I bought this to replace OEM #2088 on our Newmar. 2088 was rated at 2.9 gpm, 4088 at 5 gpm. The pump heads appear to be very similar, the new motor is significantly larger and 4 inches longer. The rubber mount is very flexible. This pump is noisier than the OEM (bigger motor, bigger displacement) but nothing to complain about. The OEM wiring diagram requires the crankshaft to come out of the pump. I spent a few hours looking for the right fittings. Found at West Marine. I can try moving to remove the elbow and maybe make the hammer smaller.
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