Reply To: 58 Johnson 35hp

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September 6, 2023 at 8:23 am #280248
Don
Participant

    US Member

    OK, so you get low compression readings when cranking with the electric starter.

    I suppose it is possible that one of those compression relief valves is stuck/bad.  Otherwise, you will need to pull the head to see what is going on, perhaps just a blown head gasket.

    But again, something seems screwy, you claim it was running on the low cylinder.