That control valve is shot, leaking from the body. I'm pretty sure it was always set up this way other than the 2 ports I have plugged that ran to the lift cylinder for the snow blade. I pulled it apart and cleaned it up with new orings but the spool was badly corroded and pitted. I think maybe this allowed the fluid to push past the lands and cause the leaking. Is it possible that the pitting on the spool is allowing the valve to flow both ways and fight itself? It does make sense to me now that I can find the pressure side of the pb plate and plumb it back to the tank. I'm still not understanding how the valve works when plumbed up in its current configuration. If I were to buy a new control valve and add the additional power beyond plug, how does it function without plumbing a hose back to the tank.
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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