Table 2-2. Generator Set Troubleshooting (Cont) Malfunction Probable  cause Corrective   action 3. Engine runs when START - _.  Defective  stop- a a.  Replace  defective  relay  Kl  in STOP-RUN switch is held run relay (Kl). generator  control  assembly in START position, but (fig 3-3 and 3-5). stops when switch is put in RUN b. Defective   overvolt- b.  Test  overvoltage  relay.  Replace — age relay (K2). defective  relay  (para  8-6). c. Defective  fuel  level c.  Replace  defective  relay  K8  in — relay the special relay assembly (para  8-6). 4. Engine runs rough a. Incorrect  timing. a. Time engine as illustrated in — — figure  14-25. b. Defective fuel in- b. Check fuel injection pump — jection  pump. (para. 14-44). Repair or re- place  fuel  injection  pump (para 14-44 and 14-45). c. Nozzle  injector c. Repair or replace nozzle — assembly mal - injector   assemblies   (para function. 14-38  thru  14-41). d. Sticking   valves. d. Check valves and springs (para. 14-77). Repair or replace valves  (para  14-77  thru  14-78). e. Blown cylinder head e. Replace cylinder head gasket gasket. (para  14-79.  ) f. Defective  cylinder f. Replace cylinder sleeve (para — sleeve. 14-85  thru  14-87). g. Defective piston. g. Replace piston assembly (para — 14-81  thru  14-83). h. Broken or bent h. Inspect valve operating mech- — push  rod. anism.  Replace  defective  push rod  (para  14-77). 5. Engine  runs  erratically a. Improper  fuel a. Time fuel injection pump or  misfires timing. (para 14-4 9). b. Improper  governor b.  Adjust  governor  (para  7-8). adjustment. c. Defective  fuel  in- c. Inspect fuel injection pump, jection  pump. Replace or repair (para 14-49, 14-44 and 14-45). d. Deleted e. Worn camshaft bear - e.  Replace  camshaft  bearing ings. (para 14-85 and 14-87). 6. Engine  runs  but  fails  to a. Improper  governor a. Adjust governor (para 7-8). reach rated speed adjustment. Change 5 2-11