Siyang 380J-3 - User Manual

Questions and Answers

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David MckenzieAug 7, 2025
Why Siyang Engine has black smoking from exhaust?
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  Carol SmithAug 7, 2025
  If your Siyang Engine exhaust is producing black smoke, it could be due to several reasons. The engine might be overloaded, in which case you should reduce the load. Faulty fuel injectors can also cause this; consider replacing them. Poor fuel quality is another potential cause, so change the fuel to the specified type. Combustion may be incomplete, so you should check the injector, fuel injection advance angle, cylinder gasket, and cylinder compression pressure, among other things.
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Jennifer PattersonAug 13, 2025
Why is my Siyang Engine overheating?
- S
  Stephanie SellersAug 13, 2025
  If the Siyang Engine is overheating, it could be due to several reasons. The coolant water temperature might be too high, so add water coolant. The cooling water pump might be defective, requiring repair or replacement. Lube oil temperature could also be too high, so fill or drain the lube oil. Also, the engine may be overloaded.
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William WellsAug 18, 2025
What to do if Siyang Engine has low lube oil pressure?
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  eddielongAug 18, 2025
  If the Siyang Engine has low lube oil pressure, it could be due to several reasons. The lube oil level in the oil sump might be too low, so fill it to the correct mark. Leaks in the lube oil pipe can also cause this, so tighten all connectors. An obstructed lube filter should be replaced. If the lube oil is too thick, replace it with oil that meets the required specifications. A defective pressure sensor or lamp should be replaced. Finally, if the gear pump is worn out and the clearance is excessive, replace the gear pump and adjust the clearances.
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Lindsey EdwardsAug 25, 2025
What to do if Siyang Engine over speed or override?
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  vegaamberAug 25, 2025
  If a Siyang Engine is running over speed, it could be due to several reasons. A governor malfunction requires you to stop the engine and repair it immediately. If the control bar of the fuel injection pump is stuck, stop engine and repair immediately. If the fuel supply of the injection pump is too large, stop the engine and readjust fuel pump delivery. If oil gets into the cylinder too much, stop the engine and check and repair.
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christiankristinOct 31, 2025
Why is my Siyang Engine difficult to start?
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  Dr. Melissa FernandezOct 31, 2025
  If the Siyang Engine is difficult to start, several factors could be at play. It might be due to obstructed fuel filters or pipes, which can be resolved by cleaning them. Air trapped in the fuel system can also cause this issue; drain the air and tighten all fuel pipe connectors. An incorrect fuel injection advance angle requires adjustment to the specified settings. Similarly, incorrect valve clearance should be adjusted as needed. A battery that isn't fully charged or has poor wire connections needs to be fully charged, or the connections tightened. Insufficient fuel in the tank or poor injector spray means you should fill the tank or adjust the injecting pressure. Finally, low cylinder compression pressure indicates the need to check and potentially change the piston ring or cylinder li...
D
DmitriiApr 9, 2025
Fuel pump cz380q-141000 adjustment steps/pricedure.

Summary

Introduction

Engine Set Description

Details the various components of the marine diesel engine set.

Main Engine Structure

Fuel System

Explains the components and function of the engine's fuel system.

Lubrication System

Describes the engine's lubrication system, including oil flow and addition.

Cooling System

Details the forced circulative water cooling system and its components.

Electric System

Outlines the composition of the engine's electrical system and its components.

Gearbox

Provides information on gearbox types and reduction ratios.

Electrical Diagram

Presents the electrical diagrams for the engine set.

Starting Precautions

Lists essential safety measures to take before starting the engine.

Checks Before Starting

Details critical checks to perform before operating the engine.

Engine Operation

Starting

Step-by-step guide for starting the engine, including precautions.

Starting by Spring Starter

Instructions for starting the engine using a spring starter mechanism.

Operation

Guidelines for operating the engine under normal and emergency conditions.

Stopping

Procedures for safely stopping the engine and associated actions.

Routine Maintenance

Initial Attention

Important checks and actions during the initial operating period.

Routine Maintenance Periods

Outlines maintenance tasks and their recommended intervals.

Lubrication Oil Specification

Specifies the types and grades of lubricating oil for different temperatures.

Gearbox Oil Specification

Details the specifications for gearbox oil.

Main Spanner Torque Settings

Lists torque values for critical engine fasteners.

Cylinder Head Bolt Tightening Sequences

Provides the correct sequence for tightening cylinder head bolts.

Lubrication Oil Level Check

Instructions for checking the engine's lubrication oil level.

Lubrication Oil Change

Procedure for changing the engine's lubricating oil.

Alternator Belt Tension

Details how to check and adjust alternator belt tension.

Gearbox Oil Check

Instructions for checking the gearbox oil level.

Priming the Fuel System

Steps for priming the fuel system after maintenance or fuel depletion.

Drain the Coolant

Procedure for draining the engine's coolant.

Changing Fuel Filter Element

Steps for replacing the fuel filter element.

Idling Speed Adjustment

Guidelines for adjusting the engine's idling speed.

Valve Clearance Adjustment

Specifies valve clearance values and adjustment.

Starting and Running Engine in Lifeboat Rig

Procedure for starting and running the engine in specific lifeboat scenarios.

Electric System Precautions

Important safety precautions when working with the electric system.

Troubleshooting

Difficult Engine Starting

Lists causes and remedies for engine starting difficulties.

Insufficient Output

Identifies causes and solutions for insufficient engine output.

Black Smoke from Exhaust

Explains reasons and fixes for black smoke from the exhaust.

Low Lube Oil Pressure

Lists causes and remedies for low lubrication oil pressure.

Engine Knocking

Details causes and solutions for engine knocking sounds.

Engine Overheating

Explains causes and remedies for engine overheating.

Engine Over Speed or Override

Lists causes and solutions for engine over speed or override issues.

Siyang 380J-3 Specifications

General

Brand	Siyang
Model	380J-3
Category	Engine
Language	English