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Generac 50g wont stay running - Generac Guardian RV Guardian RV Generator - 4800 Watt, Gasoline, Primepact 50G, Model

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Generac NP 50G hard to start. When it does start runs for awhile then rpm starts to go up and down.

low fuel supply
check tap for internal corrosion/blockage
check filter at end of tap( in tank) for blockage
check hoses for internal failure

Aug 20, 2016 | Generac Electrical Supplies

2 Answers

Why does my Generac 3600 start,, but won't stay running?

Does it stall when open the choke? If yes, thoroughly clean the carb.

Sep 06, 2014 | Generac Electrical Supplies

1 Answer

Where are the exciting field wire fuses located

Try putting 12 volts DC across the commutator coils at the brushes, sometimes the generator looses it's magnetic field and this could possibly restore it but make sure it is a low current not a car storage battery.

Good luck,


Jul 16, 2014 | Generac 5 kW, 60Hz Model PrimePact 50G RV...

1 Answer

I have a generac 50G. How do I flash the field so it will generate?


This is the easiest way, get a hand held power drill and plug it into one of the 120 volt recepticals. Make sure all the cicut breakers are pushed in before you do this. OK here is the trick, with the generator running, pull the trigger on the drill and spin it hard BACKWARDS. You must keep the trigger pulled and DONT hangonto the chuck after you spin it......... It will just take off spinning. If it doesnt work at first do it again, if it does not work, make sure you are spinning it as fast as you can. If the drill motor does not just take off after three attemps, you might have a bad diode that needs to be replaced.

Hope this works, Let me know :)


Dec 04, 2010 | Guardian Rv Generator 4800 Watt, Gasoline,...

1 Answer

Generac NP 50G wont crank

Measure voltage drop across the far ends of the fuse wiring (should measure zero), as one of the wires or it's connection to either end of the fuse may be open. Check the battery negative grounding connection at the frame. If all ok, you may need to find a wiring diagram for the machine. Does this unit have a low-oil-level switch which will kill the engine if set?

Oct 28, 2009 | Electrical Supplies

2 Answers

Generac NP 50G Stops after 2-30min.

check the oil sensor circuit. I know when I take out or short out the sensor ckt on mine, it'll keep on running. low oil isn't good for any motor.

Oct 20, 2009 | Generac Guardian Ultra Source 15,000 Watt...

1 Answer

Generator Starts But wont stay running after a few mins.

check the oil level most products like this have a safety valve.

Jul 15, 2009 | Generac 5622 GP Series GP5000 6,250 Watt...

2 Answers

RPM/voltage fluctuation on Guardian Primepact 50G

go to - look in their Service manuals section - good luck!!

May 28, 2009 | Guardian Rv Generator 4800 Watt, Gasoline,...

1 Answer

2008 Gaurdian Generac 3cyl diesel shuts off after hitting bump

If you dont find a solution here. Call Generac in Waukesha WI. and get the number for Robert Schwalm Co. He is the best in the Country for Generac I used to be #2 but I havent worked on all the new Generacs. Give me an old RV unit and no one is faster!

May 20, 2009 | Guardian Rv Generator 4800 Watt, Gasoline,...

2 Answers

Generac Generator won't stay running

It sounds like you are not producing any voltage. When you start your generator have a volt meter on the generator breaker to see if there is voltage present when the genset is running. Also, check you oil pressure switch, which is near the oil filter.

Apr 11, 2009 | Electrical Supplies

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