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I will try to be brief but have a lot to cover. Just overhauled 656G. Polished crank, new main and rod bearings. New piston and sleeves. Oil lite blinking at low idle. Put gauge on it and found to be around 6 pounds. Order and installed new oil regulating poppet and spring. Still low. Ordered and installed new oil pump. At 1600 rpm pressure is 20 lbs and drops as it gets warmed up. Using IH SAE 30 oil. I am stumped. Took pan back off and plastic gauged one rod and one main. Both checked out good. Runs about 6 lbs at idle. Ran with valve cover off and drip seems normal. HELP