When I try to start my 110 2011 gio hummer, the starter drags or turns very slow. I tried boosting and got the same results.
- Measured the voltage drop between the + and - at the battery. with and without booster cables. and the drop was down around 6 volts.
- Measured the voltage drop between the starter input lead and starter casing and the drop was down around 6 volts.
- Same results for both, could this be a bad starter. with the plug removed the starter cranks fine.

 

Let me see if I understand you correctly: You take your meter and measure the DC voltage right on the battery terminals, and when you try the start the quad it drops to 6 volts. I'm I right?

Then you "boost" the battery, and measuring right at the battery terminals you still get 6 volts. Am I right.

Please define "boosting". This term means different things to different people. Because "boosting" didn't make any difference you either did it wrong, or your "boosting" device is broken.

WHat I think you should be doing is using jumper cables to hook your quad battery to your car or truck battery. I guarantee you cannot pull *that* battery down to 6 volts without very noticable effects that are quite appropriate for the fourth of july . [This isn't going to happen - because you would have described your problem much differently. I think you are doing something wrong].

So when you hook up jumper cables from your quad battery to your car battery, and measure the voltage at the quad battery while attempting to start - you will not get 6 volts unless you are doing something very wrong. If you still do get 6 volts, then measure the voltage back up at the car battery. You won't get 6 volts there. Right? Six volts drop across super heavy gauge wires have to be caused by bad connections at the jumper cables.

 

I replaced the batteries in my meter, and will retest when I get home from work, when I say it dropped to around 6, it was only while the starter was turning, when the load came off the battery voltage resumed back to 12.4.
- I boosted or used jumper cables correctly, but will look at the jumper cable connections. also the wire going into the starter gets hot (at the starter). - - Assuming I am doing everthing right, what kind of voltage drain Should I get measureing at the starter

these same jumper cables use to start the bike no problem last week, started having problems when lil girl washed the bike with a hose (under neath).
I have so far had to replace a bad solenoid, and bad voltage regulator.

 

Solution found, bad starter. Was stubborn to start at first but now runs perfect...Well almost... need a new battery and kill switch stopped working.
Put a smile back on my lil girls face.