I�m confused and need some help again. My �49 A had a DLTX 71 carb on it and I could never get it to run right. After cleaning the carb, (cleaned the passages with the Roberts Carb bits) to no avail, I gave up on it and bought another used one(also a �71). The original had the stem broken off and had been brazed back on and I convinced myself that was the reason I couldn�t get it to run right.I took the second one apart to clean it up, and noted that the float and main needle valve was different than the �original�. The float was bent differently to set the gas level in the bowl lower, and the needle valve was larger and in fact seemed slightly longer. I compared the needle valves and in fact the replacement one would not fit into the original valve body As it was larger in �diameter� (even though it is a triangle). I used the replacement valve body, needle, and float and finished assembling the replacement carb after a complete cleaning. When I put it on the tractor I couldn�t get it to start, although it would pop once or twice. After a while of trying and playing with it I pulled the plugs and they were dry. I noted the pressure coming from the petcocks also seemed dry. I assume my problem is I�m not getting gas to the engine. Con someone clue me into why the two different types of floats and needle valve assemblies? One of them all fuel? Which do I use? I thought I had the gas level adjusted set so it covered both needle valve openings in the bowl. Any other hints for me? Thanks.
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