[spareparts]

ferm, if thats an MPI type engine, check the t-fitting that splits the outgoing water to the risers, on a bravo or inboard, the t-fitting is open, on alpha applications, they put a restrictor in the t-fitting to keep the water in the engien at low rpm, had an engine in hte past that didn't come with the restrictor, no one knew about them, made the temp gauge jump like yours, took me forever to figure it out, the merc rep didn't even know there was a restictor in there till he talked to engineering, one of those lessons I won't forget. All they do to identify an alpha t vs. a bravo t is to slip an oring over the fitting indicating it has a restrictor in it.