Question about McCulloch Electrical Supplies

1 Answer

McCulloch 5700AK No voltage from running generator circuit breakers?

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert who has written 50 answers of more than 400 characters.


    An expert whose answer got voted for 20 times.

  • Expert
  • 72 Answers

My answer:

Not having any background info as to how old your model is or - TOTAL RUN HOURS unknown as well? - I can only give you several possibilities of what the electrical/electronics problem might be - even though I don't know the exact model # and which engine you have on your Genset.

McCulloch, Coleman, and many others as well do not mfr much of anything inside the USA today - let alone factory service anything they sell, but like with many other USA companies out there today they do private label out to a lot of mfg vendors (mostly in China btw), and the Genset gas engines are numerous to say the least. From Briggs & Stratton to Honda to Subaru and so forth...not to mention the generator heads as well. Again - all made in China.

I also don't know what normal LOAD you are putting on your Genset there, or have been putting on it previously, or at what RPM you are normally running the engine at - as to half throttle or full throttle setting?? The heavier the electrical LOAD the more heat the generator head had to dissipate as well. Is the generator venting clear and free from dust, dirt, and any obstructions? I take it that it's most likely a Briggs & Stratton 4-stroke single cyl, or else it's a Honda 4-stroke single/twin cyl engine?

Has the gas engine always been serviced properly as to scheduled fuel filter changes, oil changes, air cleaner maintenance, etc? These are just as critical so as not to burden the generator head output as well. If the generator head runs extremely HOT then you definitely have a problem there. Internal short, bad winding, etc.

Which brings me to the next point.

Since I take it that it has been running good up to now - I have a few ??'s as to how you have been running it recently, and how well it's been running generator-head wise?

Has the output voltage been really stable and clean up to this point or has it varied at lot?

Have you actually measured the AC output voltage with a good quality DVM set on the 200 volt AC scale? If so - what voltage was read? How stable was it - as to any notable variations?

Did you compare your DVM readings/findings to those listed in the Operator Manuals spec listed?

Btw - are all the output outlets totally dead? Is so then it's not the breakers at fault. Not if the engine runs OK, and at the proper RPM settings as well.

Beings your Genset is probably an older model - it just indeed might have some high RUNTIME HOURS on it. If it does it just could very possibly be what sounds like to me (and I personally HAVE SEEN this happen myself firsthand) that the generator brushes are nearly shot - as in almost worn out. Or in your case - TOTALLY GONE. If there is some brush length there, but not enough by spec then they may be getting too too hot - as from excessive current draw at point of contact, and thus the generator sensing circuitry itself is doing a complete electrical CUTOUT!!

An added protective Genset circuit feature in that the generator itself may indeed be linked to the engine as a type of REV LIMITER or CUTOUT on the Maintenance-free Magnetron® electronic ignition. Again - your operators or service manual should have a pretty good troubleshooting section in it unless you don't have that anymore or never got one if you bought it used to begin with.

If you unscrew & remove the Generator brushes, and they are indeed below the recommended length (or worse case they are indeed totally worn down) then that most likely is your problem right there.

If you choose to replace the old brushes with new ones yourself - be very careful when seating the new ones - as to their insertion and cap retainer tightening. Never over-tighten those black plastic-like brush retainer screw caps - for if you break one (hard to get immediate replacements is why), or fracture one it could cause the Genset to fail under LOAD, and that very well could do some severe damage to the generator part itself. Take your time doing it, and be patient!!

It has to be one of the scenarios listed above, as I've covered every possible cause short of a broken or shorted wire somewhere - which in that case you will have to schematic trace and Ohm out wire to wire contacts. This being the least likely scenario from my experience.

Please post me a reply as to the found problem there, and the resolve to it by following my recommendations above. Also please rate my troubleshooting fix as well.

Keep me posted and I'll follow up as well.

Best regards,


Posted on Sep 03, 2008


1 Suggested Answer

  • 2 Answers

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

a 6ya Repairman can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Repairman (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

3 Answers

Troubleshooting for craftsman 2400 watt generator motor Runs producing no electric power

Hi Kimber:
Check to see if there is a circuit breaker that has tripped.
Can you tell us what happened immediately before the "no power" situation occurred?

May 10, 2015 | Electrical Supplies

1 Answer

Generator will run but no voltage output

Check the obvious, make sure the breaker is on, as this genset requires that breaker to be closed. Check to see if you have power on the generator / not laod side of the circuit breaker. If you do then the problem is the breaker, if not you need to dig deeper, and mesure the stator resisitance, most likely is the rotor excitation capacitor is open, this was common on those units, and will prevent excitation.

Renee @

Nov 14, 2013 | Powermate Coleman Standby Generator...

1 Answer

The motor is running but it is not generating electricity.

Here's a link to your manual:

No power is a result of a break in the output circuit of the generator. The most likely places for this to happen are at connection points and moving parts designed to open and close manually and automatically. These include terminal screws and push on type connectors, switches and circuit breakers.

Before beginning, you should follow the troubleshooting chart for "..No AC Output" on Page 21 of the manual.

Since there is a great deal of vibration on the entire unit, it is not unlikely to have open connections where there shouldn't be. A careful disassembly of the control box with the unit off and disconnected from the electrical panel should allow you to poke around without fear of shock or burns. It would be a good idea to take a picture or two of the connections when you open the box - before disconnecting anything. otherwise, be sure to label wires and terminals for anything you take apart.

Look for evidence of arcing or sparking. This is usually a blackened area near a terminal or wire. Clean the contact area and determine where the connection point is supposed to be and complete the circuit as per the schematic. Check for loose wires "floating" in air (aka not connected to anything). Reconnected as shown by the schematic. Next, apply pressure to all terminals and connectors to find any that are loose. Resecure any found. pay attention to those on DP1, DP2 and the 240 volt 30 amp outlet.

Using the schematic on Page 22, check the 25 Amp circuit breaker identified as CB1 by removing wires 11A and 44A from this circuit breaker's terminals. Use a multimeter set on Ohms (or resistance), set and zero to the lowest range, and test from the terminal with the #11 wire on it to the terminal that had 11A on it. With the circuit breaker ON, it should read less than a couple of Ohms. This is a closed circuit indication. Repeat tests with terminals 44 and 44A. If you lack a meter, you should be able to use a continuity light (this will cause a light to illuminate when there is a good battery in it and there is a connection or path between the probes of the light). The meter resistance should indicate an infinite amount of resistance when the circuit breaker is turned off (as the light should go off when the circuit breaker is turned off, too). This is the open circuit indication. If the meter never indicates a closed circuit with the breaker ON, the breaker should be replaced. If it works as expected, reconnect the 11A & 44A wires to their original terminals.

Continue to test each CB2 and CB3 the same way. Remove wire 11B from the terminal of the circuit breaker and test from wire 11A to the circuit breaker terminal that 11B was connected to. With the breaker ON, it should show as closed circuit. When off it should show open circuit. If not, replace the circuit breaker. Reconnect 11B to the circuit breaker terminal. Lastly, move to CB3 and Remove wire 44B from the terminal of the circuit breaker and test from wire 44A to the circuit breaker terminal that 44B was connected to. With the breaker ON, it should show as closed circuit. When off it should show open circuit. If not, replace the circuit breaker. Reconnect 44B to the circuit breaker terminal.

The rest of the check out requires that the generator is running and voltage measurements be taken. As little as 50 volts can kill under the right conditions, so extreme caution must be exercised. If you have never worked on these systems before or are
not completely comfortable working with voltages levels this great, you should stop at this point. Otherwise, check for the presence of 240 volts on CB1 terminal 11 & 44. If not present, there is a problem with the voltage regulator or generator windings themselves. Repairing or replacing these parts may not be worth doing depending on age of the generator, etc.

I hope this helps & good luck!

Jan 11, 2012 | Briggs Stratton Portable Generator 305cc...

1 Answer

I have a 5700 11 horse, (brushless). the windinds appear to be good,none burnt or open, but I have no output voltage. Any ideas?

Some generators have a wiring harness plug. Unplug harness and test for output there. If no output at harness, look for open circuit breakers and test any capacitors in system wiring. Some brushless systems use capacitors to excite armature. If diodes in armature are faulty there will be no output. Generators output two circuits of 115v each when combined will be about 220. If your generator has two 115v plugs each plug will be on a seperate circuit. To verify condition of stator windings, apply low ac voltage (8 - 12v ac less than one amp) to one of the 115v plugs and you should be able to read same voltage on second plug and double the voltage on the 220v plug. Good luck

Nov 09, 2010 | McCulloch Electrical Supplies

1 Answer

My generator turns on but, supply's no power?

You must check:
  1. Are your breakers ON?
  2. Measure the voltage on generator terminals.
  3. If the voltage is less than 20 V AC, you should check the excitation field, rings and brushes, AVR - rectifier, cables and fuses.
  4. If every thing is OK you may need to recharge the DC field with a short connection of "+" and "-" of a 12 V battery to respective field terminals when the engine is running.
  5. If the AC voltage raises for a second and drops when you disconnect the battery - the excitation circuit is bad.

Jul 13, 2010 | McCulloch FG7000MA 7000 Watt 13 HP 389cc...

1 Answer

McCulloch Generator model FG6000mk 11hp run good until I turn on generator then stop running do you think the generator bad and can it be rebuild ?

I did not understand how you turn on generator, as it is always turned on.
If you use the ON/OFF switch it is stopping the prime mover.
If you reset the AC breaker without load, and it stops - it means that you have short circuit after the breaker. Check the output receptacles.
Try this link: 

Jun 12, 2010 | McCulloch 13HP 338 Cc Portable Generator #...

1 Answer

Genset starts and runs fine but the 30 Amp circuit breaker trips as soon as a load (AC) is applied. Started right up, ran half a day, but now when it starts the minutes I click on the ac the circuit...

What about when you have it powering the motorhome, without AC on, does it trip then? Do you have anyone you know with a multimeter and knows how to use it? How about buying a plug in voltage meter at a hardware store as a good start. You simply plug it in to a receptacle in your motorhome and it will tell you the incoming voltage and they are not very expensive. That will help diagnose generator problem.

Nov 01, 2009 | Watts Onan Portable Generator - 4000 ,...

1 Answer

Shorted out generator??

they do smoke if its petrol lol joke sounds like a short circuit check the connections

Jun 08, 2009 | McCulloch 13HP 338 Cc Portable Generator #...

2 Answers

McCulloch fg6000mk: generator motor runs, no power.

You need to trace out the power wires the come out of the genset. They will end up on a breaker. With a volt meter measure both sides of the breaker. If one side has voltage and the other side doesn't, then your breaker is opened. Press the breaker in closed to see if it actually closes. If it don't then you will need a breaker. However, if no voltage is being produced, it is possible that the voltage regulator let go.

Apr 11, 2009 | McCulloch 13HP 338 Cc Portable Generator #...

Not finding what you are looking for?
Electrical Supplies Logo

Related Topics:

454 people viewed this question

Ask a Question

Usually answered in minutes!

Top McCulloch Electrical Supplies Experts

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers

John Trevino

Level 3 Expert

1388 Answers

Roland W VanLue
Roland W VanLue

Level 3 Expert

486 Answers

Are you a McCulloch Electrical Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides