12V 125A NEW ALTERNATOR YANMAR 2YM15 3YM30 3JH 4JH 128990-77250
3YM30, 3YM30AE. IT HAS THE FULL SIZE 125A WINDINGS (NOT THE SMALLER 80/105A WINDINGS AS ON THE HITACHI/PRESTOLITE TYPES BEING SOLD ELSEWHERE). THE NUMBERS LISTED ABOVE ARE MARKED ON YOUR STARTER/ALTERNATOR.