What was found
(CAN) ENGINE WAS RECEIVED FRESH FROM OVERHAUL FACILITY WITH THE ABOVE MENTIONED ENG DRIVEN FUEL PUMP & FITTINGS. POST INSTALL GND RUNS WERE UNABLE TO ACHIEVE TAKEOFF POWER. AFTER 2300 RPM FURTHER POWER LEVER ADVANCEMENT RESULTED IN LOSS OF RPM & INCREASE IN MANIFOLD PRESS, INDICATING FUEL STARVATION. UPON INSPECTION WE FOUND THAT THE INLET FITTING TO THE FUEL PUMP WAS RESTRICTED, JUST A PIN HOLE, EITHER THE PART WAS NOT MANUFACTURED PROPERLY, NOT FULLY DRILLED THROUGH, OR IT IS AN UNAPPROVED PART FOR USE AS A RESTRICTED FITTING. IN EITHER CASE IT DOES NOT BELONG ON THE ENG. WE REPLACED THE FITTING WITH THE CORRECT PART & ALL WAS WELL.