Bits-n-Pieces

When an impeller fails be sure to find all the loose parts or risk having them clog narrow passageways deeper in the cooling system. You might not notice a problem, but then next summer when seawater temperatures rise and you’re bucking a head sea trying to make it home before the weather turns worse, a missing impeller part might provide just enough restriction to overheat the engine. Piece together the offending impeller like a 3-D jigsaw puzzle then check for missing parts between the seawater pump and heat exchanger — or better yet, change that impeller annually and avoid the problem all together.