2015 etecs port side running warm

[Jeff79Sceptre]

Love the etecs. Last year I bumped a sandbar with the most coarse sand I think I've ever seen. Alarm went off and I idled home on 1 motor. Took thermostats out and they were full. I flushed every direction possible and still the port has always been 7-10 degrees hotter then the starboard. So this weekend port side runs hot again. Only at a certain rpm. I pulled foot today and found sand from that same sandbar. Pump looked ok but the housing was grooved. I'm upgrading to the chrome housing. Motors have 270 trouble free hours. However I think 3 years no maintenance is a stretch. Freshwater yes, saltwater no. I ended up breaking 2 bolts. Now to wait on parts.