Posted by athol carr on February 09, 2016 at 20:06:32 from (219.89.237.128):
In Reply to: up draft carbs. posted by F.E.Bear on February 09, 2016 at 18:43:44:
I think that the F-12 etc tractors got downdraft carburetors because the engine designers did not leave enough room to get the spark plugs between the valve push-rods. Hence the spark plugs are on the other side of the engine under the manifold. With the spark plugs there an updraft carburetor was not possible if one needed access to the plugs, so a downdraft carburetor together with fuel pump was fitted. A curse on a gasoline only tractor if the carburetor is dry, it takes quite a bit of cranking to get enough fuel into the carburetor for starting.
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Today's Featured Article - Diagnosing Engine Difficulty - Diesel Tractors - by Staff. The following suggestions are listed for your assistance. You can make simple adjustments on your tractor that will improve its operation and save you the time and expense of hiring someone to do it for you. Always make one adjustment at a time, and if the adjustment made does not improve the condition, return to the original setting before proceeding to the next adjustment. Hard Starting Cold air temperatures. Insufficient fuel.
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