actually .. been wrong before but… looking closely at the film there does not appear to be a drain hole at the bottom of the channels to block ?
Johnson manual shows some on one PH …
I suspect main internal drainage would be out the purge valve since it is the lowest point of the crankcase where fuel would puddle anyway.
I modified my 5.5 and do not recall this concern nor did it affect the performance
I have another nice golden 5.5 to work on this winter and will be on the look out for that tiny drain.
I may need to rework the 5.5 with caps for my friendly neighbor to whom I sold the 5.5hp. He did report what was to him..abnormal fouling during trolling sessions !!!!
Joining AOMCI has priviledges 🙂
