TM problem solved. First, I took the plug apart to check for loose wires, they all were loose and incorrectly installed. So, I correctly installed the wires in the plug. Then I pulled the recepticle, and sure enough, it was wired wrong too. I corrected that, and put it back together. Charged the first tm battery and it was ok. Charged the 2nd battery and it charged for 5 hours and never would take a charge, so that tells me my 24v tm was running on 12 v. Pulled both batteries and reinstalled them in line close to the port bulkhead. Now, that made more room for my gas tank, I could actually take it out. When I got it out, I found that it had used only 3 1/2 gallons of gas over about 12 miles, so that's not so bad. Now I can see the guage when the tank is in the boat. I don't know how the former owner delt with the batteries being placed like they were and not being able to get the gas tank out. Anyhow, after a trip to Wally World and getting a new "Never Start" tm battery, I reinstalled everything and the tm turns faster than ever. Oh yeah, when I got the gas tank out, the inline OMC gas plug to the tank was loose, so part of my milage problem was there too. I really want to thank everyone for their assistance and advise. I am assuming that when I charge the tm battries individually, I do not have to disconnect the series set-up, right?