so my question (where i think the mechanic got it wrong) is on the log itself; there is 2 holes, does it matter which one is used for the inlet/ outlet? it seems like he got them reversed from how it used to be.I don't think Hardin Marine made headers but I could be wrong. Here's a log plumbing schematic.
glad i read this!You will normally have a high and low fitting in the logs. Water goes in the low fitting and out the top. That way it fills the manifolds up. Most logs have 2 fittings. I'm not certain on the Hardins but I think they were the old Nicson castings with the Hardin name plate in the mold. If so they should have 2 fittings on one end.