This is optional service of jet pump unit.
Check impeller condition and gap between housing, this is very important things of jet ski's performance. Poor condition of jet pump unit doesn't get good run. If impeller and housing been damaged, in many cases these can be repair. Also we dismantle and check bearings and seals condition too.
Usually bearings and seals replace at that point.
We recommend this service every 100hr for avoid broken jet pump unit cause by water get into bearing. or fatigue failure of bearing .Also this avoid to big damage of motor.
I will explain soon about that big damage of motor cause from pump damage
