20 Most Recent Generac 13,000 Watt / 13,000 Watt Home Standby Generator - Page 2 Questions & Answers

Just happened to find a copy on-line for the Generac V-Twin GT990 Engine Service Manual.E-Mail me : [email protected] and I'll send you the PDF File for that. Good luck with your repair.

Leigh, See my 5/22/12 comments on my "overspeed fault" problem resolution [Generac 43903 standby Generator overspeed indicator on starting] . If it only runs for a few seconds and then quits, you may have a similar condition to the one my unit had. A good technician should be able to diagnose the problem and determine if you have a similar failure to the one I had, or one of the other causes suggested by RSG000.

well I have a special flasher unit but I believe you can put 12 volts to the brushes while it's running. That should do it.

These type of gens have a low oil shutoff. Check the oil. Always have spare spark plugs, a cheap fix. My gen always wanted a new plug every year. Look to see if it has a fuel filter.

Hi and welcome to FixYa, I am Kelly.

With a new carb and the symptom of it starts and dies this sounds like one of the generator safety circuits is tripping the unit off line.

Safety circuits are.
1. Low Oil Pressure
2. High coolant temp
4. Under / over voltage
5. Under / over Frequency
5. Low Battery
Any one of these being activated shuts the unit down via the control board.

If you respond with a model number I will dig up the manual.

Kelly

Hi Richard,

Welcome to fixya!

Here is the manual for your generator: http://www.generator-parts.com/manuals/home-standby/0E3586.pdf

Copy and paste this web address in your browser and the document will download for you.

Hope this helps you get it fixed.
When you accept this solution, please place a vote. Thanks,

Handie Andie

sounds like the throttle linkage is binding.
joe

probably but it may be a streck 1300 watts may do it but it depends on the draw of the welder and it will be maxed out thats 13 100 watt light bulbs running at the same time use common sence

Starting fine and then surging is a result of debris in the carb float bowl in most cases. Remove the float bowl and cler out the debris or water. Also.... a clogged fuel filter can cause this same symptom as can a bad fuel pump (if equipped.) Lastly check inside the feul tank looking at the tank port to carb main fuel line for obstructions.

Check fuel flow to the carb at the carb connection. It should pass about 1 cup of fuel in less than 10 seconds. If it does not do this you have fuel supplu issues. If it does do this... for sure there is debris in the float bowl. Make sure to clean the bowl nut (if equipped.) The surging is causing voltage or frequency faults as the engine speed is not constant. (Normal for the unit to shut down when this happens)

If you have a hand held propane torch... you can use it unlighted to test for vacuum leaks with the engine running. The engine will speed up where ever there is a leak. Just barely open the torch flame control valve but do not light it. The engine should speed up as you pass near the actual air intake but no where else. I do not at this time think you have a vacuum leak. I think you have a fuel management problem via a dirty float bowl or restricted fuel supply.

Thanks for choosing FixYa,
Kelly

This manual should have what you need:

http://lawnandgarden.manualsonline.com/manuals/mfg/generac/86640.html

Click the link: The click on the image then wait for popup window... Close popup window click on get this manual.

It is published by Generac

Thanks for choosing FixYa

Kely

This is usually to do with the "Prime", often ambient temperature has a lot to do with starting.
PRIME the LP gen set at least 5 times on the prime/stop switch (I will have to go look at this to see exactly what it says)
Then HOLD the Start button down until it starts. And, believe me, it will have to be HELD down longer than what you would desire. It cranks until it DOES actually start.
Also make sure that the air filter isn't blocked, or obstructed, in any way.
as with any engine check that you have both fuel and spark at the plugs - you can get one of those spark testers at any small engine or auto parts supply and check to make sure you have a good strong spark- a gas engine will usually ignite with a weeker spark but a propane will be harder to ignite and if the spark is week enough may not start at all- second thing to check for is the propane system- the ealier Emeralds had both a liquid and a vapour withdrawl systems- the way to tell what system you have is how the regulator is mounted -liquid will have the reg. mounted horizontally, vapour has to have the reg mounted vertically to maintain calibrated gas pressure- the Onan manual shows a fuel filter for only the liquid system-(vapour systems have them to on cars) - if the fuel shutoff solenoid is before the reg and is beside the fuel filter then its a liquid system- if its hooked in before the vertically mounted reg then it's vapour- if you have experience working on propane systems then get the Onan manual and try to fix it - if not then I strongly suggest you take it into a shop because as you know propane can be very dangerous to work with if your not familiar with it and the safety procedures and equipment that a technician uses to service the systems- if you had it in a shop and they changed the filters then take it back and let them know that it stopped running -see if they can do something about it- also they should check the system (genset fuel supply system) for the proper operating pressure- vapour requires between 9-13 inches WC and liquid systems operate under the same pressure as in the propane container -(this can exceed 200 PSI) - one word of caution- check the system for leaks before you do any testing


If none of this fixes you, then I feel it's probably time to call a professional.
As you may have a problem with your ignition or gas delivery system. etc.

If the generator is installed correctly and it is running within it's continuous rated capacity, it can run indefinitely. The main thing is operating temperature. Just like a car engine, once it comes up to normal operating temperature it's cooling system should be able to keep it from overheating. But unlike a car, where the manufacturer has complete control over the installation, a standby generator could possibly be installed in a way that inhibits proper cooling. However, this is very unlikely if the unit was professionally installed. And even if it did overheat, the unit should be able to trip it's own breakers or shut itself down anyway. The only other consideration is fuel consumption. A standby generator is not an economical way to get your electricity. If it runs for several days or weeks you are going to notice the fuel bill. I hope you found this helpful.