Posted by Ray Fregoe on March 01, 2014 at 13:04:45 from (67.246.93.58):
I have a intake preheater on my UMZ tractor same engine as a Belarus the engine is a d243. The preheater on the intake has two wires on it and a coil valve built into it. One wire heats up the element and the other wire is supposed to open the valve while cranking. My problem is that when there is power put to the valve wire it draws the valve closed instead of opening it to let diesel drip in on the heater. The photo shows the type of preheater that's in the tractor. It acts like the coil is in reverse polarity.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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