I'm no expert, but when my old Eskimo was doing the same thing last year I completely dismantled the carb, cleaned everything up nice, put it all right back together again (no new parts), reset the adjustments and it ran like a champ again. One word of advise though - don't do it on the kitchen table. Thought I had everything covered up, but the cleaner still took some finish off in places and I landed in some hot water. Also, I lost that tank spring years ago and replaced it with some 3/8 bungee material that hooks right over the original spring anchors. Not quite as solid, but it works alright. Good luck!