1. Online Parts Retailers: Websites like RockAuto, AutoZone, Advance Auto Parts, etc., often have diagrams as part of their parts listings. Search for "1989 Mitsubishi Colt carburetor" and look at the parts diagrams associated with carburetor rebuild kits or replacement carburetors. The diagram might be a small image within the part description.
2. Mitsubishi's Official Website (unlikely): Mitsubishi's website is more likely to have diagrams for newer vehicles. It's worth a shot, but don't expect much success for a model this old.
3. Haynes or Chilton Repair Manuals: These manuals are readily available online and in auto parts stores. They generally contain detailed diagrams of the carburetor and its components. Search for "1989 Mitsubishi Colt Haynes manual" or "1989 Mitsubishi Colt Chilton manual".
4. Online Forums: Search Mitsubishi-specific forums or car repair forums (like Reddit's r/MechanicAdvice). Mention the engine size (e.g., 1.5L) along with the year and model. Someone might have a scan or link to a diagram.
Important Note: Before you start searching, double-check that your 1989 Mitsubishi Colt actually uses a carburetor. It's much more likely to have electronic fuel injection. Confirming this is crucial, as trying to find carburetor parts or diagrams for a fuel-injected car will be fruitless. Look at the engine bay – a carburetor is a relatively large, visible component.