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Need front bolt for SE116 Lower Drive Unit

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  • Need front bolt for SE116 Lower Drive Unit

    What size is the front bolt (by speedometer tube) needed for the SE116 lower drive unit?
    A stud was used on my old drive and I need to buy a bolt for the new SE116 LDU.

    Does this bolt use UNC or UNF threads?

  • #2
    I believe it is a 7/16-14 x 1 3/4 long. Make sure it is stainless. You may be able to remove the stud from your old lower unit.

    Tech Support
    Brunswick Corporation is the original equipment manufacturer (OEM). Sterndrive Engineering, Inc. (or SEI) is not affiliated with the Brunswick Corporation and is not authorized to sell or service Brunswick products.

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