My Zombie Engine Build

[jerrdanjohn]

This definitely took some fabrication and techniques to build. A 3 hp briggs that runs without a spark plug or carb.

 

[madosta]

Pretty neat. I thought at first it was just a video with sound playing over it, but you can see the shaft spinning.

 

[jerrdanjohn]

Pretty neat. I thought at first it was just a video with sound playing over it, but you can see the shaft spinning.

It really runs! and without a sparkplug or carburetor. Thanks for watching.

 

[Muggzy]

This definitely took some fabrication and techniques to build. A 3 hp briggs that runs without a spark plug or carb.

So how's it done?

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[madosta]

Diesel? Compression only?

 

[bamf]

I think it has a high compression piston and the sump is overfilled with diluted oil or diesel fuel and it's just ingesting that... thats my guess

 

[jerrdanjohn]

Not dieseling has stock compression. I am going to wait a while and let people guess, then I am posting the build video.

 

[iajonesy]

I better not die before you show us how it works!!!!!!!!!

Mike

 

[Muggzy]

Also noticed that grounding the spark plug wire killed the engine. Very curious clue

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[jimgood]

Also noticed that grounding the spark plug wire killed the engine. Very curious clue

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I noticed too. Very mysterious!

 

[wyo george]

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[hotrodscott]

I think a day is a long enough wait....

 

[scrumpy]

My guess. Spark and fuel introduced somewhere under one of the covers. We never see what he may or may not have done to the port where the carb was bolted on

Da scrump

 

[dogdog]

I better not die before you show us how it works!!!!!!!!!

Mike

hahahahha He is Stanley Myers in hiding. That engine is powered by human brains.

 

[jhn9840]

Like a hit and miss engine. Sort of :

jhn9840
John

 

[rslaback]

Did you do the machining yourself?

 

[readhead]

Is it running backwards with something going on in the muffler?

 

[rslaback]

I'm going to go with a modified rc engine fitted into the crankcase of the original engine. The rc engine can breath through the crankcase breather and the exhaust goes into the cylinder (with a missing exhaust valve) and therefore out the original muffler.

Since the rc engine doesn't use a spark plug that part is completely not needed, the rc engine uses a needle valve for fuel instead of a traditional carb so that isn't a lie. The original flywheel would still spin so it would still spark to the block. I haven't figured out the trick of the spark seemingly killing the engine. Maybe a solenoid that controls the fuel to the internal engine?

 

[jeepinerdeep]

I'm saying it's converted to 2 stroke here fellas and the fuel is in the crankcase.

 

[Kevin54]

I'm thinking the fuel is in the muffler, and the timing is off to where the engine diesels maybe or running in reverse. If the engine was running in reverse, it would **** in during the exhaust stroke. I know I'm way off base, but just taking a shot at guessing. Unless there is a wire running directly off of the coil to the combustion chamber and bypassing the plug for spark. When the plug wire is grounded, it kills the other spark. And the engine is probably to the point that there is no compression whatsoever. But it does have to have fuel.

 

[jerrdanjohn]

I really appreciate everyone's guesses. My goal wasn't to make a engine run like this, but to get folks thinking outside the box, so your guesses bring me more gratification then making the engine run. The engine runs in the correct direction and the muffler is 100% stock with nothing added, but I was waiting for that guess, it means your thinking... Some of the guesses are so good, it has given me new ideas, so it works both ways. I will be reviling how it works soon. I seen a man do this to one before and he never gave the secret, I was inspired to do it myself using my guess of how it worked, but still not sure how he done it. Everyone will totally understand how I done it when I show it. I decided to do one video of me taking it back apart so you will clearly see, then I will be posting the actual build on my channel also for anyone that needs the specifics in case they want to do there own. I really appreciate everyone watching.. Jonathan

 

[theoldwizard1]

Air pressure line hidden under the board, come up through the bottom of the block (which is hidden) and into the crankcase. A "calibrated" leak that it opened by the piston near top dead center. Momentum from the flywheel, pushes the piston (from underneath) past top dead center and the "exhaust port" is covered by the piston (think 2 stroke).

 

[jerrdanjohn]

Air pressure line hidden under the board, come up through the bottom of the block (which is hidden) and into the crankcase. A "calibrated" leak that it opened by the piston near top dead center. Momentum from the flywheel, pushes the piston (from underneath) past top dead center and the "exhaust port" is covered by the piston (think 2 stroke).

I built a few water pumps into steam engines on my you tube channel and I run them off air, so what you are saying is possible, excellent guess, you are thinking that's for sure, may be the way I build the next one, but this one is much different, no air!

 

[joe49]

Original head is covering, head being used and engine is two stroked off crankcase for intake with fuel in oil, breathing threw crank case vent, exhaust is going threw original combustion chamber.

 

[jackson1701]

My guess is a smaller engine inside. You Milled out all of the internals of the 3hp motor, installed a smaller engine inside (possible 4 stroke weed wacker motor) use the pull start to turn over the engine inside to start. The original spark plug wire is wired into the internal engine and used as a kill switch. Valves were removed to allow access for fresh air intake and to exhaust.... Me thinking outside the box but inside the motor....

 

[SilverSS1969]

The suspense is killing me!!

 

[Clogking]

I have no clue how you did that.
This is a guess from my buddy at NASA .
"I will guess that it is dieseling (compression ignition) and the fuel is oil from the ring blow-by or bad crank seal that drives the pump gear"

 

[dogdog]

I have no clue how you did that.
This is a guess from my buddy at NASA .
"I will guess that it is dieseling (compression ignition) and the fuel is oil from the ring blow-by or bad crank seal that drives the pump gear"

He said in post 5 6 7 that he is not dieseling it. I don't see exhaust fumes from the muffler at all, so probably a small electric motor inside that way too big 3HP engine. He could've hiding an small electric motor inside.

 

[R.Anderson]

My guess is the engine is kinda inside out. Combustion is happening on the connecting rod side of the piston. With a modified or custom machined piston with a valve so the original exhaust port is still being used.

 

[Responder]

Suspense.

 

[Kevin54]

Waiting for the answer

 

[Kevin54]

I'm going to take another guess. I'll go with the gas in the oil and blowby like others have stated, but I guessing the coil is shorting out somehow or a wire is ran to the combustion chamber, or it involves a capacitor that is charging and discharging. Then when the plug wire is introduced, it interrupts the spark therefore killing the engine. And again, just a wild guess

 

[jerrdanjohn]

Later today I will post the teardown video..

 

[ChargerRT]

Thank god! I need to know!!

 

[Kevin54]

One more guess....it has higher than normal compression.

 

[tlmartin84]

It's all in the muffler....

 

[Craptain]

SWAG
I think it's some kind of malfunction that happens to have an interesting side effect. Beyond that I really don't have a clue.

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[Muggzy]

One more guess....it has higher than normal compression.

Post 7 he says it has stock compression

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[nonhog]

Duh! Its somehow using Magic Soap.

 

[bluebolt]

The clues Jerdann gave us.
1. It has stock compression
2. It only has the one spark plug
3. The engine runs in the correct direction
4. The muffler is 100% stock with nothing added
5. It's not dieseling

My thoughts so far are the spark plug has been modified to be a glow plug and he is using model engine style glow fuel. There is a tiny fuel line running behind the pull starter cover going to a needle valve in the intake port and there is a small fuel tank and electric fuel pump hidden in the board underneath the engine. The flywheel has been modified to act as a small alternator grounding it out kills the fuel stopping the engine. Notice the second time he starts it with the carb off he hooks the spark plug wire back up until it starts running then he removes it. The first time the glow plug is still hot enough to start it up.