Noticed that my BF 100L lost the telltale stream. Looked all over for the exit point and finally surmised it was coming from the water jacket via a rubber tube fixed to a nipple. Poked around with a wire trying to pry loose any crud. Engine runs cool, but I'm worried when I can't monitor telltale. Is there a chemical I can use to disolve deposits, or will I have to remove the water jacket and manually clean? At this point, having replaced the impeller, I still have no telltale stream. Can anybody help?
