The picture you have posted is the IR air starter that has been around for about 25 years. I'm not sure what happens to them, but when there is frozen moisture in them, instead of turning, they just blow out of the exhaust. Depending on how cold it is, a few minutes with a heat gun like you use for heat shrink fixes them. This probably wouldn't be that much of a hardship with a truck you tinker with all the time. But for our bulk fleet, we went back to 42mt Delcos. We are looking at the new gear reduction Leece Neville starters. They are supposed to weigh half of a Delco.
