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Stress on Transom From Jack Plate

Posted: September 10th, 2007, 6:27 pm
by Ron Wilson
General question: Was wondering if the extra distance created between the transom and the motor when a jack plate is installed creates extra stress on the transom? As I look at the motor set back, it would seem like there is potential for added stress. Anyone know, or am I the only one who doesn't know the answer? :roll:

Posted: September 10th, 2007, 6:34 pm
by tin can
Most transoms are over built. You don't get nearly the stress from the jack plate as you do from.........oh, hitting a rock at 40 MPH. :roll:

Posted: September 10th, 2007, 6:36 pm
by Chalk
You are the only one :wink: :lol:

It can add a little more stress, but the entire transom is built to a standard and designed to take a certain amount of torque and stress, usually much more than needed.

The jack plate bolts to the same holes as your engine...The jack plate is designed to hold the engine, the transom is designed to hold the engine...It will be fine Devil Dawg :thumbup: :thumbup:

Posted: September 10th, 2007, 6:40 pm
by birddog
I've seen the jack-plate fail but never the transom (without running into something.)

They've broken several jp's on the redfish tours

Posted: September 10th, 2007, 7:03 pm
by Ron Wilson
Was hoping for a coordinated response from The Council, and as usual, not disappointed. Thanks Gents. Glad I went with the jack plate. Ready to try it out now. :thumbup:

Posted: September 10th, 2007, 7:05 pm
by Redbelly
What kind of boat do you have ron Wilson?

Posted: September 10th, 2007, 7:11 pm
by Ron Wilson
Just put the JP on a 1910 NauticStar.

Posted: September 10th, 2007, 7:20 pm
by birddog
How bout a pic Ron.

Posted: September 10th, 2007, 9:08 pm
by grim reeler
To answer your question, yes the jack plate does add extra stress to the transom because of the added distance. Think moment and fulcrum - you know, like a see-saw - the further you are from the pivot point, the less force it takes to move the other end.

But like others have said, most transoms are over built and can take it without any issues.