A huge GM EMD (Electro Motive Division) V12 two stroke engine is running

[@BenjaminEsposti]

The governor needs to be adjusted, it's not supposed to have an idle lope. (But I suppose it won't hurt anything - unless it goes open-loop, in which case the engine speed will increase uncontrollably, though the overspeed cutoff should prevent damage.)

[@arska6383]

If I translate the description correctly this engine originally had a big DC generator at the end of the crankshaft, driving the traction motors of a locomotive. The rotor of that generator is a massive lump of steel and copper and when it is removed the governor may not even have enough adjustment range to compensate for the all weight removed. Thus it idles loped.

[@speed150mph]

Either that engine has a miss, or more likely they are using the wrong or a misadjusted governor. These engines normally run smooth as can be, they shouldn’t be hunting like that at idle.

[@machone1969]

There is no load on it, no gen or counterweight to smooth it out.

[@Creeperboy099]

lmao, it's just a giant detroit diesel

[@billmoran3812]

Governor is way out of adjustment.

[@pootispiker2866]

The racks on either bank aren't adjusted correctly, that's why it is hunting. It's probably on purpose. These engines will drop valves and keep purring at a steady idle

[@gregcaulton5052]

Governor is hunting the due to lack of flywheel inertia.

[@douro20]

In marine applications these engines will typically have a very large flywheel on them. The lack of inertia is the most likely reason the governor is hunting. Running like that it sounds almost like an old Alco.

[@aggewijk4114]

Ärligt talat, denna och 645-an är fan de bästa motorer som någonsin gjorts!

[@Romans--bo7br]

For Pete's sake... take that lope out of the governor.. set the idle up to where it should be, at 350+/-... and how about air filters for the blowers?!!

[@brucerogermorgan2388]

FFS, I agree, it's called "Shunting" and it sounds awful. Bring the idle up, please! It's giving me a headache!

[@camillesymons2170]

So impressive! I just love 💕 these old time diesel locomotive engines! I've started engines like these on passenger 🛳️🚢 ferry's including the 2305 horsepower turbocharged units. I'm an all time diesel buff!

[@cnnw3929]

Sounds like the idle was set too low, which explains the severe variations to the RPM. Maybe find a generation unit to provide enough resistance to run smoothly. But what a great find!

[@pootispiker2866]

The governor is intentionally adjusted to run poorly. It has an internal compensator that is supposed to prevent hunting.

[@AUSSIETRAINDRIVER]

That's a very odd idle for an EMD!

[@Trains-With-Shane]

poorly adjusted governor. Something that their little brothers, the Detroit diesels, also suffered from. Although this is the first big EMD i've ever seen to have that kind of surge. The surge should have gone away after a few seconds, if it had even surged at all at startup.

[@UQRXD]

Such a big engine to turn a bicycle wheel.

[@dogmannz]

So . . . . . a bunch of people came and stood in a field just to watch this?

[@dogmannz]

What's next for them? They came back later the same day after the engine was taken away and watched the grass grow?

[@UQRXD]

Old men with old engines. My engines have gotten newer as I have aged.

[@rodzor]

I ran these on old yard locomotives working on the railway....this engine doesn't sound right at all lol

[@trainfixer1981]

It ran fine in other videos, there is an adjustment you can make to stop the hunting.

[@ibazulic]

This engine is either horribly bad or is not an EMD. EMD engines do not sound that way and have a very nice idle.

[@cat_with_sunglass]

They don't know how to adjust the governor that's is why it is not smooth

[@steeviebops]

And here's how these should sound, video ID KzzSRPx-j1M from about 55 seconds on.

[@DartzIRL]

I know I want in my war rig.

[@kimsndergaard973]

It doesnt sound like a EMD 567

[@jims6323]

Whats wrong with the govenor hunting? Since it's not working, you need some excitement!

[@gtaaddict390]

Sounds like a tractor engine.

[@strappe12gamingMinecraft]

Vilket monster

[@jimmynilsson5983]

Går uruselt, Woodward?

[@floridianrailauto9032]

Why is it hunting?

[@mattlf9120]

Because nobody over there knows how to adjust a governor.

[@whoyoulookingatabs1028]

no one there knows how to use a Governor

[@aggewijk4114]

It’s likely because it has been powering the traction motors on a locomotive prior to being removed. The loss of weight and force put on the governor caused by the removal of the generator, and the governor not being adjusted properly past that is likely the cause of the engine hunting for idle (lope).

[@brendanpowell6613]

Is that a 645e3?

[@cat_with_sunglass]

I think that's 567

[@Romans--bo7br]

Brendan Powell.... No, it is a post 1st generation (1938 - 1943), 567C or D model. The earliest 567's 1st came out as the 567U (cast, top deck), then the 567V (fabricated top deck), and both utilized the "rectangular" airbox & crankcase covers. The 567A and B models also had the same covers, then beginning with the "C" & "D" models & all consecutive EMD's had & have the round covers as does this one in the video. The reason this engine is "loping" (hunting") is due (most likely) to, too low oil pressure to the governor.... IF, it still retains the original Woodward hydraulic governor, which I'm sure it does.... this is very first EMD that I've heard with governor "wander".... but it's not unheard of, and is usually caused by.. as I mentioned previously, idle oil pressure to the Governor being insufficient.... which "can be" caused by too low of an idle speed, which "should be" set at 275/300 rpm.

[@motoe6play730]

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