Question about Coleman Powermate Portable Generator PM0435003

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My engine goes to full throttle when started under no load . how do i correct this problem.

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If you have the type of engine where the carb is attached to the gas tank then you need to replace the gasket diaphragm between the garb and the tank theirs springs their so be careful you don't lose them and this should solve this issue this fix repaires the choke that will start to close after start up and cause the engine to race and not stall.
if the carb is not attached to the tank you may have a broken guvnor spring or a broken guvnor fingers that's internal the engine will need to be tore down and the issue parts replaces i suggest you get a small engine repair manual you can get them from the library as well if you don't want to buy and tackle this your self other wise take to a service place for repair hope this helps

Posted on Aug 30, 2010

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Posted on Jan 02, 2017

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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

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When you pull the trigger the motor comes under load as the pump starts to work at full pressure. Check for throttle control and setting for engine speed under load.

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FC540v Kawasaki john Deere 265, bugs down under load,emitting black smoke & then dies. Works fine without air filter.Carb cleaned, Compression check has 80 lbs


You may have this posted in the wrong product category. Please select another category appropriate to the problem and re-post the problem so the correct expert will see and respond to the question..

Thanks for your attention to this matter.

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The battery is really only there for the electric start. Put a digital volt meter on it while running it under the load of the AC unit. Or if it goes off on the overload with the AC unit, try a variable load like an electric heater or two that you can switch on in steps. Most space heaters or hair dryers have a 1000w, 1250w 1500w so you can increase the load. Watch what the voltage does. If at 1500-2500 watt load the voltage starts to drop drastically, say from 125v down to 90 or 80v as the load increases, that usually indicates a problem with it not getting enough fuel. On these inverter generators, the carburetor is controlled by the inverter by the use of a throttle motor. As the inverter senses the demand for more power, it increases the throttle to deliver more horse power of the engine, thus meeting the demand for more electrical power out.
I have seen a couple things cause this. A partially plugged jet in the carburetor can cause it. A bad throttle motor (Part# 21) on the top of the carb can go bad. I even had one that I caused myself by not putting the little spring (part #20 on the exploded view of the carb) that sits under the throttle motor in correctly.

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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

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1 Answer

Hi, my homelite is approx 12 months old and she has decided to rev at full throttle when she starts. no problem starting. she goes hard out normally. any sujestions would be appreciated. thank you. paul...


Open the cover over the carburetor/air cleaner and watch the throttle arm on the carburetor while you move the throttle trigger. It should go from idle stop to full stop and return to idle stop when trigger is released. If mechanically ok, then look for a very loose carburetor mounting to the engine or a broken heat insulator block between the carburetor and engine--a bad air leak can cause the engine to race uncontrollably (but will cause other damage if allowed to continue). If the throttle arm is holding open, then take the trigger assembly apart at the handle (make notes as you disassemble to get it back together correctly). Look for sawdust obstructing the trigger. Hope this helps!

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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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2 Answers

I have a 1994 Yamaha 40 HP 3 cylinder 2 stroke engine starts and runs fine in neutral try to accelerate under load and it only will pull about 2800-3000 RPMs and wont go any faster it will rev fine in...


Reving in neutral does not mean the same thing as under load. If you need to pull 4500rpm under load and for an instant the load was gone, you would probably overrev to 6500. With the cover off and motor not running move the throttle to full forward. Look at your carbs and see if the throttle plates are wide open. If they are not all wide open take it back to the dealer. The throttle adjustment is off. You need the full range of travel from idle to topend.

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1 Answer

Tecumseh engine #143.985510 - carb linkage hook-up


Hello:

The Carbuertor Throttle is Held in the Full Open Position Until the Engine is Started and Running, then the Governor and Spring Work together to Keep the Engine RPMs to the Desired Setting.
The Following is an Explaination on How the Governor System on Small Engines Function.
>>The Governor System behaves like an Unending Tug of War between One of Two Governor Springs, which Pull the Throttle Toward the Open Position, and a Spinning Crankshaft, which Tries to Close the Throttle. When the Load on the Engine Increases - a Typical Example is when you Move your Running Lawn Mower from the Driveway to the Grass - Crankshaft Revolutions Drop. But the Governor Spring is Still Tugging, Causing the Throttle Plate to Open. In Response, a Larger Volume of Air-Fuel Mixture Enters the Carburetor, Increasing Engine Speed to Compensate for the Increased Load. The Crankshaft Speeds Up, and the Tug of War Resumes, until a New Equilibrium is Achieved. With Each Change in Load, the Tension Between the Governor Spring and the Load Brings about a New Equilibrium, known as the Engine's Governed Speed. Neither Side Wins until the Engine is Shut Off. At that Point, without the Crankshaft Spinning, the Governor Spring Pulls the Throttle to the Wide-Open Position. Two Types of Governors are Common on Small Engines - Mechanical and Pneumatic.
Please, Do Not Hesitate, 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, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

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1 Answer

Husky 455 dies out at full throttle or under load


Your carb may be the issue but your ignition coil could be the culprit. Once they start going bad, they can act up intermittently or give various symptoms from day to day. The fact that your saw dies at full load or under load, probably means that when your saw gets hot or requires more spark, your coil is not able to provide it. Your carb is easy enough to clean out, you can take it all apart and clean all screens, etc....

I just replaced my coil due to the exact same symptoms and now my saw runs great. $60 off ebay and you can put it on in 15 minutes yourself. Check your carb first though

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