Have an Echo GT-225 weed eater that's seven years old this month. Have done absolutely zero maintenance on it. Went to crank it up, and it was being stubborn to fire. Finally got it cranked, and it ran OK. Bought a new spark plug, and changed that out, and it is cranking up easy now. Fuel filter and air filter need to be changed. Primer bulb is looking rough too...starting to crack. Was shopping around, and I can buy a Chinese RB-K93 carb kit that includes a new carb, air filter, multiple fuel filters, two primer bulbs, spark plug, gaskets, and new fuel lines for about $15 or less. Are these Chinese kits worth buying? Ebay and Amazon are loaded with these kits from lots of different sellers.