Well...
About 5 minutes after blast off this morning it happened. Started losing power and then the rattle of a dead cylinder/bearing. Fished my way back to the ramp, 6 hours. Not a single bite! Just a little more salt for the open wound. Got it home and pulled the plugs. #4 was dry and powdery white.
I think I might just repower and part out my J150GLEIS.