16020-ZW5-000 Honda COVER (Honda Code 6010078).

Maintenance of the spark plugs is required in order to achieve the following benefits:
Normal fuel consumption
Normal level of emissions
Maximum service life of the spark plugsThe service life of the spark plugs is affected by fouling due to deposits from the oil and by peak voltage. Maintenance of the ignition system is also affected by voltage. Higher voltage is required by higher inlet manifold air pressure and a higher compression ratio. Higher voltage reduces the service life of components such as spark plugs, wires, and transformers.Removing the Spark Plug
Altronic Ignition System
Note: The Altronic ignition system has a transformer which is mounted separately from the spark plug.
Illustration 1 g00837559
(1) Wire for the secondary circuit
(2) Transformer assembly
(3) Boot
(4) Seal
(5) Spark plug
Pulling on the wiring harness may break the wires. Do not pull on the wiring harness.
Disconnect wire (1) from transformer assembly (2). The wire may break if you pull on the wire.
Remove boot (3) and the extension.
Pressurized air can cause personal injury. When pressurized air is used for cleaning, wear a protective face shield, protective clothing, and protective shoes.
Ensure that the area around the spark plug is clean and free of dirt and debris. Thoroughly remove any debris. Use compressed air. The maximum air pressure for cleaning purposes must be below 207 kPa (30 psi). A nonmetallic brush can also be used.
Use a deep well socket with an extension in order to remove spark plug (5). After the spark plug has been loosened, remove the spark plug by hand in order to detect problems with the threads. After the spark plug has been removed, discard the used spark plug gasket. If the spark plug resists removal by hand, apply penetrating oil to the threads. To help the oil penetrate the threads, use the wrench and turn the spark plug back and forth until the spark plug is loose.
Do not use a thread tap. A thread tap will remove metal unnecessarily. The threads could be stripped and the spark plug adapter could be damaged.
If the spark plug cannot be removed by hand, clean the internal threads with the 9U-7511 Spark Plug Seat Cleaner. This tool scrapes debris from the seat and from the threads in the cylinder head. Be sure to clean any debris from the cylinder.CSA Ignition System (Altronic)
Note: The CSA ignition system is equipped with an integral transformer. The transformer screws onto the spark plug. The transformer and the spark plug are removed separately. The transformer and the spark plug are installed separately.
Illustration 2 g00798357
(1) Wiring harness
(2) Boot
(3) Transformer
(4) Spacer
(5) Spark plug
Unscrew wiring harness (1) from the threaded connector.
Remove boot (2).
Unscrew transformer (3) from spark plug (5) in order to remove the transformer.
Pressurized air can cause personal injury. When pressurized air is used for cleaning, wear a protective face shield, protective clothing, and protective shoes.
Ensure that the area around the spark plug is clean and free of dirt and debris. Thoroughly remove any debris. Use compressed air. The maximum air pressure for cleaning purposes must be below 207 kPa (30 psi). A nonmetallic brush can also be used.
Use a deep well socket with an extension in order to remove spark plug (5). After the spark plug has been loosened, remove the spark plug by hand in order to detect problems with the threads. After the spark plug has been removed, discard the used spark plug gasket. Note: Ensure that you keep copper spacer (4) that is installed between the end of the transformer and the top of the hex on the spark plug.If the spark plug resists removal by hand, apply penetrating oil to the threads. To help the oil penetrate the threads, use the wrench and turn the spark plug back and forth until the spark plug is loose.
Do not use a thread tap. A thread tap will remove metal unnecessarily. The threads could be stripped and the spark plug adapter could be damaged.
If the spark plug cannot be removed by hand, clean the internal threads with the 9U-7511 Spark Plug Seat Cleaner. This tool scrapes debris from the seat and from the threads in the cylinder head. Be sure to clean any debris from the cylinder.Fairbanks Morse Ignition System
Note: The Fairbanks Morse ignition system has an integral transformer that screws directly onto the spark plug. The transformer and the spark plug are removed as an assembly.
Illustration 3 g00837582
(1) Wiring harness
(2) Boot
(3) Transformer
(4) Spark plug
(5) Spacer
Disconnect wiring harness (1).
Remove boot (2).
Remove transformer (3) and spark plug (4) as a unit.
Remove the spark plug from the transformer. Note: Ensure that you keep copper spacer (5) that is installed between the end of the transformer and the top of the hex on the spark plug.Inspecting the Spar