green farmer,
i really don't know how long my heat riser has been stuck in the closed position, but if it has been a long term issue that i haven't noticed before, it could explain a mysterious hard starting after warm-up in the summers here in arizona.
going to pull the manifolds off tomorrow and get the valve freed up and operating properly so we will see if it makes a difference.
sheesh denny... them engineers don't know nuttin'
