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Posted by steve porter on Wednesday, July 12, 2017:

I have a 1962 b414 diesel that was running good last year but started losing power and smoking. Had to keep using the tractor out of necessity so tolerated it but it gradually go worse and this hay season really had power loss and terrible diesel fumes. So I replaced the injectors with new ones following a diesel mechanics advice. The #4 injector hole where it sprays into the cylinder was completely closed with carbon so cleaned it and other ones. Tractor fired up but still smokes rich and still lacking power. Tested each fuel line at injectors and when losened each affected motor performance. Checked fuel line return from filter to fuel tank and it was clear. Ran motor with return line unhooked and running into a jar and had fuel flow so assume that means ball valve on return line is working. Does anyone have any advice on what to do next? Also, the fuel lift pump has been leaking fuel and oil when running, could that be affecting things. Have tightened as much as I dare. What are the symptoms of that going bad. Please help cause I miss and need my good ol b414.

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