Why water well drilling rigs have trouble starting and black smoke from the exhaust pipe

Why is it difficult to start the rig and why is there black smoke from the exhaust pipe?

Difficulty in starting the engine and a lot of black smoke from the exhaust pipe are the result of incomplete combustion of diesel fuel.

① Poor quality of diesel fuel

② air intake is not smooth, air filter clogging.

③ Injector timing adjusted too early.

Injector needle valve sealing is poor, there are oil dripping and leaking phenomenon.

⑤ Injector pressure too low.

⑥ Injector pump oil supply too large, combustion deterioration.

⑦ Low cylinder pressure, poor atomization.

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