The Mercury Marine serial number 0R733218 is 4 Stroke 25 EFI (3 CYL.)(4-STROKE) engine that’s part of the outboard model 1A25413EL. It was produced in 2006. The engine displacement s are either 30.4, 32.1, or 45.6, and the horsepower ranges from 25, 25EFI, to 30EFI. The engine belongs to the serial range and catalog [0R106999 & Up] – USA – Cat.# 90-898126006. Related components are listed below.