Tecumseh tc II backfire

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   My tecumseh tc300 will only accelerate successfully with the choke half closed. If the choke is open and I accelerate the engine pops and then stalls or tries to stall. I don't know if this is a normal thing but the engine starts and runs with the needle valve screw completely seated. 

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bob Members Profile Send Private Message Find Members Posts Add to Buddy List Guest	Post Options Post Reply Quote bob Thanks(0) Quote Reply Topic: Tecumseh tc II backfire Posted: November/03/2005 at 4:38pm
	My tecumseh tc300 will only accelerate successfully with the choke half closed. If the choke is open and I accelerate the engine pops and then stalls or tries to stall. I don't know if this is a normal thing but the engine starts and runs with the needle valve screw completely seated.

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donp Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Master Regional Rider Joined: October/27/2003 Status: Offline Points: 8563	Post Options Post Reply Quote donp Thanks(0) Quote Reply Posted: November/04/2005 at 2:55am
	back the screw out 1 1/2 turns then adjust once warmed up.

bob Members Profile Send Private Message Find Members Posts Add to Buddy List Guest	Post Options Post Reply Quote bob Thanks(0) Quote Reply Posted: November/04/2005 at 2:40pm
	I did that already to no avail.I read one of the other postings and saw that you had suggested that.The best adjustment that I could get was with the choke half closed.I took the carb apart and ran a wire through every hole that I could get to. Are there any things that would be visably obvious inside the carburator? I pulled the stone type filter out of the gas tank and it seemed to be free and clear. Any other suggestions?

donp Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Master Regional Rider Joined: October/27/2003 Status: Offline Points: 8563	Post Options Post Reply Quote donp Thanks(0) Quote Reply Posted: November/05/2005 at 2:39am
	well the only reason it runs with the choke on is because there is a fuel restriction somewhere, or an air leak. 9 times out of 10, its in the carb. that stone in the gas tank is a fuel filter. make sure it is clean and fuel flows thru it freely.from there follow the gas line to be sure its not kinked, or soft enough that it just about sucks itself shut when the engine runs. go back thru the carb again with a piece of wire and follow up with carb cleaner. there's a lot of small holes in the venturi, make sure you go thru them all. if its a walbro carb with one large screw on the side of the carb where the gas line connects, you should see a silver colored mesh filter about the size of a crayons diameter. pull it out. it may be bad. check the intake manifold to make sure its tight. check the head bolts and cylinder base gasket. and make sure the muffler is mounted tightly, and is in good working condition. and post the model and serial number so that i can have a better idea of what you have.

bob Members Profile Send Private Message Find Members Posts Add to Buddy List Guest	Post Options Post Reply Quote bob Thanks(0) Quote Reply Posted: November/05/2005 at 2:49pm
	My model# is tc300-3008c-0180g I found a parts breakdown online for the carburetor. When I took the carburetor apart I noticed that it does not appear to have part #24 (gasket-metering diaphragm). It looks to be a gasket between the Carburetor body and the diaphragm. Here is the address for the parts breakdown for my Walbro wts-4b carburetor. http://www.wem.walbro.com/walbro/product.asp?CategoryName=Ice+Auger&Series=WTA&partnum=WTA%2D4%2D1&GroupName=Ice%20Auger&FamilyName=TECUMSEH