There are many reasons why an engine may not start, and you will save time and effort by following the logical sequence of checks listed here. Systematically performing each check step by step and moving on to the next increases the chances of finding the fault.
Remember that most faults are caused by a lack of or insufficient fuel in the injectors or a weak battery charge that does not allow the diesel engine starter to develop sufficient speed. Therefore, first of all, check the presence of fuel in the tank, the condition of the tank safety valves (are they open?), the condition of the battery and, if a battery switch is installed, whether it is in the "ON" position.
Troubleshooting table
Diesel engines do not have the problems associated with an electric ignition system. However, there are still many reasons why a diesel engine will not start. Simply put, a diesel engine needs fuel, air, sufficient compression in the cylinders, and a high enough crankshaft speed in order to start. Many factors, either individually or in various combinations, can prevent one or all of these basic requirements from being met.