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-   -   Lifting points for cradles, 1988 F311 SR-1 (https://www.offshoreonly.com/forums/trucks-trailers-transportation/365841-lifting-points-cradles-1988-f311-sr-1-a.html)

F14A water jet 04-15-2020 09:48 AM

Lifting points for cradles, 1988 F311 SR-1
 
My boat lift installer is looking for a point-of-reference for the main lifting point (center of gravity?) to set the cradles for my 1988 Formula 311 SR-1 with twin big blocks and Bravo drives. Can anyone help?
Thanks,
Tom
Ps-he's estimating about 3' forward of the transom (not including swim platform).

ren3 04-15-2020 12:51 PM

Look at it's position on the trailer if you have one. On a triple axle is should be somewhere near the center wheel centerline, maybe slightly to the rear of the C/L. Three feet forward of the transom seems a little too short.

F14A water jet 04-15-2020 01:08 PM


Originally Posted by ren3 (Post 4733918)
Look at it's position on the trailer if you have one. On a triple axle is should be somewhere near the center wheel centerline, maybe slightly to the rear of the C/L. Three feet forward of the transom seems a little too short.

You are right, I miss interpreted. The center of the ~10' cradles will be near the center axle of the trailer. So rear lift support of the cradle ends up about 3-4 feet from transom.

ren3 04-15-2020 04:43 PM

Like your trailer, the lift bunks should be extended to the transom so the bottom does not develop a hook due to the weight of the engines putting pressure on the unsupported ttransom. Hopefully a boat lift expert will weigh in.

F14A water jet 04-15-2020 05:17 PM


Originally Posted by ren3 (Post 4733939)
Like your trailer, the lift bunks should be extended to the transom so the bottom does not develop a hook due to the weight of the engines putting pressure on the unsupported ttransom. Hopefully a boat lift expert will weigh in.

Bunks go the full length to the transom... thanks

F14A water jet 04-26-2020 08:11 AM

hanks to all that helped...
https://cimg7.ibsrv.net/gimg/www.off...501a2ff79c.jpg

Helmwurst 04-26-2020 08:32 AM

Formula should have a drawing to show the support points. Call them to get a copy.

F14A water jet 04-26-2020 08:45 AM


Originally Posted by Helmwurst (Post 4735618)
Formula should have a drawing to show the support points. Call them to get a copy.

Thanks, we used the trailer set-up as a basis and equalized the tension on the front and rear cables...worked like a champ!


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