James, if you have a 149 then you don't have that version of the deck subframe as it is for a narrow frame Cub Cadet. You should have this one, it's the proper deck subframe for a 149 with a 44" or 50" mower deck. If this is the one you have, then the spring is part number IH-59691-C2. Please note that the spring is slid onto the shaft that has the pulleys.
It is possible that you have this one, although it's for the 38" deck. If this is what you have then the spring is part number IH-489607-R4
![38248.jpg 38248.jpg](https://cdn2.imagearchive.com/ihcubcadet/data/attach/105/105675-38248.jpg)
It is possible that you have this one, although it's for the 38" deck. If this is what you have then the spring is part number IH-489607-R4
![38249.jpg 38249.jpg](https://cdn2.imagearchive.com/ihcubcadet/data/attach/105/105676-38249.jpg)