Reply To: 1956 Johnson 30hp Rebuild

[olcah]

I found a 1954 Johnson RD that had both the updated drain system and the oring. The parts list for 1952 RD 12 shows the oring while the 1956 RD18 PL does not. I think that people just assumed that an oring was required and put it in. As you saw the Johnson tech manual to 1964 page 308 describes backfitting the drain system and deleting the oring.