Used motor oil fuel?

[karl]

I saw some you tube vids of people puting glow plugs in briggs engines and running them off diesel. I know diesels use oils for fuel and gas engines use vaporous fuels. Well used motor oil is an oil Do you think you can dilute used motor oil with something like kerosene and run it as diesel? I know there will need to be a massive re-jet. Any when people do the diesel mod to a briggs, how much power does it lose? I know this is probally really stupid, and impractical, but could it work? I have axcess to tons of used motor oil. Its just a thought.

 

[fowler]

do u think the briggs could handle the extra compression

 

[karl]

They were not saying the compression lit the fuel, the glow plug lites the fuel

 

[fowler]

still doesnt deisel go off with more or a "bang"

isnt that why deisels are more powerful

 

[karl]

Diesels are more powerful because of high compression. When you put a glow plug in a briggs it will run on diesel. I wanted to use semi- diluted used motor oil as fuel.

 

[fowler]

in theory

u could try it on an old engine of some type

the older the better

 

[karl]

Might try it to that 3hp I converted to a horizontal shaft awile ago.

 

[B man]

I saw some you tube vids of people puting glow plugs in briggs engines and running them off diesel. I know diesels use oils for fuel and gas engines use vaporous fuels. Well used motor oil is an oil Do you think you can dilute used motor oil with something like kerosene and run it as diesel? I know there will need to be a massive re-jet. Any when people do the diesel mod to a briggs, how much power does it lose? I know this is probally really stupid, and impractical, but could it work? I have axcess to tons of used motor oil. Its just a thought.

could you send me links to those vids? i realy want to watch them.

 

[karl]

Ok. He used a glow plug. I would haft to do something about the smoke if I put it on a moped Have a can with packing to capture the crap maybee?

http://www.youtube.com/watch?v=SiRC6eIoZNE

 

[fowler]

why is there no rocker cover

then smoke adds to the affect

my unlce loves old engines and would put any small engine mechanic to shame

most of his engines shouldnt technicly run but they never fail him

he never buys part or rebuilds them he just patches them up with fencing wire and scrap metal

he has a 1960s water pump of some type, its a deisel of maybe 5hp

it smokes like a *****

actually exactly like that engine only the idle is black smoke

i dont think it runs on straight deisel i think he adds sothing ill ask him what

 

[Doc Sprocket]

Interesting. He said he decked it 6mm to bring the compression up to 20:1. That explains a bit. I'm still wondering what he did for fueling.

 

[Russ2251]

Slightly off topic but related.
Any 4 cycle engine will run on kerosene if warmed up on gasoline first.

 

[karl]

I know I got 2 gallons of kerosene for the heater, but winters over so I burned it in my lawn mower. Also we had a allis chalmers WC I think, It had a seprate gas and kerosene tanks. Good thing I was 9 years old at the time, Crank starting a 400ci inline 4 was hard ! Well Im still not strong enough, but we sold it.

 

[Doc Sprocket]

Slightly off topic but related.
Any 4 cycle engine will run on kerosene if warmed up on gasoline first.

I'd call that on topic. Very interesting. At that point, is the kerosene spark-igniting, or is it the heat/compression combo?

Also- I am led to believe kerosene is very similar to diesel- does the above apply to diesel, too, and what are the ramifications of doing this?

 

[oldbikerarlo]

A couple years ago I had GMC 5500 that had diesel engine I ran on a mixture of 10% refined used engine oil and diesel. One of the local farmers was blending it up from mexican diesel and oil from the farms equipment. It ran fine, didn't even smoke.
If you were to try it in a Gas engine. it should work with a glow plug.

 

[karl]

My step dad has the wire used for glow plugs, I forgot what is was called but he will give me some. I am probally gonna drill a hole through the tip-electrode what ever it is called. Then cut off the flat bar that the spark leaps to. Then drill another hole on the ground of the plug and run the wire in between. I wounder if the magnatron coil can power the glow plug?
Sorry I dont know the exact vocabulary, I just know what Im talking about lol

 

[Bluethunder3320]

Try it with a bad spark plug. Maybe bend the prong out and attach a wire from it to the positive side in the middle?

One thing i think will happen is your carb will get totally gunked.

 

[maxpower49]

I know i haven't had many posts but i do know about diesels... diesel engines don't need glow plugs to run, glow plugs just help diesels start in the cold but some engines don't even have them like large farm equipment they have block heaters to help start in the cold. Also on allmost all diesels with glow plugs they are only used before you even start the engine and for a couple seconds after starting to help smooth out the idle, but most of the time they are not even needed unless it is really cold out. also all diesels are direct injected and that is also part of the reason why diesel dosen't run in gas engines, diesel has to be in a verry fine mist to burn properly, injectors for diesels are in the thousand PSI range injected directly into the cylinder when it is almost at the peak of it's stroke. It would be tough to convert a gas to diesel, i'm not saying it can't be done but it would probally cost more than a one cylinder diesel engine any way. You can run a diesel on used oil, kerosene, even used cooking oil but todays diesels run best on plain old on-road diesel. you might be able to get a gas engine to sputer or cough and run rough if you put diesel in it but adding a glow plug probally won't work...also glow plugs are only desinged to run for short ammounts of time like a starter when cold starting a diesel they usually cycle for a minute then on and off every few seconds untill the engine runs smooth. I could be wrong on a couple things that is at least what i know about diesels and gas engines.... any way back to the origonal topic adding a glow plug probally won't work if you read the comments on the video the second one says the glow plug helps start but the ingition is compression he increaced the compression all the way to 20:1 from 8.5:1... Also diesel might work with a carb i'm not %100 sure but i don't think it would work too well like the video.

 

[newrider3]

also all diesels are direct injected =.

Quite untrue... International 6.9/7.3 engines in Ford pickups, and GM/Detroit 6.2/6.5 diesels are just a few examples of IDI diesels. Coincidentally these also run very well on waste motor oil with proper fuel heating and filtration.

 

[Badot]

Okay in layman's terms --

Gasoline engines pull in the fuel and air at the same time, compress them together (for more power when it explodes) and blows them up when the piston is lined up to go downwards using the spark plug.

Diesel engines pull in the air by itself, then compress it to a very high ratio (at which point the air is extremely hot) and then instead of a spark plug, they have a fuel injector in the head - this sprays in fuel roughly the same time a spark plug would fire, only the extreme heat created by the high compression causes the fuel to spontaneously combust.

Glow plug and block heaters for diesel engines preheat the engine, so the internals of the engine don't rob the air of too much heat during compression to where it won't ignite when the fuel is injected.

Long story short, if you try to run a 'diesel' engine with air/fuel mix being drawn in together, it will detonate on every single stroke.

Also, kerosene is similar to diesel. Not so much gasoline though. I can see kerosene running okay in fuel-injected engines once warm, but not carbureted, because the flash point (temp at which it can evaporate to form a combustible mixture in air) is typically 100-160 degrees f, whereas gasoline is -45 f. Huge difference, and the kerosene is liable to not evaporate at all.

http://en.wikipedia.org/wiki/Flash_point