DOP27340HU350 Husqvarna 350 Oil Pump Kit With Worm Gear No. 540-05-79-01. This is a high quality aftermarket oil pump that includes the worm gear. Replaces Husqvarna part numbers 503 93 21-01, 503932101, 503-93-21-01, 540 05 79-01, and 540057901.
Please make sure of your part number and the picture seen matches your Oil Pump.