Posted by Maniak on March 30, 2009 at 09:57:14 from (204.17.37.244):
The weather warmed up around here (great southern AZ spring weather) so I started to work on our new to us 40 H (http://ytforums.ytmag.com/viewtopic.php?t=411094&highlight=).
The carb came in the mail to replace the one with the broken ear.
I changed the carb, plugs, checked the mag, made sure it had oil and water in it and decided I really need to get a better idea how bad it is...
I put in the dead 6v battery that came with the tractor so the wires would short on anything.. I installed it as positive ground which is opposite of how it came to us..
I hooked a 12V jump box right to the starter closed the choke, hit the button on the jump box and it fired up in about 2 rotations.. It lives..
I had a volt meter sitting on the battery terminals and saw odd numbers...
With the meter hooked up for a positive ground (red lead on the chassis and black lead on the negative terminal on the battery) I was seeing jumping voltages from -5v to -13v. I let it run about a minute and shut it off since I was getting confused.. The tractor is in good enough shape for me to continue working on it...
My question is... What the easiest way to figure out if its negative or positive ground and if its 12v or 6v? It didn't occur to me until I started to write this that I didn't polarize the generator but I don't know if that would cause something like this.
I haven't started it back up yet since I really need to change out that old oil and filter and replace the hoses and belts and don't want to hurt anything by being impatient and running it with a dead 6v battery in wrong.
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