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Low voltage Voltage is about 98v with no load. It will increase if I advance engine speed by hand. When I put it under load, voltage drops but engine speed doesn't increase. Again, if I increase engine speed by hand, voltage will rise.

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Welcome.
I am the owner of the generator YAMAHA EF 600. During the last exit on the nature of the generator produces a higher voltage. Instead of 220 volts produces 450 I have spoiled all the light bulbs in the lamps.
Changed item12 7H5-87105-01-00 RECTIFIER ASSEMBLY . It did not help.
Please help to solve this problem

Posted on Sep 26, 2014

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I have a brand new Nothernstar belt driven generator, I set the engine speed with no load to produce 61.5Hrz but the voltage remains low at 103VAC. When I switch on some load (an AC Unit) the frequency drops to 60.5Hrz but the voltage stays at 103 VAC.

Posted on Jul 19, 2013

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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

Posted on Nov 30, 2008

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Low voltage


Go to an Autozone, Oreilys, or Advance store and ask for a charging system test.

Sometimes when a battery is bad, it is beyond the Alternators ability to keep it going from Low RPM. This is why the voltage drops so much at low speeds.

Mar 24, 2014 | 2000 Ford Crown Victoria

1 Answer

AC voltage is 275vac on the powermate generator model # PM069250......engine speed is 3750 rpm (max is 3600 rpm)......how do i lower the speed and the 275vac to a nominal 240vac output.There is no expert...


On the engines carb. is a governor rod should connect to the front case of the engine. This rod should have an adjustment to slow the engine speed. BUT,,, are you reading the generator unloaded or without any thing plunged into it? Once you have the generator loaded with a device, the voltage should drop to a constant 240vac. 150 rpms should not make that big a difference on the voltage output, and if running under load the RPM's should drop also..

Sep 04, 2011 | Acabion Helix Motorcycles

1 Answer

My generator only puts out 89 volts.


I need a model number for your ENGINE not the whole generator. I believe this is a case of the engine not running fast enough. I.e governor adjustment will be necessary. Respond with an Engine model number and I will stll you how to adjust the governor speed.

This is GENERIC but the Governor arm has a spring that connects to a speed plate. The speed plate has a stand off screw and nut used for speed adjustment and a center nut for securing the speed plate in a fixed position. The Steps are to slightly loosen the center nut and the locking nut on the speed adjustment screw. Start the unit with a meter reading output power voltage (use extension wire for meter) Then turn the speed increase screw in to increase speed. When you reach 122-123 VAC stop. The reason you adjust it to 122-123 VAC is because voltage will drop as the generator provides power loads
Tighten the screw lock nut while running if possible and tighten the center nut on the speed plate to secure it in place. Check voltage again.

If you generator is running at normal speed and you have low voltage output... most of the time the Capacitor is failing. If the capacitor is failing the magnetic field in the armature and stator collapse under above average loads causing HUGE voltage swings.

Thanks for choosing FixYa,
Kelly

Aug 29, 2011 | Briggs & Stratton Electrical Supplies

1 Answer

Hello, my Briggs & Stratton generator, PP5000, Intec, 8 hp, Model 202412, type 0167E1, has lower power output, 180 Volts in stead of 220-230 Volts. Any idea where I should look ? Engine is 8 years...


Hi and welcome to FixYa. I am Kelly

Usually when you have a lower voltage output that is yet above 150 VAC the problem is as simple as the engine is no longer running at full speed. This could be caused by binding carb or governor linkages but more often than not the Governor adjustment screw has backed off over time causing the engine to gradually slow so the output voltage drops. The user does not notice it so much until the output drops more than 15% and you notice dim lights... slower running equipment etc.

Look for a circular plate / governor speed plate near the base of the governor lever but off to one side that has a spring that attaches to the governor lower end of the governor. There should be a screw with a locking nut. Loosen the nut and turn the adjusting screw clockwise to increase engine speed. (You may have to barely loosen the pivot nut on the governor speed control adjustment plate to make the speed adjustment.... tighten when done with speed adjusment) Watch your output voltage and adjust the voltage to 225 VAC with NO LOAD. The voltage will drop as loads are added. Make sure to tighten the lock nut on the adjusting screw or in a matter of an hour you will have low voltage again from engine speed dropping. What ever you do.... DO NOT adjust the governor arm base attach point where it attaches to the engine.

Just so you know a weakened governor spring can cause the speed drop also. If the speed keeps dropping with extended use, you may have to change the spring that goes from the lower end of the governor arm to the governor speed adjustment plate.

Thanks for choosing FixYa,
Kelly

Apr 20, 2011 | Briggs & Stratton 3,250 Watt 6.5 Hp...

1 Answer

I have a coleman 6000. It runs for a whileand when I load it up it trips off.


Make sure the governor is working properly. When you put a load on it the engine should increase in speed slightly. Make sure the engine is running at the correct speed 3600 rpm. Try plugging in an item that draws less power such as a electric drill and see how the generator behaves. Also make sure the engine runs smooth while not under any load. Check the voltage from the outlet to make sure it is putting out 132 volts not under load.

Mar 14, 2011 | Coleman Powermate Proforce 6,000 Watt 12...

1 Answer

7 hp brigs engine on my generator runs two fast producing 127 volts. how do I slow it down?


Hi and welcome to FixYa. I am Kelly. Since you did not mention the make or model number of your generator I will respond in generic terms. If your generator is at 127 volts with NO load it is adjust at the very top end of the manufacturers limits. There is a 10% tolerance so 120 VAC + 12 is 127 VAC. Under an electrical load above 500 watts the generator should drop the output voltage slightly so your generator would still be within factory limits. Personally on any generator as a repair person; I set the output voltage at 126 VAC no load so that when the user puts the generator to work the output voltage is good. If your generator is running at 127 VAC under load then you can adjust the governor screw on the governor plate CCW about 1/2 turn to drop the voltage. Without a generator model number or engine number I can not tell you exactly where the governor plate is on your engine / generator. The screw will have a lock nut that you must loosen 1/4 turn then turn the adjustment screw CCW to drop the voltage. Just make sure to re-tighten the lock nut when the adjustments are complete. Mind you by decreasing the output voltage you also drop the output freqency at the same time you decrease the output voltage. It is better to have 125 -127 VAC under a no load condition as the more electrical load you add the more voltage drop you will notice. It is best to adjust the generator to 122.5 -123 VAC under a medium load. (50% of output capacity) A bread toaster is 1400 - 1600 watts and is a good load for a 3000 watt generator. Also a good hand held hair dryer will use around 1600 watts. If you use this type of load and the voltage output is 122.5 to 123 VAC I would not adjust anything. I have been working on generators since 1970 so this is nothing new for me. I hope that you understand everything I posted. If not, feel free to ask as many questions as you wish in any future response.
Thanks for choosing FixYa,
Kelly

Jan 08, 2011 | Craftsman Electrical Supplies

1 Answer

Volt gage jumping arround less notice when under load


I would first suggest using a volt /amp meter and test the voltage from the large wire off the back of the Alternator. You will need a second person to help feather the throttle to change the engine speed. You should see a steady increase in voltage from 12.6 to 14.5V when the idle is increased. If the voltage jumps around on the meter then chances are you have a bad voltage regulator in the Alternator and need to replace it. If the voltage is normal and doesn't bounce around then you have a faulty gauge in the dash.

Jul 31, 2010 | 1995 Chrysler LeBaron

2 Answers

1998 k1500 5.7l 105a alternator. replaced


Now change the sulfated batery for a new one.
Vitally

Sep 09, 2009 | 1998 Chevrolet K1500

1 Answer

Volt gage drops when not accelerating, replaced battery and altenator, its running worse now


What are the voltage readings?
Voltage may drop when idling and a larger voltage drop can be present when a large load (amp draw)is present on the alt.
A low charged battery is a large load.
Operating accessories is a large load.
A slow spinning (idling) alt will not put out it's max output.
This would be normal.

We like to see.....above 12.7V at idle....max 15V.......
.......and a min of 13.5V to a max of 15V at higher engine speed.
If you are with-in this.......don't worry about it.

Aug 27, 2009 | 1992 Buick Century

1 Answer

Portable generator low voltage


85 volts represents residual voltage. It is possible that your unit sat for an extended period and lost it's magnetism or the excitation system failed under load. check your manual for a procedure to "flash the field". If that is not successful, e-mail me and I'll tell you how to trouble shoot the failure.

Jan 02, 2009 | Novelty Manufacturing Older Than Dirt...

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