed to get too hot, got the correct oil/gas mix so not sure what could be causing that, thinking I might have other problems, possibly partly sheared key in flywheel? Not too sure about the primer bulb either concerning the hard starting, Been too hot to do much with it today, will play again when it cools off some,, too old and fat to do much in the heat..

 

Nah, if Geogrubb says something that I don't agree with, I stop and think hard, cause he knows his stuff. I wasn't sure what he meant by "the head of the rivet", so I clarified... but now I know why it didn't make sense to me... different carb than what I had in mind.

If it's getting too hot, it could be running too lean (carb adjustment or setting), or ignition timing problem (flywheel key or points if this has points). I don't get to see very many tecumseh 2-stroke engines in my area (and for that I am thankful). I think the majority of them are on snowblowers, and we don't get snow.