Question about Coleman Powermate Portable Generator PM0435003

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At 3600 rpms generator produces 133 volts AC

At 3600 rpm generator is supposed to produce 120 volts 60 Hz but my unit produces 133 volts 60 Hz. How do I correct this issue?

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  • Coleman Expert
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You cannot, speed is propertional to voltage on these, as they have capacitor voltage regulation. Do not use this for powering home appliances, it is common to see this design and not a problem. If you add load and it will decrease but so will the frequency

Posted on Nov 15, 2013

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Posted on Jan 02, 2017

protek480
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SOURCE: Generator runs great but doesn't produce any power

There is a electronic module that senses load current that pulls the throttle up for high RPM. Fine the module and look it over, you may need to replace it.

Posted on Jul 04, 2009

  • 4 Answers

SOURCE: 5500 generator stopped producing eletric after

First check with the dealer and see if it is still under warranty. If it is not, make sure nothing is blocking the air flow around where the control modules are located. This could cause the voltage regulator and other electronic parts to overheat. Next check the brushes and make sure they are free of any dust or build up preventing them from making contact.

If everything is OK the next thing I would do is change the voltage regulator.

Posted on Nov 25, 2009

SOURCE: The coleman voltage generator for 250 kva gen set

Well I assume that this generator is NOT three Phase, and delivering 440 Volts? in that case, that reading is what is called and "Open Circuit" reading, with a full load, that reading will/should come down to the nominal voltage of 250 V (+/- 10%) This generator is a 250 V AC unit? If this is so then it is operating correctly? It is 5kw UNIT. using a digital multimeter due to it's large input impedance it will often give erroneous readings if NOT loaded down with the correct.any. load.?

Posted on Mar 03, 2010

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Generator low voltage


It could be several things but it sounds like it just running too slow. I would the engine rpms first. Depending if is a two pole or four pole and if your 60hz or 50 Hz on the needed unloaded rpms.

Example: 2 pole 60 hz. Engine needs to be running at 3600 rpm loaded and 3750 rpm unloaded; unless, it has a fuel saving mode.
A 4 pole 60 hz would running half this rpm. The 2 pole producing 50hz would have the engine running at 3000 rpm loaded (about 3100 rpm unloaded)

Now in order for the 50 hz system to produce the same output voltage it requires a different alternator than the 60 hz version; otherwords, You simply can't convert a 60 hz to 50 hz version without changing the alternator by changing the engine speed.

Dec 29, 2014 | Electrical Supplies

1 Answer

Only getting 80 volts


First check you engine's rpm. Your generator is a 60 hz unit it need to be 3600-3750rpm; if 50 hz then it need to be 3000-3100.

If voltage is still down and the rpms are correct then alternator's voltage regulation circuit needs checking. To do this you need to have make and model posted.

Dec 17, 2014 | Honda Eb 3500 Generator

1 Answer

High voltage rpm power generator output


Not sure what you mean "high voltage rpm power generator out", however many people have asked how to adjust the engine for proper voltage output. On generators with~out a voltage regulator, I adjust the engine RPM by using a digital voltage meter that has a Hz setting. Adjust the governor untill the meter displays 60 Hz. With the geneator producing 60 cycles, I know that the engine is turning 3600 rpm (the engine produces max hp when it is turning 3600 rpm). At this point, read the voltage output to verify that the range is between 115 ~ 120. On generators with a voltage regulator, verify/adjust that generator is producing 60 cycles then adjust voltage by turning screw at the regulator (some regulators are sealed with potting compound and can not be adjusted). If your power demands are not that great and you appliance can operate at 50 cycles, adjust governor as needed. Lowering to 50 cycles will also reduce output voltage. Good luck

Oct 10, 2011 | Coleman Powermate Powermate 5000W...

1 Answer

The generator produce onely 73 volts ac on the 120 volts plug and 146 volts ac on the 220 volts plug . what could be causing this problem


Check all wiring and fuses associated with you voltage regulator if they check ok, find a way to adjust your voltage regulator replace it. Make sure the unit is running at 3600 rpm as well and making 60 hz.

Jul 10, 2011 | Coleman Powermate Premium Plus 6250W...

1 Answer

My generator is not putting out the proper voltage? it's only putting out approx 75 volts on the 120 volt circit. i adjust the idle to full out and i get approx 112v.


Most low voltage conditions on generators are simply due to a low engine rpm. Most modern generators are 2- pole windings. So your engine rpm should theoretically run @ 3600 rpm. which will produce 120/240 volts @ 60 HZ. In actuality You want to set your rpm's @ Approx. 3720rpm no load. About 62.5 Hz. Without getting to technical this will give you your desired 120/240 volts loaded. Hope this helps.

Aug 09, 2010 | Northstar Electrical Supplies

2 Answers

I disassembled my EM650 Generator and to clean out


Most generators (except the latest inverter generators)
produce power directly dependent on RPM's.
The governor adjustment is critical.
This usually is in the form of an adjuster that through a spring, applies a preload to the governor arm.
The governor arm is attached to a shaft that disappears into the motor. Inside there is usually a set of weights that when spun faster will attempt to slow the motor and when spinning too slowly will attempt to increase revs. The adjustment you need to make is to the preload spring.
They are very sensitive to the motor being in good tune so do the air cleaner, spark plug etc before trying to get it right. Under voltage can do more damage than over voltage so take your time and get it to a good steady correct voltage with your usual expected load on it. A safety trip out box gives you a way to test voltage with a load on & some protection.
Work safe

Oct 15, 2009 | Electrical Supplies

1 Answer

No charge


You'll need to test to see if you are getting voltage from the brushes. This is a live test so, using something like alligator clips or such on the metal bracket of the brushes for your volt meter is a good idea. Simply start your generator with the volt meter leads attached to the the brush holders or exposed electrical connection to the brushes and see if they are producing electricity (120vac or greater). No voltage then it's your brushes, field, or stator. If they are good check the output of the voltage regulator. If it to does not kick down any voltage above 120 then it's your problem.

Note most cheap generators do not have a voltage regulator. All generators depend on the correct engine rpm to achieve normal voltage. 3600 rpm is the correct speed on a two pole generator to produce 110 to 125vac and 60hz (normally found on gas generators). 1800 rpm is the correct speed for four pole generators (normally found on diesel generators). You may set your rpms slightly higher to ensure that it's maintained underload ie 3750 for gas. Diesels usually have very good governors and don't need to be set higher.

Mar 29, 2009 | Coleman Powermate Powermate 5000W...

1 Answer

Honda generator em 1800


Honda generators are very reliable and are easy to adjust. The best way to check for proper output is to use a meter that can check cycles and voltage. Set meter to htz or freq and adjust the engine governor to 60 cycles. When the engine is turning 3600 rpm it is at max power and the generator may be producing ac voltage ranging from 115 to 125 at 60 cycles. When you draw power from the generator the engine governor will try to overcome the stress and maintain 3600 rpm. The engine must be well maintained to produce full power. Service oil, filter, plug and valve adjustment. Some engines have a spark arrester installed in the muffler that may become blocked with carbon. If engine is producing full power and voltage/amps is low then check brushes, capacitors, and/ or voltage regulator. Most problems occur when too much power is requested from rated generator. Example, trying to connect an 1800 watt air compressor to generator. The compressor may draw double the stated wattage upon starting and cycling. For longest generator life, It is best to use only 75% of rated output. On an 1800 watt generator use max wattage 1350. If you actually need to use 1800 watts then the best generator would be a 2500 watt. enjoy

Nov 28, 2008 | Electrical Supplies

3 Answers

Low voltage


Most generators use a flyball type governor within the engine to control rpm; also there is a voltage regulator that tries to maintain voltage at about 115v. The voltage regulator varies the voltage to the armature increasing /adjusting magnetic force. Use a meter with htz or freq setting to adjust engine governor to 60 cycles. When the generator is producing 60 cycles, the engine should be turning 3600 rpm, max power range. At 3600 rpm the voltage should be 115 to 120 volts. Loading the generator will cause governor to try to maintain 3600 rpm. Check engine manual for proper adjustment of gonvernor and linkage. The governor mech should last the life of the engine, however governor system does wear out. Expensive repair. enjoy

Nov 26, 2008 | Yamaha Electrical Supplies

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