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My Honda ep3100cx generator starts and idles but will not rev

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Posted on Jan 02, 2017

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SOURCE: The generator starts up then dies?

Check the oil pressure switch. It will shout you down like that if it doesn't sense oil pressure.

Posted on Oct 01, 2009

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SOURCE: honda 7000w generator outputs 6vAc when idling.

Well I dont know, but I do know that when it idles nothing is going to work. So whats the use of having a generator idle? Generators must turn at 1800 or 3600 rpm to operate.

Posted on Mar 13, 2010

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SOURCE: Hi I have an older honda es 6500 generator. It has

check your governor spring or governor adjustment

Posted on Oct 20, 2013

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Honda eb5000 generator starts fine seems to run good but idle control does not work . will not rev up at all.i can turn carb idle screw in to bring revs up it makes power out of the generator but idle

Like a lot of stationary engines a generator engine is governed, or at least should be governed.

That is to say, when the engine is started it should be running at a predetermined speed which is not an idle speed but the speed the engine works most efficiently and that typically would be in the region of perhaps 1800 to 2500 rpm. In the case of an alternating current (ac) generator the speed will be determined by the alternator and the requirement of the frequency of the ac output to be around 50 to 60 cycles per second.

It is the function of the governer to maintain that preset speed within fairly close limits so when an appliance is connected to the generator and switched on the load increases and if it were not for the governer the engine would slow down which would be unacceptable. The governer therefore opens the throttle and restores the speed to the preset value. When the extra load is removed the engine will speed up momentarily and then restabilise at the right speed.

The governer is somethimes an engine driven set of bob-weights hidden inside the crankcase and sometimes nothing more complicated than a flap moving against a spring in the blast of cooling air from the fan. In all cases the governer is connected to the carburettor, typically by an adjustable link that includes a spring.

From your description it would seem the governer of your generator engine is jammed, broken, seriously maladjusted or simply no longer connected.

I hope this helps.

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1 Answer

What would make a McCulloch FG6000MK 11 HP generator start and idle fine but not able to rev-up and generate power.

Have to an ultrasinic cleaning of the carburetor and see if that will clean up the problem,

Bad on parts though most are NLA. but a carburetor from a Honda 11hp horizonal might work on this Chinese Honda cloned engine.

Nov 24, 2014 | Electrical Supplies

1 Answer


Most generators will run at full speed when started. Verify in the owners manual if Your generator has an idle control setting. Even so, as soon as you plug something into the generator, it will rev up to full speed, even if you just plug in an extension cord.

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Have a EB5000X generator which has staring problems, aprx 8 yrs old and not used a great deal until hurricane Ike came thru here and it ran for several days with minimal down time. Afterwards I changed the...

If I understand the problem correctly, it runs fine after you cleaned the carb, but the auto idle will not engage when you put a load on it. First if it has a switch to turn the auto idle off try that. if it does not rev up, then the magnetic controller is stuck. There is a magnetic coil which is connected to the throttle and this either pulls or releases the throttle when load is applied. My guess is that this is hung up a bit. Look for a small round coil with wires coming off it that is connected to the throttle assembly. You could also try tracing the wire from the auto idle switch backwards. This may just be stuck in the idle position by corrosion. especially if you live in a humid area or one near the ocean. gently try to work it a bit by hand (when the generator is not running) and try a bit of wd40 or the like.

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Honda 7000w generator outputs 6vAc when idling. When I rev it, power is then supplied. Why?

Well I dont know, but I do know that when it idles nothing is going to work. So whats the use of having a generator idle? Generators must turn at 1800 or 3600 rpm to operate.

Mar 13, 2010 | Honda Electrical Supplies

1 Answer

Honda 1000 starts, runs but when power save

from not using the generator the plunger which activatesthe electrical contact is stuck. Race the engine by finding the throttle and after a few revs it will kick in

Oct 23, 2009 | Honda Electrical Supplies

1 Answer

Engine missing

Get a DMM that can measure frequency (Hz), then check that with no load and the idle control set to off the frequency is 61.5 Hz - If it isn't you have to troubleshoot why it isn't and correct it.
You should also check the idle control mechanism if there is one on the generator, with it on the generator should start up at regular speed, then slow to idle speed, then rev back up to regular speed when you draw current from the generator. To check it use the DMM to measure the speed at startup ( should be 61.5 Hz), when it idles down (about 37 Hz), when you're drawing power from any other outlet ( pretty close to 60 Hz). If the generator has idled down and you shut off the idle control it should rev back up immediately.

Please rank my solution,

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