Part: oil pump oiler with worm drive gear and hardware;

Part #s 504 81 10-16, 504 02 52-01, 504 02 53-01, 504 81 10-14, 725 53 25-55, 504 06 00-01, 740 42 14-00, 504 81 10-15, 504 21 00-12, 504 15 05-04

Condition: good used/working shape

Fits: Jonsereds 49 sp, 521ev, 52, 52e and others