Dual Flex Marine Mount - DF-4420 Series - DF-4428-4 The Dual Flex DF-4420 Series of heavy duty mountings is a twin stud double mount designed principally for diesel engines in excess of 2,800 lbs up to 5,600 lbs in weight. These mounts are generally used on the “heavy (marine transmission) end” of the engine along with DF-4400 Series mounts on the front of the engine. Durable oil and fuel resistant elastomer element. Low profile mount - requires only 3 3/8” minimum clearance from casting base to top of leveling nut. Fail safe design - bottom pad prevents excessive impact. Easy installation with full 1” threaded studs for vertical height and slotted casting for 3 3/4 horizontal adjustment. Mounts come complete - furnished with three nuts: leveling, locking and secondary lock. Aluminum base cast with 1/2” slotted mounting holes for 1/2” bolts or lag screws on 9” centers. All steel parts are zinc trivalent plated for corrosion resistance. Available in four size ratings dependant on engine/powertrain package weight. Engine Weight Suggested With 4 Point Mountings 2,800 to 3,600 lbs. DF-4425-4 3,600 to 4,400 lbs. DF-4426-4 4,400 to 5,000 lbs. DF-4427-4 5,000 to 5,600 lbs. DF-4428-4