Briggs and Stratton engine Model # SV600S
I'm trying to get a Toro riding lawn mower running. My son lived in Tennesee and mowed his lawn as a last act before moving here to Louisiana. We unloaded the mower and attemted to start it. It cranked over well but would not start. Checked spark and fuel both good. Changed plug and checked compression. Has compression not sure what the reading is. Will not start. Removed and cleaned carburator reinstalled. Sprayed carb cleaner into carb. Backfires thru carb. Checked valves. Push rods intact and the valves seem to be non adjustable. Looks good. Engine just spins with no indication of ignition unless carb cleaner is sprayed into carb and then it just backfires thru the carb. Any thoughts would be welcome.