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I have a generac generator 19kv propane powered the engine works fine but produces no ac power?

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Pull the no 1 and no 4 wires off the voltage regulator and apply 12 vdc from the battery to them + to no 4 - to no 1. start unit and see if its putting out at least 60 VAC. If it is then you have a bad voltage regulator. If itis not then you have to investigate the brushes, stator, and rotor.

Posted on Nov 18, 2009

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I need a rectifier or avr for generac 3500 xl genarator


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    Why does it crank and almost start on 1st try?


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    My Generac HSB 17W AC Model 0055040 Generator will crank but won't catch and run. Propane tanks are full and have never been empty. What can I do?


    Check for igntition at the plugs, check power is going to fuel solenoid. If power is on solenoid check LP pressures and make sure it is opening. Be carefull LPV is dangerous any spark can cause a fire. Check to make sure the throttle is opening during cranking, if it isn't it's a control issue

    Oct 12, 2013 | Generac Guardian Electrical Supplies

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    My generac 7500watt propane generator ,back fires,,i change the plugs and a few days latter and it starts back fires again


    Check the air filter. Then mixture. Then propane level supply. Or reverse the sequence. Which works best for you, go with.

    Oct 06, 2013 | Generac Electrical Supplies

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    I have a Generac 60kw generator. When it runs under load the generator surges, causing the lights to go up and down. The only way to stop this is if I reach into the generator and grab what I think is the...


    You did not specify fuel. If running natural gas or propane, check the diameter of your feed line. You need at least 1/2 to 3/4 pipe diameter on the NG or propane. At 60KW I would guess at least 3/4 maybe larger for NG.

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    Need adjustment procedure for a Generac Centurion generator, carb and regulator under full load


    Before you adjust anything, suggest you verify gas line for proper pressure and importantly volume. Pressure for gas should be 5 to 7 inches and propane 11 to 14 inches W.C. Also make sure the line to the generator is sized properly and the gas meter is a high volume unit (if NG). 90% we find the problem with generator sunder load that otherwise are fine are fuel related. Good luck.

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    Installed a generac 20kw about a year ago, ran fine untill 2 days ago. During a utility outage, generator ran for about 30 minutes and then stopped producing power while still running. All mains were still...


    With the engine off, check the exciter brushes and slip rings which supply magnetic power for the alternator winding in the stator. Also, check the motor-to-alternator mechanical coupling. Check the breakers for tripping. To service beyond this point requires a schematic of the alternator, a voltmeter, plus knowledge of what the schematic is telling you. Good luck!

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    No power output from my generac 5000 power plus.


    sounds like you need to "flash the field". This means you've lost you excitation voltage for the generator to produce electricity. In most cases you need to get a 9volt battery and connect it to 2 & 6 inside the generator. They are Blue & Red wires, but they are not the only blue & red ones there. The generator should be running and the battery should only be connected for about 5 seconds. This is very dangerous because of all the high voltage and democrats.

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    20KW Guardian Generac does not produce 12 volts to run engine


    The problem is that the printed circuit board inside the generator draws a little current from the battery even when the generator is not running. Over the course of a few days this can make the battery weak enough to be unable to get recharged by the built in running charger which results in not enough power to run the electronic governor on the generator. Usually the spark plugs will work even with a fairly low battery.

    Most of the Generac generators come with a built in trickle charger that runs off of the transfer switch load terminals. If your built in charger isn't doing the job it's either broken or you have the wrong sort of battery installed in the generator.

    Regards,
    Carl

    Jan 11, 2009 | Electrical Supplies

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