Subaru Robin diesel generators use four-stroke-cycle, single- cylinder Hatz diesel engines. The RGD3300H uses a 6.8-hp engine and has a rated output of 3,000 watts. The RGD5000 uses a 9.9-hp engine and has a rated output of 5,000 watts. Both models have electric starters with recoil backups. Both also feature a 129-volt, 30-amp “twistlock” receptacle and 120/240 -volt, 20-amp twistlock receptacle.