New line of generators offers high-quality durable EX overhead cam engines. The units are constructed of heavy-duty steel and equipped with steel fuel tanks. Ranging from 3500 to 7500 watts, they are available in three models: the SGX3500 7-hp EX21 engine, the SGX5000 9.5-hp EX30 engine, and the SGX7500 14-hp EX40 engine. Subaru Industrial Power Products.