Re: Johnson AD12 connecting rod

Home › Forum › Ask A Member › Johnson AD12 connecting rod › Re: Johnson AD12 connecting rod

October 28, 2018 at 7:03 pm #85115
chris-p
Participant

    I cannot remember the difference off hand between the casting numbers. Ill check my parts to see.

    If they are the same, make sure you go over those rods closely! They are prone to failure. If I had a dollar for every AD parts motor I have had with a hole through the block I would be rich.

    So many uneducated people out there NOT running them on 16:1 like they should be. These motors MUST be run on a 16:1 mix, or else.

    Make sure they are not scored, worn out of round, worn out of size, etc… before installing, or you are just wasting your time.

    Personally, when I rebuild an AD, I install NOS rods. That’s just me though.