50 amp (125 volt) Marinco shorepower cable needs dock side fitting replaced.  Have new male plug and yellow "boot" which covers assembly.  Is it a diy job?  For example, I don't see how old boot comes off.  Been told to use liquid soap but it seems very tightly fitted to cord and male plug housing.  Suggestions? Bob Siegel Annapolis... PS been  told that it is not a good idea to spray inside shorepower female plugs with WD-40 since it conducts electricity.  Recommended product is LPS-1 which I had never heard of.  Supposed to dry contacts without leaving conductive coating.  Any experience with this product?

Yes, easy DIY. For lube, you can use silicone spray, soap, or any of the
anti-corrosion sprays for electrical. I prefer Corrosion Block, which comes
in a blue and white spray can. I spray all of my electrical cord contacts
quarterly, and the inside the boat contacts annually. That includes
everything inside the electrical distribution panels, 110v sockets, 12v
sockets, etc.

When you replace the old plug, notice that the new one will have color-coded
rings matched to the conductor color. All very easy to do. Just be sure to
strip the old wire down to shiny new wire, insert and tighten well, then
hose down with Corrosion Block or similar.

Keith

Many people would sooner die than think; In fact, they do so. -- Russell

50 amp (125 volt) Marinco shorepower cable needs dock side fitting replaced.
Have new male plug and yellow "boot" which covers assembly.  Is it a diy
job?  For example, I don't see how old boot comes off.  Been told to use
liquid soap but it seems very tightly fitted to cord and male plug housing.
Suggestions? Bob Siegel Annapolis... PS been  told that it is not a good
idea to spray inside shorepower female plugs with WD-40 since it conducts
electricity.  Recommended product is LPS-1 which I had never heard of.
Supposed to dry contacts without leaving conductive coating.  Any experience
with this product?

Hi Bob
 
Try sticking something thin down between the cover and the plug, squirt in some liquid soap and running the thin item (screwdriver?) around the circumference to loosen the grip on the plug, maybe squirting in some soap as you go around. Also lub the cord too; it's been my experience that if the cord isn't lubed it's one heck of a fight to get the cover to slide down. It's amazing how difficult it is to remove those covers and the older they are, the more irascible they get.
 
By the way, when you install the wires into the plug's holes, be sure to use a dielectric grease. I take my syringe that I've filled with grease, stick it into the holes and give it a squeeze before I stick the wires in. Do the same with the male and female ends.
 
Rudy
Briney Bug, Panama City, Fl