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Generac generator 7500 won't start, It was backfiring at an idle last time it was running.please help, can't keep paying $84/day for rental!!

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  • Generac Master
  • 42,943 Answers

Try replacing the spark plug .

Posted on Apr 26, 2015

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Posted on Jan 02, 2017

  • 18 Answers

SOURCE: Generator runs, but does not generate electricity

Reset / tickled? There are resistors and diodes in the end of the alternators rotor (the bit in the middle that spins) If these look ok visually then change the capacitor which is a barrel shaped object usually with 4 prongs on the end. Without a capacitor the genset will not produce a voltage.

Posted on Sep 19, 2008

  • 26 Answers

SOURCE: how do i flash my generac 5000 power plus generator

its the rotor ,the stater ,voltage regulateor or control board. i fix these everyday. it also just be the brushes.

Posted on Jul 14, 2009

  • 14 Answers

SOURCE: Generac 43903 standby Generator overspeed indicator on starting

I have a generator that did the same thing. It would start and then stop within a few seconds. The more expensive generators have an oil level safety switch to prevent the engine from burning up. There is usually a wire connecting to the switch on the outside of the engine near the oil fill hole. Remove this wire and try to start the generator. If it runs without a problem then it is the switch. You need to remove the switch and take it apart carefully and clean it. There is a small float inside the assembly. When the oil runs low the float allows the switch to short to ground which kills the spark to the spark plug. Hope that helps.

Bob Janelli

Posted on Oct 01, 2009

Testimonial: "This is good information in the event that the low oil switch is part of the problem."

  • 10 Answers

SOURCE: I have a 17kw generac generator that will run

I have the 18KW model and was told that most alarms relate to a low battery. Make sure the battery charger in the Transfer Switch is properly feeding the battery or hook up a mobil battery charger to the battery and see if the alarm goes away. Good Luck.

Posted on Oct 12, 2009

  • 1 Answer

SOURCE: Generac Guardian 15 kw overspeed fault

Did you remember to set the overspeed shutdown threshold on the control board?

Posted on Jun 07, 2010

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If it is old and unused, it probably needs fuel system cleaned out. Carb needs to be removed and cleaned inside and out, fuel lines need flushing, filter changed and if it has an automatic choke, it needs to be checked because it sounds like it is stuck on.

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