Best bolts for engine mounting

Discussion in 'Wooden Boat Building and Restoration' started by Kyle, Mar 27, 2004.

  1. Kyle
    Joined: Mar 2004
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    Location: Tulsa Ok

    Kyle Junior Member

    Can any one suggest the best bolt to use for mounting an engine to the stringers? The stringers are 3" x 8" Doug fur. The engine is an 8.1 mercruiser.


    Thanks, Kyle.
     
  2. PAR
    Joined: Nov 2003
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    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Good, adjustable engine mounts thru bolted. That size engine will take some of the heavyest commonly available, I'm guessing 20 - 24 mm . . .
     
  3. Kyle
    Joined: Mar 2004
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    Location: Tulsa Ok

    Kyle Junior Member

    Can you make a sugestion if the material should be a grade 8, or possibly stainless?

    Thanks, Kyle
     
  4. PAR
    Joined: Nov 2003
    Posts: 19,133
    Likes: 473, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    I depends a bit on the application, but no mild steel galvanized or not. Stainless or bronze are the materials of choice, in that order unless there is a dissimilar metal problem that could come up, use what is used else where on the boat (like the strut bolts)

    If this is the boat I think it is then bronze will be what you want to use.

    You just can't bolt the mount to the stringer and hope for the best. This engine and trans assembly will be very heavy and alignment will be a fun with the best adjusters, let alone the painful way of shimming and checking.
     

  5. Kyle
    Joined: Mar 2004
    Posts: 36
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    Location: Tulsa Ok

    Kyle Junior Member


    Thank heavens for the world of modern chemistry and polyurethane mock-up blocks and trannies. It's a wonderful thing
     
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