P1405: Hi Belly, the laws of physics show it takes more energy to spit water into hydrogen and oxygen than is returned when the hydrogen is burned to form water again.

Here is a little experiment for you. Get two Copper plates, close together but not touching. Add a 120 Volt battery. Put in a closed container with a exit spout for the gas. Let it run for a little while &hen light the gas coming out of the spout. Piece 'o Pi$$. With a little tuning you can run a lawnmower.

Jayb, your right on the technology and the outcome, but as Paul said, the amount of energy used to create the gas translates into it being too inefficient compared to conventional fuels.
I have no idea of the numbers but what you suggest is possible.
For confirmation I suggest U-Tube, it has heaps of videos of people 'running'? their cars on this battery/water technology, even though I am skeptical, because as Dad found out, you need a large power source and system to create enough gas like Hydrogen to feed a car motor which sucks in huge volumes of air/fuel to enable it to run.
Lawn mowers, being of a small engine capacity/volume, I imagine, not a problem.
I note that 120volts was the power source, is it possible you mean 12V?

altrav: I note that 120volts was the power source, is it possible you mean 12V?

Errr… Yes. Yes I've seen those Utube Videos & had some partial success myself. I did mean to Add Water" too. ;-) I have a neighbor that has a proper outfit that really works well. His mate makes them Commercially.

ALTRAV interesting and continue to read your stuff
But not interested in communication
Your constant insults of my country men put you in the hard basket
Paul knew about the flying peanut thing
My two, thankful via marriage, uncles , high profile at that time, may have been involved
Con men both, but with a truly inventive bent, they served in ww2 as MP,s in Jerusalem,unloved by our troops
Both never regarded the truth and one was seen, shooting the back window of his caravan out!
Then claiming people wanting the secrete to his fuel did it
jayb interesting too

Here's a few more links on unusual cars:

http://www.carsguide.com.au/car-news/12-weirdest-cars-ever-built-in-australia-27994

And -

http://www.motor1.com/news/75965/the-longest-car-in-the-world-is-dead-but-its-coming-back-to-life/

Jayb, Belly, I'm somewhat disappointed that I don't know these guys. I'm truly envious as I have always wanted to see/experience a 'water' powered car/engine.
I have always believed that if the right person/people were given the backing it is possible for it to become reality, but the problem is there is nowhere for the thieves to gouge on-going returns from something powered by water.
So the scum-bags at the top of the heap avoid it like the plague.
I know many of you think I'm talking rubbish, but if you ever had to believe me, this one is high on the list.
AH WELL, so many missed opportunities, just add this one to the list.
To all those people out there who snubbed at the establishment and went ahead with their ideas and convictions, good for you.
May you succeed and prosper.
To all the know nothing, good for nothing skeptics and critics, may you rot in hell.