First off I want to thank everyone for the input on my one engine running hot. I think I have resolved that problem. Last night while running the boat at the dock I notice the port motor transmission really making that clanking noise at idle. Kick it up a few hundred RPM and it goes away. So in the quick research I have done this morning I am learning that is a sign the engine may not be running 100% efficiently. I have 8.1 MPI's model year 2002. All electronic ignition. How long should a set of plug wires last. The plugs were just changed but the wires I am guessing are original just like everything else on this boat.