> Because it has a 90hp motor. That just exists to crank the _actual_ main motor at 1000hp+ Also known as a "Pony" motor. Other heavy equipment such as large C

> Because it has a 90hp motor. That just exists to crank the _actual_ main motor at 1000hp+ Also known as a "Pony" motor. Other heavy equipment such as large Caterpillar D series bulldozers often have these just to start the prime mover. Also a lot of these machines probably have hellish MPG, as low as 4-10 MPG, even the trucks.