Yamaha EF6600 5.5 KVA is a brushless generator, it is a typical type of generator that doesn't need carbon to generate energy which means it needs no to little maintenance and it is suitable for long-term use. This generator has an auto decompressor. Yamaha EF6600 5.5 KVA has a voltameter and auto choke system. This generator also has a low noise level and with an oil alert system, the generator lets you know about the maximum oil levels to avoid any seizure.