I was told that Mercury has a part to allow you to hook both pumps up but have not been able to find this number.

Call a Merc dealer and ask for priority valve kit. Merc part number is 79691A1.
The Merc unit has been discontinued for quite some time but some dealers may have one collecting dust on their shelves.
The Imco unit is your closest bet or try finding a 6 port manifold from your local hydraulic shop.

here's something that could be rigged > http://www.parker.com/portal/site/PA...(25+GPM)&Wtky=

You can buy the valve from Lathem also.

went to my local hardware store Princess Auto today and picked up a diverter valve by Shoemaker.
They had some solenoid control model for the lazy ones at $224 but I opted for this manual model ,for $ 99.
http://shoemakerinc.com/newCatalog/d...pages/3169.htm

sweet i was thinking of making something like this but its not worth it for 99 bucks, good work!...

What's the price for the Imco or Lathem valve? Fully automatic, no solenoids or levers. You don't even now they are there.

I think around $300 and I'm not even sure if the Imco and Latham units are automatic or not.I saw another valve at the store with solenoid at $224.I prefer the manual valve.Only needs switching in case of engine problems or balancing engine hours for folks who could putt putt on one engine in the Channel in Havasu,gawking at the girls with pasties,lol

Yes, Lathem is a no touch valve, I assume Imco would be too. Never seen one in a boat with a manually operated valve., whether by hand or solenoid.

Yrs ago someone here posted exactly what it is called so you could buy it at a hyd shop.

The Latham valve (part # VALV-3175) is $377.28 plus shipping. I called yesterday to see what they cost for a friend. I am glad I have one already installed in my boat.

guys, having some hyd sys experience (heavy equip) i dont see what could go wrong in one of those valves other than bad orings, back up rings or maybe some gabage stuck inside. i suppose i should get off my ass and take mine apart and report back. im hoping to get it out in a week or so. another thing is it seems to me that only higher end boats came with this valve although my mirage has it. i dont consider mirage a high end expensive boat. ive even had mercuriser certified mechanics tell me "there is no such thing you dont know what your talking about" ya whatever dickhead...