MODEL AFFECTED - 198VX, 519VX, 520VS, 521VX, Z19, Z20, Z21, Z21I, Z22, Z520 - POSSIBLE FUEL LEAK AT ELBOW ONE OR MORE OF THE 90 DEGREEELBOWS ON FUEL SELECTOR VALVE MAY FAIL WHERE HOSE BARB IS PRESSED INTO BODY ALLOWING FUEL TO LEAK INTO FUEL TANK AREA AND BILGE- CHECK FILE OR DEALER FOR SPECIFIC HINS AFFECTED - CUR 2 RECVD - 75 OF 1216 UNITS CORRECTED - 8 INSPECTED UNITS DID NOT HAVE PROBLEM.