I bought this 160 to fix up and resell, it wouldnt start with out priming, I found the choke was not closing and fixed that, then it would start but only after turning over a zillion times each time trying but not starting. I put a new battery in, changed the flywheel key though it didnt look bad, compression was at 48 which im told would pass but I put a head gasket in anyway, cleaned the valves while I was there both were closing tight and opening, still no change in the starting, so I kitted and cleaned the carb, still no change then I bought a used carb, and kitted it and still no change, then I bought a relay kit for hard starting john deeres and installed it, no it starts right up but runs a little rough, the fuel jet is fixed and is new, the air jet is adjustable but Im finding it runs better when it is completely out meaning open hole? any ideas