I rebuilt the carb on the 88. The instructions with the carb kit has three different illustrations of needle configurations. With the main jet on top , on the bottom, and fixed. My carb doesn't match any of the illustrations. I have a single large needle on top and a needle on the bottom bent like an &quot;L&quot;. By the parts picture the parts list is calling both these needles the same, and it also shows an idle needle depending on what version of carb. 

I want to think that the needle on top of my TSX-374 is for idle and the bottom is main metering. Is it possible that I have two halves of different carbs? I have the tractor running with the needles at generic settings. Two turns on top and four on the bottom. It's running smooth at full throttle, but it doesn't sound right at lower rpm and I can't make it idle without dying. 

The carb has been apart before I got a hold of it. It also has the brass tag with TSX 374 and 9 52 attached to the top half. 

If I have a correct and complete carb, is there an order to the adjustments? I am going to replace plugs, wires, cap, and rotor before I continue. Points were good.