OK, first, select the locomotive in Content Manager (30ng 2-6-2). Right click on it, then 'View dependencies', then 'View in main list'. You should see an asset that looks like an engine spec - in this case, '30in 2-6-2 enginespec'. Right-click on it, 'Edit', "Edit in Explorer'. In the explorer window that opens, double-click on the config.txt file.
Find the line that looks like:
Change the 250 to 2000 or so. Save the file; close the explorer window.
Back in Content Manager, right-click on the enginespec, 'Edit', then 'Commit'.
See if that helps?