Homelite made a trash pump with the same motor setup (the boxy tank at the bottom with the oil measuring cup inside) Runs like a typical 2-stroke, might need to clean/replace the points and go through the carb. The key thing- does it put out juice? If not, the field coil may need to have the brushes cleaned and be reflashed. If not, you may not be able to fix it. If it runs, try to get electricity from it. If it puts out power, only then bother going through the engine.