I searched the MTH website Product Locator page and came up with these three versions of Owner's Manuals. The one with your product number is for a "Pioneer Zephyr" (a Burlington train), but I did find two others with different product numbers for the "Flying Yankee" (a B&M train). Not sure any of this will help you, but it might.
Curious, do you have the box for your product and does it have that MTH part number and name on the box?
Chuck