Using the Neilsen CT1848 Bde3500e diesel generator is quite straightforward. First, make sure there's enough diesel fuel in the 15 - litre tank. Then, use the recoil start to get the generator going. Once it's running, you can connect your devices to the appropriate outlets, either the 230V AC or the 12V DC. When using the generator, keep it in a well - ventilated area to avoid carbon monoxide buildup. Don't overload it; the rated power is 3 KW, so make sure the total power of the connected devices doesn't exceed this. For maintenance, regularly check the oil level in the engine. Also, clean the air filter periodically to keep the engine running smoothly. Store the generator in a dry place when not in use to prevent rust and damage. If you have any questions, refer to the generator Bde3500e manual.