Yes, the DT 530 mechanical engine and the 530e engine of the same year are interchangeable. They are both 530cc engines with the same bore and stroke, and they use the same basic design. However, there are some minor differences between the two engines. The 530e engine has an electric starter motor, while the DT 530 engine does not. Additionally, the 530e engine has a different ignition system and carburetor than the DT 530 engine.
Overall, the DT 530 mechanical engine and the 530e engine are very similar and can be used interchangeably in most applications. However, it is important to be aware of the minor differences between the two engines before making a swap.
