Question about Yamaha EF3000iSEB Inverter Generator 3000 Watts with Boost Technology, 12 Volt DC Output EF-3000iSEB EF 3000iSEB EF3000iSE EF3000iS EF3000i EF3000

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Econo switch doesnt seem to work

Generator wont idle back runs in full throttle,

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: XVS 1100 idle

at sea level there is 14.7 psi of air pressure, the higher you go the thinner the air. thus, need more air and less fuel. adjuster your idle air screw mixture.

Posted on Dec 27, 2009

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SOURCE: idle problem.

The timing is factory set and doesnt change, does it have the idle screw? I assume the one you adjusted is the air mixture screw at 1.5, you shouldnt adjust with the cable as it might cause the engine to rev on full lock, it needs a small amount of freeplay

Posted on Apr 27, 2010

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SOURCE: on my EF30ISEH generator. cold,

Hi and welcome to FixYa, I am Kelly
First off I am just trying to help you and not participating on the FixYa site for the money. I have been working on small engines and generators since the late 1960's.

This is usually caused by the speed limiter assy. (Not a cheap part)
Item 22 this link:
The feedback wiper in the speed limiter is either dirty or worn. When you re-position the throttle arm the feedback wiper is making good contact again so it works normally. It appears that the feedback wiper in the speed control is not making good contact at full RPM so it does not drive the throttle linkage to idle.
If your careful dependng on the design of your speed control you just might be able to take the cover off and clean it up so the wiper makes contact. Wht ever you do DO NOT lift the wiper arm up. You will bend it and never be able to get it to function again. Just clean it. You can use sand paper but... be real careful.
If your speed control is 100 % electronic with only a small DC motor actuator you may have to see if you can clean the brushes and armature slip rings of the internal DC motor.
I have brought several speed controls back to life but it really is a major game of chance anytime you open one up. Just know that your stuck with a very expensive replacement cost for a speed control unit if you screw it up. ----
----It is not a bad thing to keep using your generator with a defective / improperly functioning speed control. As you know is just will not throttle down.
The part number listed above is for the original part number and has been superceded by another part number:
The ($60.00) service manual for this generator is available from Yamaha by PN: LIT-19616-CM-20
Anywhere else the manual is $80.00!

Thanks for choosing FixYa,

Posted on Feb 02, 2011

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SOURCE: i have a yamaha terrapro that idles fine and runs

Hey I was wondering if you ever figured your problem out I have same problem.

Posted on Sep 19, 2015

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Honda EM5000SX generator - will not idle up when a load is placed on. Will produce power but will not idle up.

from your description and what you do , the problem is in the auto control unit
it will be in the system to reduce the rpm to idle when there is no load ( auto mains on off controller switching between genset and mains supply)
by turning the auto operation off you are committing the gen set to full rpms regardless of the power requirement
you have the option of having it fixed at an gen set repair shop or leaving it off and starting the genset only when you have a mains power outage
check with an electrician to ensure that it is possible to run it that way as if the mains power unit is not correct , when you start it and you still have mains power , it will destroy the gen set

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There is something wrong with the auto load sensing switch which is part of the generator. That is the sensor that detects when current load from the generator drops as in when you strike an arc or turn on a power tool and cranks the throttle to full power. It is obviously working on manual because the manual switch is cranking the revs up so the solenoid that operates the throttle is ok. My advice is to take it to a service centre that deals in welder/generator sets as you are playing with dangerous voltages and may possibly damage the machine by tinkering with it or fry yourself (nasty)

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My Honda EB3500X Shuts off when auto throttle is switched on making me run full throttle at all times. Cause? Solution?

if your engine shutting down, then your auto throttle is working.
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There may be a choke handle that should reduce the engine RPM. Otherwise contact the Coleman technical support department.

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Hi Joe, I had asked for a little clarification and have not received any information. I will answer this question based on the generator is in good working order and it is a recoil start. Open the petcock, (this is the fuel valve) and give it about a minute to fill the fuel bowl on the carburetor. If your generator has an engine an on/off kill switch, set to on. If the generator has an auto idle switch set it to off. If the engine has a throttle lever located under the carburetor, push it all the way down (full throttle). Pull the choke knob out completely, there is a detent on the choke for half choke, pull it past this for full choke. pull the recoil starter rapidly. As soon as the engine starts running push the choke knob to half choke, this will allow the engine to run smooth while it's warming up. Depending on the climate that you are in, warm up time will vary. After a minute or two in cold climates start pushing the choke knob in, if it starts to run poorly pull it back out too the half position and let it warm up some more. When you can posh the choke in without the engine faltering it is ready to go. In warmer climates you might be able to start the engine without the choke or in the halfway position. Robin Subaru makes some of the finest small engines available. I would choose a Robin over a Honda every time. I hope this gets your generator going, and once again this is based on the generator being in good working order. Good luck, Michael Burke.

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1 Answer

Throttle on generator question

The idle control switch allows the generator to go into idle when there is no demand form the appliances connected. This saves gas and increases the life of the generator. Damage can occur for some appliances like a refrigerator/freezer because the voltage and frequency are not prepared for the load resulting in a low voltage bad startup that will damage the appliance. Suggest that you leave the idle control switch off while any motor/electronic devices are connected.

The throttle control is likely a choke function for starting. These generators are designed for only one running speed to produce the necessary 60 cycles per second and voltage.
The following link is to a Canadian web site that later in the detail report describes the concern of idle control. In addition it provides good insight to the operation and use of portable generators

Hope this helps?
Understanding Portable Generators

The user manual see pages:


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Idle problem. the bike wont stay idling, i adjusted the screws to 1.5 turns out, and tightened the throttle cable coming from the throttle and still doesnt idle without working the throttle.. timing maybe?

The timing is factory set and doesnt change, does it have the idle screw? I assume the one you adjusted is the air mixture screw at 1.5, you shouldnt adjust with the cable as it might cause the engine to rev on full lock, it needs a small amount of freeplay

Apr 26, 2010 | 2004 Yamaha YZ 450 F

1 Answer

Automatic idle stays on when i use something instead of throttling up it stays idleing

4 Things can cause this, 3 of which are related.

1) Governor arm is binding, or has slipped on the governor shaft. Check and reset if needed.

2) The "Load Detection" is not working correctly. Either it is not able to sense a load, or it won't disengage the solenoid.

3) Solenoid which moves the governor (for lower speed) has stuck due to dirt and grime in the housing

4) The linkage on the solenoid is binding due to dirt and grime.

The Econo Mode / IdleMatic / Whatever is actually hard on your appliances and tools. Nothing electric likes to be subjected to a low voltage at the wrong frequency, then be forced to tolerate a sudden change in frequency and voltage. Personally, I would find the pin that holds the solenoid linkage to the governor, and remove it, allowing you to remove the linkage altogether. Disconnect the electrical connector the solenoid, and just use the generator at full and proper speed.

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Auto idle on a reddy rgh11000 ie will not idle down

This sounds like the idle control solenoid has become misadjusted. To check that this is the case, locate the throttle lever and follow it back towards the governor arm until you find the solenoid. Start the generator and switch on the idle control while watching the governor arm where it passes near the solenoid, if the arm snaps back and forth you probably have a bad adjustment. To readjust the solenoid loosen the jam nut on the core of the solenoid just enough that you can turn the core by the square bit on the end. Adjust the core 1/4 turn or so at a time until the governor arm stays in position when the idle control is on, then turn idle control off and make sure that the governor arm goes back to the full throttle position. You may have to fiddle with the adjustment a little until you find the right spot. Tighten the jam nut back down and you're good to go.


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