Mariner Magnum tell tale

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Posted by Nat ( on July 06, 2005 at 07:18:30:

I have an early 90's Mariner Magnum 40, 4cylinder, which runs great. I'm going to replace the impeller as a precautionary measure, but here's my question: How long should it take to get a tell tale stream after starting a cold engine? Before the water comes out(12 to 15 real seconds, that seems like a long time), a little bit of exhaust smoke comes out of the tell tale stream hole. Is this normal?

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