What is required before cleaning the carburetor in a solution or sonic cleaning tank?

Before cleaning a carburetor in a solution or sonic cleaning tank, complete disassembly of the carburetor is necessary. This thorough disassembly allows for adequate access to all components, ensuring that fuel passages, jets, and other internal areas are properly cleaned and free of debris or buildup.

When a carburetor is completely disassembled, the individual parts can be placed in the cleaning solution or sonic cleaning tank without damaging sensitive components or affecting the cleaning process. This step is essential, as incomplete disassembly might leave residues in critical areas that can affect the carburetor's performance when reassembled.

The other options suggest varying degrees of disassembly or cleaning, which would not be sufficient for ensuring a thorough cleaning process or could risk damaging the carburetor. Therefore, complete disassembly is a vital requirement before cleaning, ensuring that every component receives the attention it needs for optimal function.