The Farman 3650W generator has the Farman OHV engine ( max-pro series) that provides longer life/higher performance/lower maintenance. The engine is cast iron sleeved (cis) for long durability with automatic low oil shutdown (Los) protection. The conveniently located multi-featured control panel has a Farman custom designed outlet cover that protects outlets from dirt, dust, & debris. For less re-fueling, this generator has the largest tank in the industry for extended run-time with a built-in tank Gauge for convenience. The P03611 also has a quiet (whisper Series) muffler. The durable, compact tubular roll cage frame design is built for years of Use. Just add gas! Everything you need comes standard in the box.