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Tractor Talk Discussion Board

Ford 861 losing power


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Posted by lilnoki on May 12, 2008 at 20:30:11 from (69.58.166.225):

I have a Ford 861 gas which I"ve had for several years. At first it was losing some power and running rough. My neighbor mechanic worked on it and found a blown head gasket. He cleaned up the valves and installed a new head gasket-everything was fine for a few years. The last time I used it last fall it was not sounding good again, and got to the point over the winter where I could not even use it. Compression tested out around 150 on all cylinders. Went through the points, plugs, and wires and all look good. Finally poured some Marvelous Mystery Oil in the gas and oil, let it sit and run sputting for a while until it suddenly let out a few good sputts then cleared up. Seems to have normal power again. However, I seem to go through something like this every now and then. It always seems like the exhaust smells like gas, and the exhaust blows very black on the draw bar. After a short while the plugs always look black as coal and covered with carbon. What"s wrong - valves, carburator, timing? My mechanic moved away. I like working on things myself but I"m no mechanic. Any thoughts ?? Thanks for your help.


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