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Prop Nut Tightening?

Discussion in 'Boats and Motors' started by Ruminator, Jul 22, 2007.

  1. Ruminator

    Ruminator TeamOGF

    Is there a basic rule of thumb to use if you don't have a torque wrench?

    Like maybe hand tighten then wrench it to the next hole that lines up.
    Or is that too light?
    I'm putting a new OMC basic replacement oem prop on my Johnson 70.

    Thanks guys. ;)
  2. I tighten mine until I can't hold it on my knee, then back it off to the closest notch. Not a technical approach but after using a torque wrench several times, I've approximated the force needed on the wrench and just go with it.

  3. KaGee

    KaGee Monkeywrench Staff Member

    The proper way to torque a prop nut is to place a 2x4 against the cavitation plate as a prop stop and torque to 85lbs with a torque wrench. Harbor Freight has them on sale all the time if you don't have one.

    An improperly torqued prop can cause pre-mature hub failure or worse.