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Thread: Bobs Flats Jack

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    Bobs Flats Jack

    Has anyone ever drilled and pinned a jack plate for long hauls? I've got a 300xs hanging back there and want to travel 1250 miles to Lake Champlain and don't want to find out too late that something let go.
    With my set-up i have the outboard trimmed all in and the jack full up.
    Bobs said not to worry about it but I do.
    I cannot see any issue with drilling a 5/16 hole on each side and running bolts through then letting the pressure off the hydraulics.
    Opinions? Thanks.
    1998 22' Progression 300XS
    1988 15' Boston Whaler Johnson 70

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    I haven't heard of anyone doing this but can't see how it would hurt anything. You'd basically be turning it into a manual type jackplate
    1977 Hydrostream Vector 2.5 Promax

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    I don't know that 2 5/16 dia. bolts through aluminum are gonna hold up a jack plate and 300x

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    Quote Originally Posted by 25two.stroke View Post
    I don't know that 2 5/16 dia. bolts through aluminum are gonna hold up a jack plate and 300x
    The fasteners at the top of the ram that attach the swivel to the plate look inadequate and are installed in the shear direction. But they hold.
    I could go up to 3/8 but not much more.

    Any better ideas out there?
    1998 22' Progression 300XS
    1988 15' Boston Whaler Johnson 70

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    Quote Originally Posted by Steve G View Post
    Has anyone ever drilled and pinned a jack plate for long hauls? I've got a 300xs hanging back there and want to travel 1250 miles to Lake Champlain and don't want to find out too late that something let go.
    With my set-up i have the outboard trimmed all in and the jack full up.
    Bobs said not to worry about it but I do.
    I cannot see any issue with drilling a 5/16 hole on each side and running bolts through then letting the pressure off the hydraulics.
    Opinions? Thanks.
    why do you have it full up? ground clearance?

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    Just trailering 1250 not a problem
    ..Don't worry about it went 2800 miles in 2 1/2 days
    With motors jacked all the way up and didnt move At all ..
    Have cmc Jack plates but don't think it makes a difference..
    but could put a piece of wood thru the slots and let the motor down just on it so its sitting on the wood..
    Just so your not drilling holes.

    same thing (idea) we would do traveling to hold the motor up trim wise w a 2x4 then tied to keep from bouncing

    Plates in good condition if you have a 300 on it...
    If plate was older in crap shape even then I'd still say the wood is plenty..
    LETS GO BRANDON.... LETS GO BRANDON

    Sometimes I talk to myself...then we both just laugh and laugh

    '84 Checkmate Convincor

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    Quote Originally Posted by KIRCHNER View Post
    why do you have it full up? ground clearance?
    Correct ground clearance.
    1998 22' Progression 300XS
    1988 15' Boston Whaler Johnson 70

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    Quote Originally Posted by mrichartz View Post
    Just trailering 1250 not a problem
    ..Don't worry about it went 2800 miles in 2 1/2 days
    With motors jacked all the way up and didnt move At all ..
    Have cmc Jack plates but don't think it makes a difference..
    but could put a piece of wood thru the slots and let the motor down just on it so its sitting on the wood..
    Just so your not drilling holes.

    same thing (idea) we would do traveling to hold the motor up trim wise w a 2x4 then tied to keep from bouncing

    Plates in good condition if you have a 300 on it...
    If plate was older in crap shape even then I'd still say the wood is plenty..
    I thought of the wood. The Bobs has a stop tab inside the box. I may try placing a piece of wood between that and the lower crossmember. I know the lower crossmember will carry the load since the bottom of the ram is mounted to it. Just not sure if the stop tab is up to the load.
    1998 22' Progression 300XS
    1988 15' Boston Whaler Johnson 70

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    Click on it to enlarge you can see the white line..

    Yea I mean just slide a 2x8 cut to the..5 1/4"+- in there didn't have a pic with them up but you get the idea.
    And that's really for piece of mind they won't fall..BUT I makes you sleep better or not stressing while your driving it's quick and easy to do so..
    Click image for larger version. 

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    Wasn't sure if I was clear in the first post
    LETS GO BRANDON.... LETS GO BRANDON

    Sometimes I talk to myself...then we both just laugh and laugh

    '84 Checkmate Convincor

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    The Bobs plate is different. No slots. I'll shoot a pic. tonight.
    1998 22' Progression 300XS
    1988 15' Boston Whaler Johnson 70

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    Oh ok been along time seeing one I'll look up a pic..
    Oh yea now I remember..I've seen how many over the years and if you asked me I couldn't even begin to describe one..lol till I looked..
    And last time I had one was 30+ years ago..
    LETS GO BRANDON.... LETS GO BRANDON

    Sometimes I talk to myself...then we both just laugh and laugh

    '84 Checkmate Convincor

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    Hum got to be some way to get a 2x in there..looking for a video.
    LETS GO BRANDON.... LETS GO BRANDON

    Sometimes I talk to myself...then we both just laugh and laugh

    '84 Checkmate Convincor

  14. #13
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    Spoke to BOB's and they stated the stop tab is fastened by 2 1/2-13 SS screws installed in the shear direction.
    Same size fasteners on the swivel at the top of the ram. Should be fine.
    1998 22' Progression 300XS
    1988 15' Boston Whaler Johnson 70

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