NOTE: Service Information Advises 80-90 Inch-Pound Torque for 5/8-24 Lead Nuts And 110 To 120 Inch-Pounds For The 3/4-20 Nuts. Always Use A Torque Wrench To Insure Proper Torque Values. Over-Tightening Can Damage The Insulator And B Nut. Please Go To Lycoming Or Continental To Verify Any Changes In Torque Value With The Ignition Lead B Nut.