Reply To: Crankshaft O Ring, 3 HP Johnson 1961 JW-17

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March 31, 2021 at 1:20 pm #235345
Mumbles
Participant

    After checking parts manuals, it seems that O ring was a one year only item, 1966, and OMC must have realised they were trying to saddle a dead horse and they didn’t use it again on the later JW or Lightwin three horse motors.

    Without any forced lubrication to it, I think that O ring would get shredded or torn apart shortly after start up.