Engine flushing kit 16841Q02 is for use with 4-5hp 2-stroke Mercury or Mariner outboards, Mercury or Mariner 2.5-3.5hp (F2.5, F3.5) 4-stroke outboards, 4-6hp 4-stroke outboards (serial No. OR411837 and lower) and 8-9.9hp 4-stroke outboards (2005 and newer). Only for use when engine is not running.
Easily screws in to flushing port on engines
Do not use when engine is running
Flush outboards to prevent corrosion to internal engine passages
Use to flush invasive species deposits from internal engine passages