"markm4" wrote in message
...

Has anyone ever tried running a higer voltage on a 12 volt motor. Since
I am using 2x 6volt golf cart batteries, I was thinking that maybe I
could get away with 3 batteries (18 volts) on the same 12 volt motor,
and get a little more thrust out of it. What do you all think?

I think that you'll go like crazy....for a little while.

If you want to run higher voltage, buy a higher voltage motor. You can't
get Ferrarri performance from a YUGO and running 18 volts into a 12 volt
motor is a nice recipie for a toasted motor and/or fire.
--
Steve @ OutdoorFrontiers
http://www.outdoorfrontiers.com
G & S Guide Service and Custom Rods
http://www.herefishyfishy.com