I need to purchase new regulators for my 1993 Mariner 200 EFI. I found the parts on the web, but there's a few variations in the OE# under the same P/N. The P/N is 194-5279 and the OE#'s are 815279T, 815279T 2, 815279T 3, 815279T 4, 815279T 5. Does anyone know the differences in the OE#'s and...