I need help again

As in another post, a family friend is going in a Nursing home and is giving his stuff away. He has collected stuff for years. People would simply give him things they couldn't use or get to work, or donate things to his junk pile.
Last week he gave me his wire feed welder.
Two weeks ago he gave me a generator with a Subaru ex27 engine that someone gave to him about 8 years ago but he just pack it away in his shop. The generator is a 5000s and it's spotless. Looks brand new.
I drained and cleaned the tank which still had about two gallons in the tank but thankfully the gas was cut off under the tank.
I replaced the plug any way and pulled the cord twice and the engine started and the generator started working, but.
The engine was running full blast and I could not slow it down so I shut it off.
I pulled the air filter case and noticed the speed control level has no cable going to it.

There are cables missing and two cables not connected. I downloaded the EX27 parts and service manuals but the drawings don't help.

I was hoping someone here has an Subaru ex engine on something and could help me ID what's missing in the linkage.
I don't know how to slow it down before it burns up.
I took the filter off and you can see two linkage are connected to the governor and carb that look right, and two linkage that are connect to the governor at on end but just hanging at the throttle and carb.
I took a photo I hope someone knows where the linkage goes and what on the throttle is missing.
 

try again
a165945.jpg
 
Well, I don't have one to look at, but I can give you some things to look for.

First, have you tried to close the throttle plate by hand? It may be stuck from sitting. With the engine off, you should be able to push the throttle closed with finger pressure, then it will spring back to full open when released.

The manual speed link in the picture has probably been purposely abandoned. You won't find a manual throttle control on a generator. The speed is set so the generator will produce 60hz power by a fixed governor spring. Some have a "no-load idle" feature that idles the engine down when there is no demand, that may be what the hanging linkage went to, I really can't say for sure.

From what I see in the picture, the spring on the connected link is an anti-slack spring that just keeps a positive position on the linkage. There should be another heavier spring, possibly out of the picture, that is the actual governor spring.

But a little governor theory:

The governor arm will be connected directly to the carb throttle plate. (as it is in the picture)

There will be a governor spring that wants to pull the throttle open. This is what sets the speed.

Inside the crankcase there is a set of spinning weights that connect to the governor arm. The force of the weights counteract the force of the spring.

The faster the weights spin, the harder the arm pulls on the spring, that closes the throttle, slowing the engine.

The engine slows down, the weights slow down, the spring pulls the throttle open, the engine power goes back up, the engine speed goes back up.

It is a constant balancing act.

Hope this helps, best I can do...
 
Most generators don't have a speed control, per se. They are governed to run at whatever speed will produce 60 Hz. Some, but not all, have the ability to "auto-throttle" when there is no electrical load. Are you sure it's stuck at wide-open throttle, or is it running at its governed speed?

There should be a governor linkage going to the throttle plate. It should move freely, and after you start the engine you should see it pull the throttle partly closed when it gets up to governed speed. Looking at your picture it appears the throttle linkage is not connected to the governor, which begs the question "where's the governor?"
 
The solid linkage wire that's connected to the governor is not connected to the throttle handle. It goes through the eye of the throttle lever but moving the throttle as it is seen does not move the governor. The throttle handle slides by the linkage which does nothing to slow or push back the governor and slow down the engine.
It looks like the original owner or another less qualified person tried to do something to the engine to speed it up or slow it down.
The linkage from the governor to the carb throttle looks right but the linkage from the governor to the speed control handle looks wrong. Am I wrong?
 
There should be a fixed link between the carb throttle and the governor arm.

The governor arm then is connected with a spring which pulls the throttle open.

This is critical for a gen set, the governor spring controls the RPM, which needs to be set with a Hz meter to get 60 cycle AC, and approximately the right voltage.

That is why there will not be a speed control lever on a gen set.
 
I've spent hours looking at Youtube governor,carb linkage videos from different makes and model engines.

I come to the conclusion that the solid rod that connects from the governor through the hole in the throttle lever has been added by someone clueless, which just added to the mystery.
I'm going to remove that rod and place another spring from the governor to the lever.

The Subaru parts diagram only shows 1 rod and two springs. Sadly it only shows the correction clearly on the governor end.

I'll know in two days and let y'all know.
 

Bishop, try going to a friend who has a working generator and ask him to start it. Any generator that I have been involved with goes immediately to a very high idle, close to full throttle, upon starting.
 
It starts on the second pull, but the engine goes to full blast not just high, and the generator analog gauge goes past normal operating output.

Within a minute the exhaust turns bright red and then the entire muffler glows red.

When I saw that I shut it off.

The engine over revs to a dangerous level.

I have another generator we bought in 1987 when the company moves us from Nashville Tn to Birmingham Al.

It's a 10 hp, 5000k output with a 6000k surge. I have kept up the PM and it will start on the second pull also. The carb setup one that one is very simple, 1 setting, no speed control. It's 30 years old this year and it's help us during Hurricane season down here in Sunset Louisiana for 17 years since we retired.

The oddball generator was a gift from a friend that's headed to a nursing home.

The Subaru 9hp EX27 engine starts and the generator puts out, it's just running way to high. High enough to turn the entire muffler glowing red. The engine is screaming.
 
Last motor I saw that did that had actually lost its throttle butterfly and the screws that hold it to the shaft. I don't know why they didn't destroy the valves/seats/piston 'cause that's where they had to go, but it still had good compression. I just installed a new carb and it was fine.
 
I think I may be on to the problem. I started the engine and I held the governor lever back to keep the engine from over revving. The governor vertical shaft was aligned with the split of the governor lever clamp.

While checking the governor shaft position I noticed while the engine was running this morning that the vertical shaft had moved about a quarter turn within the shaft clamp. I shut down the engine and found I could easily spin the vertical shaft with my fingers even while it's still clamped to the governor lever.
I removed the governor lever from the vertical shaft and found the shaft does not stop turning clockwise our counter clockwise.

This is my first ever governor problem so I'm stupid about the internal governor shaft.

Is the governor shaft suppose to stop in a certain position internally? If yes, the governor is bad and it's not a simple fix.
 
Not familiar with that particular motor, but most of these governor shafts are L-shaped, the arm inside the motor flattened to ride on a spinning button that is in turn pushed toward the shaft by spinning weights. Hard to explain in words, makes perfect sense once you tear down the motor and look at it. But it sounds as if the business end of the hockey stick broke off the shaft. Almost certainly means opening the crankcase. Before I did that I'd at least obtain an exploded diagram of the motor, these are usually available in the parts manual.
 
That's my plan, I've pushed the generator to the back of the barn and I found the service information online.
Either the governor shaft is broke or the governor gear exploded.

I've found the parts I'll need online and this fall I'll open her up.

thanks for the info, It always helps to throw a issue up in the air and thanks to this forum the good guys are there to help one through a problem.
 

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