I would expect many folks, such as novices like me, would not expect white smoke to come from the prop area of an outboard during out-of-water testing with water and "muffs". After replacing the impeller and other water pump parts, as well as parts in the lower gearcase of my 1976 Johnson 15hp outboard, I hooked up the hose and "muffs" and did a few starts and stops. I was confident in the job I'd done, but when I saw white smoke come from the prop area I promptly stopped, fearing damaging the engine. Please help me to understand whether or not I should reasonably expect such smoking to occur, or if, perhaps I should not be so confident in the job I had done. Many thanks for any helpful responses.
