We have a 2cylinder Farymann Marine Diesel
R30M that was probably built in the late 70's early 80's. We are having trouble finding the correect impellers for our pump. We have been told it is a Jabsco
2620 pump but no where is this brand written on the pump - only a number (1R1204), but this is difficult to make out. The previous impellers look like they had been modified. The dimensions are: 2" diameter, 3/4" width, and 1/2" shaft with a keyway drive. ANY HELP would be so appreciated as we haven't been able to move our boat all season!!