F100 overheating

[scallawah]

new thermostat,new impeller.we made two fishing trips and was ok.On our third trip the engine began to overheat.We check the water from the tell tale and it was peeing ok.

i'll appreciate any possible suggestion.

Dave

[boats.net]

Probably need to recheck water pump, take a close look at housing to see if damaged or if stainless steel cup has rotated in housing.