During ship maintenance, what precautions should be taken when replacing Marine Spark Plugs?

In ship maintenance, the following matters need to be noted when replacing Marine Spark Plugs:

1. Preparation stage
Before replacement, be sure to confirm the model and specifications of the required spark plugs to ensure that they match the ship's engine. Prepare appropriate tools, such as spark plug wrenches, sockets, screwdrivers, etc., to smoothly remove and install spark plugs. Before replacing spark plugs, make sure that the engine is turned off and the power is disconnected to avoid electric shock or damage to engine components.
At the same time, wear protective gloves and goggles to prevent hand injuries or eye injuries from flying sparks.

2. Disassembly stage
According to the layout of the engine and the location of the spark plugs, accurately find the spark plug that needs to be replaced. Use a spark plug wrench or socket to rotate the spark plug counterclockwise until it is removed from the engine. Be careful not to use excessive force to avoid damaging the spark plug or engine components.

3. Inspection stage
Observe the removed spark plugs and check whether their electrodes are worn, whether carbon deposits are serious, whether the ceramic part is cracked, etc. If a serious problem is found with the spark plug, a new spark plug should be replaced in time. Use compressed air or appropriate cleaning tools to clean the carbon deposits and debris in the spark plug mounting hole to ensure that the new spark plug can be installed smoothly and work properly.

IV. Installation phase
Apply a thin layer of lubricating oil to the ceramic part of the spark plug to reduce friction and wear during the installation process. Align the new spark plug with the mounting hole, use a spark plug wrench or socket, and rotate the spark plug clockwise until it is fully tightened.
Be careful not to over-tighten to avoid damaging the spark plug or engine components. After installation, use tools such as a flashlight or endoscope to check the installation quality of the spark plug to ensure that the spark plug is correctly installed and tightened in place.

V. Testing phase
After ensuring that all parts are correctly installed and tightened, start the engine for testing. By observing the operation of the engine and the ignition of the spark plug, judge whether the spark plug is working properly.
If the spark plug is found to have problems such as poor ignition or unstable operation, it should be stopped in time and the cause should be checked.

6. Other precautions
Replace spark plugs regularly according to the usage of spark plugs and the maintenance requirements of the engine to ensure the normal operation of the engine. The replaced old spark plugs should be properly handled to avoid environmental pollution caused by random discarding.
During the storage and preservation of new spark plugs, attention should be paid to moisture-proof, dust-proof and corrosion-proof to ensure their performance and life.