The speedos can connect with any GPS that has NMEA 183 output. I think that is standard on most GPSs.

birdog,

We have done the pokerrun the past 2 years and go to hockingport a few times a year. Our home base is the muddy Muskingum in SE Ohio.

Any idea on how to wire it up?
Gafrig says they have no manual/directions!

If you could find out what the pins are on the input to the speedo you could make up your own cable with the right connector for the speedo from any GPS. There are only three pins that you need: Transmit, Receive, and Ground. I know with the Magellan units you can buy a data cable for about $15 with bare wires on one end. Then you would just have to put the right connector on the other end of the cable for your speedo.

Of course, a Handheld GPS is going to cost you around $300, but it will do a whole lot more than just tell you your speed...

I just installed my gps speedo and used my hand held as the antenna. The problem with my unit was that I could get a data cable, or I could get a power cable. Not both. The reason was obvious when I talked to Garmin. Their view was that somebody would have hooked the unit up to 12v power and fry it. I would have been that schmuck. I untimatly found the correct cable from a internet company, but it still took some custom wiring to install it. And I mean custom. Ultimatly, I'd have to recommend just going with the add-on antenna. It just isn't worth the headach.

BTW-was that really the price for the antenna? I'm just wondering if that was for a antenna & head.

BIRDOG,

Buy a whole nother gps/speedo kit and now you'll have a second speedo to mount for the rear sear passengers.

Or check out www.Timex.com for the "speed and distance watch" a watch and gps antenna to display mph and miles traveled. Wear it on your wrist!! $180-200 on E-bay.