One-lung Oil Pumpjack Engine

[permiangroup]

The engine doesnt need tuning, its just a bit out of balance. As the rods come up, the engine pulls more load than when the counter weights come up. Meaning, its a little rod heavy...........NO biggie, it could of just had a full pump barrel.

[oldbogus]

@permiangroup : The well system is out of balance, not the engine. In all my travels, I have found most wells are out of balance. The engine or motor struggles one direction or another, usually lifting the rods. If you catch one shutting down, it is obvious as the pumpjack rocks back and forth as it stops, ending up with its ass in the air!

[Hillbilly8904]

people who complain about that sound must not be to bright. That sound put me to sleep most nights. We had a natural gas well on our property, an i love the way these old engines go. So nice...

[Momarr218]

It's just out of balance also sounds like the diaphram might be hooped.

[rthom86]

theres nothing wrong with the motor. its called a hit and miss engine.

[reynardfoxx]

i love that sound. i cant understand why people complain. we visit a oilfield in northern michigan on state land near grayling

[RainJetSprinklers]

This wouldn't fly very well in California

[adfgfds]

LOL!!

[NewHopebatist]

What is the timing procedure for a

Ajax Pumpjack motor? Position of piston to stab Magneto? Is it TDC?

[rrharley1340]

We ran one in Michigan, taken out of service 3 months ago, on one of our wells. It's running fine, it will only fire when it needs to speed up (hit / miss) Your right about the propane as backup fuel, we had ours rigged to cross over if it ran out of well gas (also runs the heater treater) as for the nearby houses we got a complaint with our new Waukesha 4 cyl motor. They liked the old Ajax better. It was sent to northern Mich. there still in use up there (no electricity needed)

[DRNEGOLICIS]

theres one just like that around me i remember seeing it when i was little around5 i think its still in service

[coondogtheman1234]

good to see these old rigs still chuggin but id hate to live near one and try to sleep

[03llb49]

Used to camp out a couple hundred yards from one in East Texas.....you get used to the sound pretty quick.

[BuffaloWings99]

Oh, no. It's bliss, actually. I lived in Rural Kansas in a pretty heavy little oil patch and the sound of "indians beating on drums" puts you to sleep. Really, they get their own rhythm going and it's priceless. And all those wells were all so Off...backfiring, hitting and missing and such. What do you expect from a bunch of addicts keeping them up.

[OneExoticBoy]

Pumpjacks like this one are hard to sleep by if near a house, but are sooo cool! there are 2 like this near Bushong Kansas

[yieldyieldyield]

Listening to her is agony!

[farmboy460]

seems to running ok

[83caprice]

hmmmm tune up maybe?

[caterpillarnut]

Goddamnit, half the people posting don't know what they're talking about.

Yes this engine has a spark plug. It's a two-cycle Ajax (possibly cooper-penjax) oilfield engine. It's magneto-spark plug ignition, and it uses wellhead gas for fuel (note green tank by head of engine). The reason this engine sounds so "bad" is because when the rod is on the downstroke, it's forcing the engine to turn faster than it wants to, making it backfire. Sort of like driving downhill slowly in high gear.

[Barnekkid]

Well goshawmighty caterpillarnut, thank our lucky stars you're here to save us from our ignorance!

[BuffaloWings99]

almost all the engines in rural kansas sound like that sounds like a bunch of indians banging war drums at night

[jujuman121]

thanks

[jujuman121]

this engine sounds bad

[jujuman121]

it sounds like the piston is hitting the top of the engine

[Rover4Me]

No, its fueled by propane (see description) unless it has oil injection, which I doubt, especially for its age.

[douro20]

Two-stroke engine.

[jumpingjackflash1212]

Nope, four stroke.

[bilpayne]

The Ajax is 2 stroke

[darrin987]

thats cool i like it

[keith91778]

nah, it doesn't need tuning, that's the nature of them 1 cylinder engines, they only fire when they come back around. and them one lungers don't use a spark plug, they use a mag, you touch one of them, you'll get a kick in the rear by a major shock.

[jumpingjackflash1212]

Sure they use a spark plug....the mag makes the electricity needed for the spark.

[stone8675309]

of course the use a sparkplug.

[robscot971]

I remember hearing these running in the distance at night when I was growing up.