Working on cooling system for twin Volvo Penta AQAD 40B engines missing 1 fitting, R.H. is 4.25" long, x 1.25" O.D. x 1.5" O.D.tried to order part # 845443 (coolant pipe) but wrong part came L.H., also tried # 838559, anyway can't seem to find a good break-down parts manual, other picture is of...