I have a 1988 toro 20622 mower I picked up for $35. Has not ran in years. Took the carb apart my self, cleaned it out, still has compression and got it to run. Runs on full throttle rough and dies when I decrease throttle. Has the blade clutch but is missing the belt for it. Your opinion matters, should I take in to service or sell it? I don't have money for a brand new mower FYI