Posted by cadet trooper on February 19, 2010 at 15:27:57 from (76.235.57.170):
In Reply to: Tractor smells posted by plow hand on February 19, 2010 at 14:36:12:
Kind of a strange question :-O but I"ll offer my two cents, I"m not sure how old you are but automotive catalysts were started in the early 70s and about the same time unleaded gasoline was discontinued later came fuel injection vs carburation which took on many forms until todays EMPI with total fuel control. Most gas type tractors were exempt from most EPA rules. Back to the original question most older tractors burned leaded fuel to lubricate valve guides and that was remedied in the mid 70s and it used to be you wanted the exhaust pipe stack to burn to leave a gray to white deposit on the inside which meant you had things set right if not it was a gray charcoal color which meant it was either set rich or just needed a heavy load to clean it out so to speak. The smell really had to do with a combination of the air and fuel screws and heat so if it bothered some you would need to make constant adjustments which wasted a lot of time and with gas being cheap in those days it wasn"t an issue knowing that later in the year the old girl would be on the plow or some hard pulling tool to do the cleanout. IMHO
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