I have a 2004 model # E225FPLSRB. On the upper water hose connection on the VST is a white plastic barbed nipple threaded into the VST housing. I know it s/b stainless. The VST is part number 5004429. Anyone ever hear of a repair using a plastic part? The engine is sometimes difficult to restart after running for some time. I’m wondering if water could be leaking into the fuel due to this setup.