Posted by Ia Roy on May 27, 2017 at 08:33:58 from (72.168.161.65):
Model 422437. Type 105001 Code 87110312 or 81100312. Not sure on the 2nd code number. This engine is in a Snapper garden tractor. It idles fine. When coming off idle it misses, sputters, and tries to die. I have it running, but not right. I need to play with the choke too much. I can only find one mixture screw. It is under the back side. It doesn't seem to do much when adjusted. This has a vacuum pulsation fuel pump. The pump appears to be part of the carburetor. I had it apart last year and cleaned all the inside and passages. Is there a way to check the pump to see if it is doing what it should? It must go directly into the bowl. Any links to this carb for diagrams or trouble shooting? I was told that the engine numbers told what the manufacture year was. What do the numbers tell you? Thanks to all in advance. I will give you feedback.
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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