running on vegetable oil
Posted September 23, 2011 - 09:07 AM
Posted September 23, 2011 - 10:15 AM
i saw a video on youtube of someone running a pushmower on vegetable oil. I know u can run diesels on it but, can u run a gas engine on it. It was a briggs and stratton engine with no mods. I think
Yes I have seen that too. I think that is a very cleaver hoax. I'm pretty sure it is well done a diesel conversion on a stock apearing gas engine.
Posted September 23, 2011 - 10:21 AM
Posted September 23, 2011 - 11:13 AM
Posted September 23, 2011 - 12:07 PM
Edited by MH81, September 23, 2011 - 12:26 PM.
Posted September 23, 2011 - 01:15 PM
Posted September 23, 2011 - 08:53 PM
Are you sure that they are not running veg. oil in the crank case? I have seen it done, although I do not recommend doing it. I also saw the fella who is cutting veg. oil with gasoline. Shawn
I would think veggie oil would gum up pretty bad. And then there's that viscosity thing.
Posted September 24, 2011 - 10:22 AM
Posted September 29, 2011 - 03:25 PM
Posted September 29, 2011 - 03:29 PM
Posted October 02, 2011 - 08:54 AM
Posted October 02, 2011 - 09:17 AM
i mowed my whole yard with it.
Kinda surprised it worked. I'd watch the gum factor... of course, it couldn't be worse than Ethanol...
Posted October 02, 2011 - 09:41 AM
Kinda surprised it worked.
Posted October 02, 2011 - 09:50 AM
Posted October 04, 2011 - 09:26 AM
The older style diesels (mechanical injector pumps and injectors) will pump just about anything. As long as the diesel fuel has a flash point (any fuel does) within the compression range of the engine, it will burn. Most vegetable oils have a flash point not too far from diesel fuel, so they work ok. Viscosity is the issue. Thats why the truck conversions usually add a tank heater of some sort to warm the vegtable oil and lower the viscosity to get it to flow easier. Or they will run a mix of diesel/veg oil (using diesel as a thinner). The oil had to be filtered to get the junk out of it though.
In the days of FREE waste oil, (on the way out apparently...) used veg oil was like free fuel.
Newer engines with variable pumps and electronic injectors are a lot more sensative to fuel and fuel impurities (like stuff in waste oil!), so may not run as well as the older stuff on veg oil.
Gas engines depend on vaporizing the fuel. Vapor point of veg oil is way different, so should not work in a gas engine. I have used premix (gas oil for 2 stroke engine) in a 4 stroke engine by accident and it does work ok, but smokes. It is the gas that is running the engine though, not the 2 stroke oil.