TROUBLESHOOTING CHART TROUBLE POSSIBLE CAUSE Low cranking speed 1, 2, 3, 4 Will not start 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22, 31, 32, 33 Difficult Starting 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 24, 29, 31, 32, 33 Lack of power 8, 9, 10, 11, 12, 13, 14, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 31, 32, 33 Misfiring 8, 9, 10, 12, 13, 14, 16, 18, 19, 20, 25, 26, 28, 29, 30, 32 Excessive fuel consumption 11, 13, 14, 16, 17, 18, 20, 22, 23, 24, 25, 27, 28, 29, 31, 32, 33 Black exhaust 11, 13, 14, 16, 18, 19, 20, 22, 24, 25, 27, 28, 29, 31, 32, 33 Blue/white exhaust 4, 16, 18, 19, 20, 25, 27, 31, 33, 34, 35, 45, 56 Low oil pressure 4, 26, 37, 38, 39, 40, 42, 43, 44, 58 Knocking 9, 14, 16, 18, 19, 22, 26, 28, 29, 31, 33, 35, 36, 45, 46, 59 Erratic running 7, 8, 9, 10, 11, 12, 13, 14, 16, 20, 21, 23, 26, 28, 29, 30, 33, 35, 45, 59 Vibration 13, 14, 20, 23, 25, 26, 29, 30, 33, 45, 48, 49 High oil pressure 4, 38, 41 Overheating 11, 13, 14, 16, 18, 19, 24, 25, 45, 47, 50, 51, 52, 53, 54, 57 Excessive crankcase pressure 25, 31, 33, 34, 45, 55 Poor compression 11, 19, 25, 28, 29, 31, 32, 33, 34, 46, 59 Starts and stops 10, 11, 12 KEY TO TROUBLESHOOTING CHART 1. Battery capacity low 31. Worn cylinder bores 2. Bad electrical connections 32. Pitted valves and seats 3. Faulty starter motor 33. Broken, worn, or sticking piston ring (s) 4. Incorrect grade of lubricating oil 34. Worn valve stems and guides 5. Low cranking speed 35. Overfull air cleaner or use of incorrect grade 6. Fuel tank empty of oil (oil bath cleaner) 7. Faulty stop control operation 36. Worn or damaged bearings 8. Blocked fuel feed pipe 37. Insufficient oil in oil pan 9. Faulty fuel lift pump 38. Inaccurate gauge 10. Choked fuel filter 39. Oil pump worn 11. Restriction in air cleaner 40. Pressure relief valve sticking open 12. Air in fuel system 41. Pressure relief valve sticking closed 13. Faulty fuel injection pump 42. Broken relief valve spring 14. Faulty injectors or incorrect type 43. Faulty suction pipe 15. Incorrect use of cold start equipment (if equipped) 44. Choked oil filter 16. Faulty cold starting equipment 45. Piston seizure/pick up 17. Broken fuel injection pump drive 46. Incorrect piston height 18. Incorrect fuel pump timing 47. Open circuit strainer or week strap blocked 19. Incorrect valve timing 48. Faulty engine mounting (housing) 20. Poor compression 49. Incorrectly aligned flywheel housing or flywheel 21. Blocked fuel tank vent 50. Faulty thermostat 22. Incorrect type or grade of fuel 51. Restriction in water jacket 23. Sticking throttle or restricted movement 52. Loose water pump drive belt 24. Exhaust pipe restriction 53. Gearbox or engine oil cooler choked 25. Cylinder head gasket leaking 54. Faulty water pump 26. Overheating 55. Choked breather pipe 27. Cold running 56. Damaged valve stem oil deflectors (if equipped) 28. Incorrect tappet adjustment 57. Coolant level too low 29. Sticking valves 58. Blocked oil pan strainer 30. Incorrect high pressure pipes 59. Broken valve spring -67-