Hi tmoss68 & Welcome~

I'm guessing that the Regal has a Single A/C unit…If there is more than one you probably could only run one at a time.

Water Supply…There are a few ways to do it but none are such that you could run it for long, or unattended…

It's important to run Thru the A/C pump so that it does not run dry when you start the A/C unless you disconnect the A/C pump wiring at it's power source…

If you don't want to remove any hoses you could try taking the top off of your sea strainer, remove the basket and just insert the end of a garden hose into the strainer…This will allow a lot of water to overflow into the bilge while you are getting started so you will need to be sure the bilge pump works well and can keep up with the overflow….Then will be the problem of if the A/C pump will pick up prime and pump water thru the A/C…Please don't run the A/C more than a minute if you don't get water right away.

The other way is to somehow adapt the garden hose to the suction side of the pump….Easiest way is to remove the strainer end of the pump hose from the strainer and adapt it there with PVC fittings or the like…Water will flow directly thru the pump (don't worry you can't damage the pump this way) and start coming out the side of the boat (or wherever it normally does) It's then safe to start the A/C…

Some folks even install a permanent "T" fitting inline with a female garden hose connector and a ball valve to shut it off for flushing purposes…If you decide to go this route….Just be sure to not restrict the flow with the fittings you choose…These pumps rely on unrestricted suction side plumbing to get rated flow. Also make sure you don't make any loops in the hose that might trap air and not allow the pump to prime by itself when the boat is in the water.

Speaking of Power….Usually a small extension cord will not carry enough current to Start A/C units…You should use a cord with #12 conductors, and if the unit is as large as 16,000 btu…It still may not start the compressor, or have trouble doing it depending on how far you have to run to the outlet….The shorter the distance the better….Or if you can run the boat's shore cord directly to the outlet without an extension cord that's even better…

Good Luck, and Congrats on your New Lady…Let me know how it goes…

Steve~

tmoss68 said:

From the seacock looks like the line goes to a small box with a clear top (very close to the seacock).  Looks to have power there too so I am guessing this is the pump.  I do not see a sea strainer.  Is it incorporated into the pump somehow or could it be in another location.  The AC model is a Mermaid 6500 btu. 

Gosh…It really is hard to say from your description…Mermaid did some funny stuff too…but Power there ?

Could it be that the pump is "that close" to the strainer (clear top) and you just have a pump wire strapped to the hose ?

Anyway…It's a small unit and you should be able to find the "suction" side of the pump…That's what you want to put your hose to….

That size unit & pump cannot over suck a "city pressure" garden hose…It only needs 250 GPH for a ton of A/C (12,000 btu) Your hose should be able to provide close to 500 GPH…So run it as we said by disconnecting from the seacock and adapting there.

Steve~