Yamaha Lower Unit Assembly - LF250 - 6P3-45300-21-8D - See Description For Applicable Models MerCruiser-5-7L--6-2L-MPI-MIE-2019 On a triple-engine boat

On a triple-engine boat

2 MPI with closed cooling (s/n 0W690000-1A091517)

accidental pulling

It fits MerCruiser engines with engine-mounted sea water pumps that use a plastic housing

ORB Fitting Kit

Yamaha Lower Unit Assembly - LF250 - 6P3-45300-21-8D - See Description For Applicable Models MerCruiser-5-7L--6-2L-MPI-MIE-2019 On a triple-engine boatYamaha Lower Unit Assembly Gearcase Component 6P3 45300 21 8D Overview On these larger Yamaha motors, the lower unit is where all that power finally hits the water. Ive worked on enough of them to know that when something feels offnoise, vibration, or slipit usually traces back here. Swapping in a complete assembly like this takes the guesswork out and gets everything back to factory feel. Its the kind of fix that brings your confidence back the