Hello Guys, need a little help with a very frustrating issue. I have a 90's STX38 yellow deck. 12.5 Kolher. Since I've owned it, for a couple of years now, it's always been difficult to start. But once started, it runs fine. When it starts I have to be easy on the gas, or it will die. I let it warm up and then I can give it more gas. I've had the carb apart several times, cleaned it, no improvement. Now it won't start at all. It's got good spark, after trying to start it, I remove the plug very little gas on it. I tried ether, it fires up on it then dies, now it won't start on ether. Confused, Thanks.