Tecumseh SnowKing engine not running smooth
Could use some real help please.
I have an Ariens Model 924121 (1128) 30-inch Snow-Thro with the 11 HP Tecumseh Snow King engine. It is only a few years old with low hours on it since purchased new. I drain the gas completely at the end of each season and am a sticker on maintenance. This past December 2009 was it's first usuage of this winter season. It fired right up but had an oscillating idle and ran that way right up to full power. However, when under a snow load, the engine ran smoother until the load was cleared and then would run with the up and down rpm cycle continuously until under load again. Both engine and Sno-Throw manuals are totally worthless on how to trouble shoot and repair this problem. Called Tecumseh directly and they were of little or no use except to direct me to take this machine to a Authorized Service Center. This Sno Thower has no visible carb or easy access to it and does not use the typical air cleaner assembly as are used on lawn mowers. So getting to the carb to spray in some GumOut or make any fuel adjustments is not simple since this task as neither are addressed in either manual. Any ideas on what do, please ?