Originally Posted by michpete
I suppose my real question is f I am placing Jacks underneath my land yacht, where is the most dependable and stable place to position them? I'm afraid I'll puncture the bottom. I have 6 jacks and would like to raise the vehicle high enough to have the wheels off the ground. Thanks for your insights.
You only need two if they are big and capable enough, and are on stable footing such as concrete. Place them under the axle mounting plate on each side, and use the tongue jack in the front. If you have no tongue jack, use another jack stand under the tongue.
Actually using more than two might cause a unequal loading of the frame and introduce a twist.
I've removed all the tires and wheels from my trailers like this several times without problems.