Ranch mission question

I’m doing the missions for the foreman at the ranch, he wants two motors, I have a stack of 48 motors sitting on the ground where he normally accepts materials, thinking maybe he needs two motors of the exact same liter size, he wont accept them and the mission log doesn’t give any description. Any ideas?

EDIT:

I figured it out by looking at the code for the quest and a vehicle parts .json, he specifically wants an “electric motor” not a large electric motor, not a small electric motor "2 Electric Motors"
I thought i’d post this here in case someone else has the same problem, this should probably be made more specific in the mission dialogue or mission log.

There’s also a slight error in one of the other missions there. Ranch guy asks for 20 of a certain thing, but mission objective says 30, and 30 is the actual number you need.