... narrow trenches and along foundations, walls and abutments Special for backfilling the trench,building a new highway, resurfacing ... Heavy-duty shock mounts reduce vibration to the upper engine and handle7) Throttle control is available as optional8) ... available as optional9) Using different pentrol engines for special demand. ModelMS90-1 Engine Air-cooled, 4-cycle, single cylinderEngine TypeDiesel ...