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badtrack 
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Joined: 02 Oct 2015
Location: United States
Points: 39
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 Topic: H3 carb tsx879
Posted: 08 Feb 2017 at 3:05pm |
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Only runs well with choke partly on.new valves and rings. New carb kit and cleaned carb 3 times. Any ideas on why I can not a just to run without a little choke?
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DiyDave
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Joined: 11 Sep 2009
Location: Gambrills, MD
Points: 50480
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Posted: 08 Feb 2017 at 6:11pm |
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Choke shaft felt seals might be leakin...
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badtrack
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Location: United States
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Posted: 13 Feb 2017 at 10:09am |
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After new carb kit choke shaft & throttle shaft fit well. Carb is a tax 879 type B. The engine block is am5363 & head is am5481. Engine # h1382r. I believe it's a 160 cid engine. Am I correct.
? The carb maybe for a 149 cod engine. Could this make the load jet too small?
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DiyDave
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Joined: 11 Sep 2009
Location: Gambrills, MD
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Posted: 13 Feb 2017 at 5:20pm |
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I may be wrong, but I think your carb is for the 160. On tractors this old, sometimes parts that "will fit" are not necessarily the right ones. How does the bore of the carb compare to the bore of the manifold?
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Hyperpack
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Joined: 05 Apr 2013
Location: 54806
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Posted: 14 Feb 2017 at 2:31pm |
I have a good running Carb for the 149, I would be willing to trade for the one you have. Hyperpack
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badtrack
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Posted: 14 Feb 2017 at 3:03pm |
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Thanks for the tip on checking the intake manifold compared to the carb venturi. The tsx879 is smaller by a quarter inch in diameter. My book showes a tsx 869 for the 160 cid engine. Don't know if I am on the right track yet. The engine runs well with some choke.
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kweeber
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Joined: 13 Oct 2015
Location: Colby, WI,54421
Points: 18
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Posted: 13 Apr 2017 at 7:31pm |
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Mine did the same thing and I found a small air leak where the carb met the intake manifold. Found it by spraying a little ether around carb, sped up when i hit the leak.
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Ferdinand
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Joined: 31 Mar 2016
Location: North Carolina
Points: 1951
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Posted: 13 Apr 2017 at 7:42pm |
 kweeber wrote:
Mine did the same thing and I found a small air leak where the carb met the intake manifold. Found it by spraying a little ether around carb, sped up when i hit the leak.
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Yes, it can be exactly what kweeber says and often is the case. You can use a can of FLAMMABLE brake Kleen or similar if you don't have Ether. Use one of those hollow sticks in the spray can nozzle to pinpoint where the leak is. On the other hand, it's possible that the main jet is clogged and the choke is allowing the engine to pull more fuel through the idle circuit. If you have been running Ethanol added fuel it will mess up a carburetor. If you don't find an air leak, take the carb. apart, clean it, and put it back together with fresh gaskets/seals. Should run just fine, then.Ooops, I just reread your post. Already put a kit in it. Go with the air leak.
Edited by Ferdinand - 14 Apr 2017 at 8:08am
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Because narrow is the gate, and narrow is the way, which leads unto life, and few there be that find it.
Mathew 7:14
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Kipn
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Joined: 12 Sep 2009
Location: Tewksbury, Ma
Points: 800
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Posted: 13 May 2017 at 6:43am |
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Had that happen with mine. Gravity fed carb and crap in tank partially blocked fuel line.
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1961 H3
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