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Subaru engine on my generator is running at full throttle not under load

The engine is running full throttle as if the governor is all the way open, there is no load on the generator.

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

  • 11 Answers

SOURCE: Coleman generator OHV3000

The carburetor is probably clogged up. Mix a bottle of carburetor cleaner with the gas to see if that would help. Also check/replace the fuel filter.

Posted on Sep 10, 2008

  • 211 Answers

SOURCE: generator not running smoothly under load

Hi

I think it is because the governor sistem.(no properly working).Perhaps the governor lever spring is tightened.There is a screw to adjust it,try to locate it.Hope this helps.

regards savumihai71

Posted on Dec 13, 2008

  • 3 Answers

SOURCE: motor runs wide open but no power from generator

You will need to install new diodes,they are located in the plastic housing behind the receptacles...It looks like little spark plugs..They work to put dc voltage to the rotor,without the exciter voltage applied,you will not get ac power out..The part number is 3483.01....You can buy these online for about $6 each,they have 2 inside the generator,and you should change both.

Posted on Dec 17, 2008

  • 1383 Answers

SOURCE: Porter Cable 5500w generator (10hp BS) will not regulate speed.

While attending college I worked at a tool rental center and learned a great deal about matching generators to customer requirements and troubleshooting customer owned units. There are simple tests that you can perform, however, first some info on what to expect from a generator. Most generators are overrated and under powered. You should only expect to get about 60 - 75% of rating. Example, a commercial honda 5000w generator has an 11hp motor that can only produce about 9.5 hp at 3600 rpm. If a customer needed 5000w of power, we would rent them an 8000w generator because as the generator is loaded to max the voltage will drop. You generator will probably only provide steady voltage ex. 115v at 60 cycles to about 3500w then voltage will begin to drop. New generators have automatic voltage regulator that varies the power to the armature increasing/decreasing the power of the magnet. These voltage regulators suffer a high failure rate and are expensive. If your generator is not giving you 3500 watt at 115v 60 cycles your engine may have a few problems and your power generator end may need tweaking. (I would not expect to achieve 5500w at 115v with briggs 10hp) .
The governor is about 2 inches in diameter and turns off the cam gear inside the engine. It is flyball type with two or three small arms that react to rpm. The faster the engine turns, more force is applied to the governor arm to reduce engine speed. Easy to test, with engine running use finger pressure against the arm to increase speed and you should feel a greater resistance as the engine speed increases. Another simple test, remove air filter to expose butterfly inside the carb. Move the governor arm and check that the butterfly opens fully. If it does not open fully linkage and governor is not set correctly. Next, start engine and load generator up to max and check that butterfly opens to full as the load increases. When the butterfly opens all the way under load the engine is at max. Add up the wattage of all the tools/appliances you used to load the engine to get an idea of max load . Lets assume that the shop adjusted the governor properly, if the governor was not working the engine would over rev. and damage would occur. As you were told the governor spring controls speed and can be adjusted somewhat by bending tab or adjustment screw. But a review of your generator manual or that series of briggs engine will show that there are several governor springs available and different placement holes on the governor arm to attach the spring that will change the power curve. Pulling on the spring can only do so much, however changing the spring to different gauge /turns/material or differnet location on the governor arm will cause the engine to perform differently. These springs are sold thru briggs dealers by part number for your engine. This would be considered tweaking to get a different power curve.
Now for the generator. Some generators have a capacitor incorporated in the windings. This capacitor must measure within 95% of rating. Remove from circuit for testing. Finally look very carefully at the commutator rings for any evidence of brush bounce. If the brushes do not perfectly seat you will lose power. If your generator is brushless you can only hope that the diodes are within spec. because it is too difficult to test them. They also must be removed to test. Finally if your generator has an automatic voltage regulator the only test would be to replace with a known good part. At the rental center we stocked spare parts so that we could quickly find fault. There is soo much to learn and the life too short. I hope this helps good luck, please email your questions.

Posted on Dec 27, 2008

  • 1 Answer

SOURCE: Honda EU3000is Generator is running poorly.

Can anyone help me with the eco-trottle switch when I switch it on it seems to run the same idle whether I have it off or on, what could be causing it not to work, is it a bad switch or I am running 89 octane could that be the problem.

Thanks
Alex

Posted on Oct 09, 2009

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My model 1431 diesel engine can not reach full rpms .and under a load starts dieing until the engine load is released.then trys to rebuild rpms.why.I already replaced the fuel filter.


the operation of a governor system in all pumps is to remain at full throttle until the governor control reaches a predetermined setting
so it is at full throttle when stopped , starts and the governor setting is idle so it runs at idle until you change that setting in which case it moves back towards full throttle again
I explain it like this so that it can be understood that from your description you will see that there is a problem in the governor control system
As governor control is critical in a diesel engine I suggest that you seek a proper diagnosis from an accredited professional diesel pump repair shop as it is very possible that the pump or electronic control will have to be inspected / repaired

Mar 25, 2017 | Cars & Trucks

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Briggs and Stratton 17HP Intek Governer Overspeeds


Can you Regulate the Engine Speed Using the Governor Arm? If Yes, then Reset the Governor. **To Reset the Governor; Loosen the Governor Arm Bolt and Turn the Governor Shaft Clockwise Until it Stops. Using the Governor Arm Hold the Carburetor to Full Throttle. Now with the Shaft Full Clockwise and the Governor Arm and Carburetor Held at Full Throttle, Tighten the Governor Arm Bolt. If the Engine Still Runs Full Throttle, then Reverse the Rotation of the Governor Shaft, but Still Hold the Carburetor at Full Throttle with the Governor Arm. If it Still Runs at Full Throttle, then Check the Internal Governor.** If you Can Not Regulate the Engine Speed Using the Governor Control Arm, then Check the Carburetor Throttle Valve. If the Throttle Control Valve (sometimes called a Flap or Plate) Mounting Screws Came Out of the Control Valve, then you will have No Control Over the Engine Speed. Send me the Model and Type or Spec Numbers Off the Engine, Please. With these I can Locate the Proper Manual and Better Assist you. **The Throttle Cable Attaches to the Throttle Control Bracket. The Cable Moves a Slide that Moves a Pivot. The Pivot has the Spring Attached to it and to the Governor Arm. The Solid Link Connects to the Governor Arm and goes to the Throttle Shaft on the Carburetor. When the Throttle Cable is Moved it Moves the Pivot and the Pivot Pulls the Spring. The Spring Pulls the Governor Arm and the Governor Arm Moves the Throttle Shaft. Usually the Spring is in the Lower Hole in the Governor Arm and the Solid Link is in the Top Hole of the Governor Arm.** If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance. Hope this Helps. Let me Know What Happens

Sep 23, 2008 | Garden

1 Answer

No engine speed change under load


Sounds like the governor is not adjusted right or is broken internally. With the engine off make sure the throttle in the carburetor is full speed and unloosen the bolt that holds the governor arm on the shaft and make sure the shaft is turned the same way the carburetor linkage moves to full speed and tighten the bolt.

Mar 26, 2014 | Dewalt Tools Generators DG2900 , 2900 Watt...

1 Answer

Coleman Powermate full throttle


There may be a choke handle that should reduce the engine RPM. Otherwise contact the Coleman technical support department.

Dec 22, 2013 | Coleman Powermate Powermate 5000W...

1 Answer

I HAVE A POWERMATE 5000 THAT SHUTS DOWN UNDER LARGE LOAD . I THINK I NEED AN IDLE CONTROL MODULE.THERE IS A 2 WIRE MODULE IN THE START CKT. #21009XA IS THIS IT AND WHERE DO I GET ONE .


Idle control comes into play when there is no power draw forcing the engine to idle with an electro magent. If you feel that the electro magnet is interfering with governor, temp remove the wire to the solenoid. Usually the idle control will not effect how the engine /gen output power. An overloaded condition will cause the engine the go the full throttle as the internal governor of the engine will try to maintain 3600 rpm. Overloaded condition will greatly shorten the life of the generator/engine. Try to use only about 80 % of rated power. Large motors can draw three times running amps. A compressor using 12 to 18 amps to run can draw over 40 amps to start.
If your generator could handle the load in the past, check the engine for loss of power, or the generator for faulty voltage regulator or capacitors out of range. Easy to check. Connect digital volt meter to plug /load and look at volt reading while running with no load and loaded. Voltage should stay between 110 to 120 under load and with no load (unless goes into idle mode). Good luck

Sep 06, 2011 | Coleman Powermate Powermate 5000W...

1 Answer

Have Onan 3.6 KY propane gen that will not keep running. Runs only as long as start switch is pushed. Then stops immediately after release. Fault code is 15 (underfrequency) and suggests removing heavy...


I am not familiar with your peice of equipment but from your description of the fault being Under Frequency it appears that generator governor is out of adjustment or the governor spring has brcome weak or broken and not allowing the engine to run at the correct speed to produce an output frequency within the allowable tolerance. Governor linkage could also be binding and not moving smoothly to respond properly to engine load conditions. Thoroughly check governor and throttle linkage for free and smooth operation and full range of movement.
Another cause could be that the engine is not getting sufficient fuel causing the governor to have the throttle wide open to try to get engine to run at its correctly governed speed but unable to do so because the engine is not developing enough horse power.

Jan 10, 2011 | Watts Onan Portable Generator - 4000 ,...

1 Answer

Motor is running eratic up and down under load


One of the most important parts of your engine is the engine governor. An improperly adjusted governor can shorten your engine's life. If engine speed is not controlled, the engine will destroy itself. Never run an engine over speed, especially without a load attached to it. Even for a short period of time it can cause catastrophic failures, like blowing the magneto magnet into 100's of little pieces. Over speeding is something that needs to be taken care of immediately, because it can be a real hazard with metal coming loose at high speed. This page will explain how to adjust the mechanical governor on Briggs and Stratton and Tecumseh Engines.
First, let's understand a little more about governors and why they may not be working right:
Most complaints about governors fall into two categories:
  1. Engine runs too fast or too slow.
  2. Engine surges or hunts.
You should do an inspection of the governor linkage and spring before trying to solve either of these problems. Make sure everything is operating freely and the spring is not damaged or stretched. Also, check the governor static adjustment to see that all free play has been removed between the spindle and carburetor. The best way to do this is to move the throttle from idle to full open and note the way the governor shaft moves. If it goes clockwise, then loosen the clamp screw and with the throttle wide open turn the shaft all the way clockwise and re-tighten the nut. Make sure the throttle moves from idle to full open freely after making the adjustment. Refer to the engine repair manual for exact adjustment procedures.
After you have made the above check, restart the engine and see if the governor now operates correctly. With the engine at idle, move the governor lever with your finger to open the throttle and it should push the arm back toward idle if working properly. One way to do this test is with the governor spring removed. If it still over speeds or has no push toward idle, you probably will need to have the internal parts checked inside the motor or recheck the static adjustmen

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1 Answer

My generator starts and runs great for a while then suddenly the rpms will drop or will race very high causing extreme flucuations in the power level produced


Take a close look at the governor and its associated springs. There should not be any play in the governor arm, springs should be taught when engine is off.

The governor spool may also be binding, but much harder to check since it is internal to the engine.

Start the generator, and watch the governor arm. When RPMs drop, you should see the arm move in an effort to open the throttle. Conversely, when the engine races, you should see the arm move in the opposite direction to try and close the throttle. Small movements of the governor are normal with a steady load. If you don't see the governor trying to correct engine speed, you likely just identified the culprit.

Jun 02, 2010 | Briggs & Stratton Briggs Stratton 6200...

1 Answer

As soon as my 10 hp Briggs & stratton engine starts, it goes to full throttle. I have no control


The engine speed is controlled by a governor and throttle position. There is a spring that holds the throttle (butterfly valve) against the slower position. When the motor is under load' the governor exerts force to open the throttle position. Make sure that all of the components are clean and not binding. Look for a broken or disconnected spring. It is also possible that the governor is stuck in the demand full throttle position.

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1 Answer

Ginne stalls under load


Likely that your governor has creeped out of tolerance. Very common with Emerald line of generators. Try to borrow, if not already have one, a multimeter that is able to read frequency and voltage. At no load, frequency should be 62 or 63 hertz. At full load, frequency is going to be around 57-58 hertz. Voltage at no load should be 127 or so, full load should drop down to around 115 give or take. Adjust governor for faster engine operation for low voltage / frequency, slow down for too fast frequency or high voltage (though that is likely not the case here).

Problem with Emeralds is that the governor spring rubs on bracket, and also has a tendency to stretch. If this is the case, adjusting governor will be near impossible between full and no load.

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