Originally Posted by jpendoley
Removing my Perkins
40 from my P365 sloop
. I am on the hard
and the crane can't reach. Thinking of using the boom supported by halyards to lift
it out of the cabin
and drop it over the side, Engine
weight 450 pounds. Is this safe? Will jackstaand support the boat or will it fall off the stands?
I lifted the 650# engine out of my Columbia
36 that way with no problems. Keep in mind that when you lift something with a crane (in this case the mast
and boom) the center of gravity of the load is at the top of the crane, here 40 something feet above the deck
. That's a hell of a long lever arm. There'll be no threat until you swing the boom to the side to get the engine over the ground. Don't swing any farther than you have to. In my case I didn't have a boat next to me so I was able to back my truck up partially under the boat so I only had to barely clear the hull
side. Actually I lowered it to the height of the bed
then backed under it, if something had let go with the engine 10 feet above the truck bed
it would have gone right through it. The engine was already dead so I didn't much care if it fell to the ground.
Just make sure the stands are solid and on firm ground. Some boatyards
territory have tie down points like at an airport
for parked planes. Can you rig something like that, maybe a halyard
run to an anchor
point of some kind on the side opposite the lift? Have you asked the yard about it? They probably have an opinion as well, and might tell you not to do it.