Buy Engines

We are looking for a quantity of the following engines: Can be cores 1) catapillar1200 RPM engines (can be d or g 379,398,399 etc. ) 2) ge 752 e8 locomotive engines (traction motors) Can be "series" or "shunt" type. Prefer "series" but will look at "shunt" 3) 6ea. Marine engines cat 3516 b. We need them for the propulsion of tugboats.