I did a water pump unit replacment in my '82 evinrude 55hp. The indicator/tattletale/peehole has great flow. I think the temp sensor may be bad as the alarm goes off, but the Seloc manual says check the thermostat. I cannot find anything that looks like a thermostat housing on my motor. The engine runs great, and after 5-10 min at WOT I pull of the cover and the cylinder heads are hot but not scorching/burning to the touch. I've worked on air cooled VWs and remember the old oil dipstick test...if you can hold your hands on it for a couple of seconds its okay...about 200 deg. It passes that test. Question: Does this older motor even have a thermostat? Manual is useless. I've got a Clymer coming in the mail, which will probably be as useless as the Seloc (which was actually okay for the water pump work).