Sgt, I also have the same problem and also with my "restored" H Farmall. The engine got new rings and valves 4 yrs ago when I bought the tractor. When I start it up and let it warm up a bit small (very tiny) black liquid spots fall on the tractor. After a few minutes I rev it up to 3/4 throttle and bring it back to idle just to blow the crap out of the muffler. Then I get out the nice soft rag and wipe everything down; the stuff is easy to remove.
Sometimes I just start the tractor and pull out the driveway and go about 1/4 - 1/3 throttle and the stuff always hits me in the face and I get tiny black spots on my shirt. And the spots on shirts are permanent. The problem goes away after I travel about 500 feet.
I've tried to use gas with no alcohol whenever I can but the problem seems to be with me all the time. Of course, adding no-alcohol gas to a tank with leftover regular gas defeats my goal somewhat.
My radiator does not leak, I change oil often, and mostly use the tractor for joy rides and run it full throttle about 1/2 the time just to clean out the exhaust. Even after our spring plow day (tractor pulls a plow for 3-4 hrs) I can start the tractor the next day and those black spots fall out of the sky.
I feel that the spots are water-based, not from raw fuel.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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