I blew a power head six weeks ago because of the Welsh boat ramp. The dealer told me that the thermostats were blocked open due to trash and tiny pebbles which didn’t let the engine warm up before I got on plane. The pistons need to swell before you head out. Once the new power head was installed he set up my gauges to show the engine temp and taught me how to clean the thermostats. Over the past month of fishing different lakes I have had to clean them five times.
I understand what y’all are describing but it amazes me that in so many years of fishing, often idling through some really shallow water and often hitting bottom, that this problem has never happened to me. Maybe it’s the high RPM “power loading” when putting boat back on trailer that causes the problem?