Based on no observed tell-tale discharge when the motor slowed down, but pump seemed to be working normally later on the muffs, I’d say you momentarily sucked up a plastic bag or some weeds. I recently had a similar experience when I sucked up some weeds while maneuvering around the dock area. Noticed temp gauge climbing so shut it down before hot alarm went off. I’d take it back out for another run and see what happens.
Bob
1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1957 Evinrude 3022
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20
1982 Evinrude 25hp
“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."
