Lincoln Service Parts 2 › Lincoln Electric 9SS21500-4 TACH SENSOR REWORK S21500-4 Lincoln Electric 9SS21500-4 TACH SENSOR REWORK S21500-4 Sale Price: $139.34 Original Price: $160.24 TACH SENSOR REWORK PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! TACH SENSOR REWORK PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1