Diesel...starts right up. Guessing 1958 from some research. No hydraulic cylinder leaks. All new fluids. Bought 2 years ago for firewood handling on the property. Realized a few months ago it does have a blown head gasket, but I don't have enough knowledge to handle that. Put a bottle of block seal in it and use it rarely and lightly. Need an old backhoe or medium sized excavator instead.