How do I get higher RPMs governor Wheel Horse 414–8 Magnum Kohler 14

[bradleydavidgood 38]

 

[gwest_ca-(File Mod) 12,454]

There may be something in this service bulletin that will help.

Are your cables in the correct holes at the bottom of the brackets?

 

[JoeM 10,157]

this is a pic of my old magnum.  

I am going from memory shorten the screw will increase max rpm 

[bradleydavidgood 38]

Thank you both for those.  I put them next to each other and there are several things different but I think one is the same.  And I see that my screw is not upside down, but I don't see how that screw contacts anything.  I'm going to take a picture of mine today and put all three next to each other.

I'm also going to set up 3 cameras and do a video showing the linkage moving while running and moving the throttle.

[702854boy 1,104]

20 minutes ago, bradleydavidgood said:

.  And I see that my screw is not upside down, but I don't see how that screw contacts anything.  

It looks like there is a little bent out tab at the bottom of the throttle pivot that would hit against the screw to prevent over revving the engine

[953 nut 68,519]

How do I get higher RPMs governor Wheel Horse 414–8 Magnum Kohler 14

The question you are asking runs counter to the purpose of the governor. The attached manual has a step by step adjustment process. Try moving the rod that is presently in the sixth hole to the third hole and see if it becomes more responsive.

 

To adjust the mechanical governor on a Kohler engine follow these steps.

Turn off the engine: Ensure the engine is completely off and cool before working on the linkage. Set throttle to wide open: Move your equipment's speed control lever to the fast or high-speed position so the carburetor throttle butterfly is pushed completely open. the governor arm nut: Find the bolt or nut that clamps the governor arm to the metal cross shaft coming out of the engine block. Loosen it just enough so the arm can rotate freely on the shaft. Rotate the governor shaft: Hold the carburetor throttle wide open, then rotate the governor cross shaft as far as it will go in the direction that pulls the throttle open until it bottoms out and stops. Tighten the clamp nut: While holding the carburetor wide open and the governor shaft fully rotated to its stop position, securely tighten the clamping nut or bolt on the governor arm. Torque it down properly (typically around 60 inch-pounds if using a torque wrench)

 

With this understanding, here’s how to check the governor.

Manually move the governor arm/throttle lever back and forth between the stops. Observe the amount of movement and the tension on the governor spring.

Detach the spring from the governor arm.

Position the governor arm/throttle in the middle and start the engine.

Gradually adjust the governor arm to slow down and speed up the engine.

As the engine speed rises, you should notice an increase in tension on the governor arm, and as the engine speed drops, the tension should decrease.

If there is no tension at all, the governor is likely faulty, and the engine will need to be disassembled for inspection.

The primary purpose of the governor on a Kohler air-cooled engine is to maintain a constant engine speed (RPM) under varying workloads. It is not to speed the engine up; the governor's role is to attempt to slow the engine down.  The faster the engine runs, the more pressure is exerted on the governor shaft (in the engine) and arm.

The point at which the force from the governor (trying to slow the engine) matches the force from the governor spring (trying to speed the engine up) and maintains a steady engine speed is referred to as the governed speed.

 

When you use equipment like a lawnmower, tractor, or generator, the engine encounters different levels of resistance (such as hitting tall grass or drawing an electrical load). The governor automatically adjusts the throttle to keep the engine running at its optimal speed, preventing it from stalling or over-speeding. When the governor detects Load Changes its RPM naturally starts to drop. The governor senses this drop in speed and automatically opens the throttle valve to let in more fuel and air, restoring the engine to its target speed.

Conversely, if the load is suddenly removed, the engine speed will rapidly increase. The governor responds by closing the throttle to prevent catastrophic internal engine damage from over-revving.

Kohler’s mechanical (Centrifugal) Governor: Uses internal flyweights attached to a gear inside the engine. As the engine spins, centrifugal force moves the weights, which act on a shaft and linkage connected to the carburetor throttle.

When the engine is off, the governor spring keeps the throttle in the wide-open position.

Upon starting the engine, the governor, which consists of a centrifugal weight inside the engine, begins to spin.

Centrifugal force pushes a weight outward, applying pressure on the governor shaft and causing it to turn.

The governor arm, connected to the governor shaft outside the engine, also moves.

 

With this understanding, here’s how to check the governor.

Manually move the governor arm/throttle lever back and forth between the stops. Observe the amount of movement and the tension on the governor spring.

Detach the spring from the governor arm.

Position the governor arm/throttle in the middle and start the engine.

Gradually adjust the governor arm to slow down and speed up the engine.

As the engine speed rises, you should notice an increase in tension on the governor arm, and as the engine speed drops, the tension should decrease.

If there is no tension at all, the governor is likely faulty, and the engine will need to be disassembled for inspection.

 

 

Edited 3 hours ago by 953 nut

[bradleydavidgood 38]

16 minutes ago, 953 nut said:

How do I get higher RPMs governor Wheel Horse 414–8 Magnum Kohler 14

The question you are asking runs counter to the purpose of the governor. The attached manual has a step by step adjustment process.

The primary purpose of the governor on a Kohler air-cooled engine is to maintain a constant engine speed (RPM) under varying workloads. It is not to speed the engine up; the governor's role is to attempt to slow the engine down.  The faster the engine runs, the more pressure is exerted on the governor shaft (in the engine) and arm.

The point at which the force from the governor (trying to slow the engine) matches the force from the governor spring (trying to speed the engine up) and maintains a steady engine speed is referred to as the governed speed.

 

When you use equipment like a lawnmower, tractor, or generator, the engine encounters different levels of resistance (such as hitting tall grass or drawing an electrical load). The governor automatically adjusts the throttle to keep the engine running at its optimal speed, preventing it from stalling or over-speeding. When the governor detects Load Changes its RPM naturally starts to drop. The governor senses this drop in speed and automatically opens the throttle valve to let in more fuel and air, restoring the engine to its target speed.

Conversely, if the load is suddenly removed, the engine speed will rapidly increase. The governor responds by closing the throttle to prevent catastrophic internal engine damage from over-revving.

Kohler’s mechanical (Centrifugal) Governor: Uses internal flyweights attached to a gear inside the engine. As the engine spins, centrifugal force moves the weights, which act on a shaft and linkage connected to the carburetor throttle.

When the engine is off, the governor spring keeps the throttle in the wide-open position.

Upon starting the engine, the governor, which consists of a centrifugal weight inside the engine, begins to spin.

Centrifugal force pushes a weight outward, applying pressure on the governor shaft and causing it to turn.

The governor arm, connected to the governor shaft outside the engine, also moves.

 

With this understanding, here’s how to check the governor.

Manually move the governor arm/throttle lever back and forth between the stops. Observe the amount of movement and the tension on the governor spring.

Detach the spring from the governor arm.

Position the governor arm/throttle in the middle and start the engine.

Gradually adjust the governor arm to slow down and speed up the engine.

As the engine speed rises, you should notice an increase in tension on the governor arm, and as the engine speed drops, the tension should decrease.

If there is no tension at all, the governor is likely faulty, and the engine will need to be disassembled for inspection.

 

 

 

How does the question I am asking run counter to the purpose of the governor if as the service manual says, the max RPM is 3600, the engine is running way below that, and the service manual gives instructions on how to raise the RPM by adjusting the high speed adjusting screw?

 

It says:
The primary purpose of the governor on a Kohler air-cooled engine is to maintain a constant engine speed (RPM) under varying workloads.

 

Therefore, if the governor is not maintaining a high enough engine speed, it needs to be adjusted higher.  

 

And the RPM can be adjusted higher or lower which is the purpose of the high speed adjusting screw.

 

Thanks!

 

 

 

[bradleydavidgood 38]

Thank you for the other manual.  While it is not the same engine or linkage, it is helpful.  See below screenshots.

 

It also has wording confirming the ability to increase engine speed by adjusting, which is my question.

 

And I will try the adjustment method below. 

 

 

 

However, I'm first more interested in the linkage on the front right side of the motor, where the high speed adjustment screw is as in post #4.

I think my linkage is different than both in that post.

 

I don't think we have established the correct initial linkage setup for that front right side and I'd like to do that.

 

Thanks!

Edited 2 hours ago by bradleydavidgood

[bradleydavidgood 38]

2 hours ago, bradleydavidgood said:

Thank you both for those.  I put them next to each other and there are several things different but I think one is the same.  And I see that my screw is not upside down, but I don't see how that screw contacts anything.  I'm going to take a picture of mine today and put all three next to each other.

I'm also going to set up 3 cameras and do a video showing the linkage moving while running and moving the throttle.

 

I would love to see more pics of this area on tractors that are known to have this linkage set up correctly.  Maybe if we see a lot the same way we can determine the proper initial set up.

 

Thanks!

[JoeM 10,157]

Need to make sure the tab contacts the head of the screw when throttle is in max position.

Also, need to move the governor spring to the hole circled. 

[gwest_ca-(File Mod) 12,454]

A governor works by slowing the engine down. The spring between the governor arm and the throttle cable is what speeds it up. The balance between those two forces is the rpm you end up with.

To increase engine speed adjust the throttle cable casing by pulling it away from it's mounting point on the engine and retighten. That will shorten the throttle wire.

The choke can be adjusted the same way to improve the dash control position.

[JoeM 10,157]

4 hours ago, gwest_ca said:

To increase engine speed adjust the throttle cable casing by pulling it away from it's mounting point on the engine and retighten.

 And have the throttle lever in the high setting, the tab should contact the screw head. 

Your governor spring is defiantly in the wrong hole and will not react well under a load. It will way to stiff if left in the existing postion.

[bradleydavidgood 38]

Thank you guys!  

 

Two videos of what I did this morning.  

 

First, moved the linkage per JoeM.  Thank you JoeM!

 

But after moving it, the governor still pushed it back to the idle stop when the throttle lever at the dash was fast.

 

 

 

Edited 25 minutes ago by bradleydavidgood

[bradleydavidgood 38]

So then I went back to the governor shaft and readjusted that and that allowed the engine to run at higher RPMs.  What do you think of this level of RPMs?

 

Tomorrow I get a tachometer so I'll be able to better set the high to 3600.