Most Syssa engines used a Walbro WT-813A carb with the separate Syssa made choke plate. Some engines were put out with the WT-645 that has the normal integral choke plate. Either carb uses a Walbro K20-WAT kit. You can find them on Ebay or at most any good small engine repair shop. I always suggest a real Walbro kit rather than some off brand unless you have enough experience to know which other kits are good. In most cases, if the engine was only run a few times, the diaphragms will probably be OK but one never knows for sure without an inspection.Even if the diaphragms are OK, be sure the internal screen is clean and free flowing and that the metering needle is free to move. Needles tend to stick after a carb sets for a long period of time. If they move freely they are usually OK. Good luck with your project.