Most modern high rpm generators are very trying to put this delicately overrated as to capacity. Many of them are a salesman's pipe dream., as in the salesmen are smoking wacky tobaccy in their pipes. You see a lot of them that will be labeled 8500 watts, when in reality if you put a continuous 6000 watt load on it they go up in smoke. As far as starting surge don't believe the stickers on the genset or the manual.
The XG Series of portable generators from Generac combines premium features with rugged construction for. Generac Power Systems, Inc. Service providers,. I've got an older Generac 10000 exl. The engine runs fine, it generates 120v and is adjustable. Problem is that it's only giving 43hz, under load or not its about the.
A generap 10 kw rated will possibly pull a steady 8 kw for periods of time. That is until the 3600 rpm engine gives up the ghost or the magic smoke comes out. TJ, The issue is like a glass ceiling, you wont see it until you hit it and release the magic smoke. Your machine from factory and in theory the gen head can produce 10k watts running and 12 k surge, but all is dependent on the prime mover. Now Ed is right on the money, I would expect a consistant 8k watts from your machine, anything more and the engine will begin to have a hard time keeping up on frequency. Ideally, a proper tuned genset prime mover given the run/surge wattage, the EXL should be able to at least give you 10k surge watts without much issue, and while capable of doing 12k watts, its not recommended.
It will shorten the life of the machien real quick. Rule of thumb with generator sizing is to find the max amount of running wattage you need, and size the generator to run that running wattage at 65-80% of its running capacity. I'd look more closer to 65% if you have alot of inductive loads kicking on. According to the manual, Maximum Surge Watts.12,500 watts Continuous Wattage Capacity.10,000 watts Power Factor.1.0 Rated Maximum Continuous AC Load Current: At 120 Volts.83.3 Amps At 240 Volts.41.7 Amps Phase.1–phase Rated Frequency.60 Hertz Fuel Tank Capacity. Gallons Shipping Weight.300 lb.
I've got an older Generac 10000 exl. The engine runs fine, it generates 120v and is adjustable. Problem is that it's only giving 43hz, under load or not its about the same. I've found that I can run lights, but motors don't like it. I've been lurking for days now in the dark,since there is still no power, and the info here is very good.
I'm hoping someone can give me a clue. I'm a carpenter so if I can hit it with a hammer I can fix it. I'm not bad with a wrench either, but electronics is not my thing, I can do the basics though. From what I've read I suspect the system control board, it's #84190 rev G, even says Generac 1995 if that helps.
Any clue would be greatly appreciated. Ok, by the fact that 'motors don't like it' I'm going to assume that the frequency meter is telling the truth and it's really running slow. Usually, that slow would be putting a pretty good strain on your regulator and exciter circuitry attempting to keep the voltage up. I am not familiar with the control on that generator, but as you have probably gathered, the engine governor is what sets the frequency. I would see if there is external linkage to the throttle that you could push on to see if the engine can get to 60 hz. Then if that works and the governor puts it right back on 43 again, you must diagnose further.
Generac 10000 Exl Service Manual
Pictures of your governor and carburetor/throttle linkage would help. If it's electronic, then you're dealing with stuff that you need specific information to do properly.
If you change anything, MAKE SURE YOU CAN PUT IT BACK WHERE IT WAS! I once owned a 7000EXL and am going to 'assume' it's about the same. There a solenoid that pulls the speed down when there's no load to save gas and it releases when there is a load letting the govenor spring take over and control the RPM's and therefore cycles. Look and see if yours has such a solenoid and if it's energized or possibly sticking when there's a load put on it and it should be released. It's also possible that just the govenor need adjusted.
Since your quoting frequency I suspect you have a way of measuring it. As I recall the govenor is adjusted by loosening two knurled disks that are on a threaded shaft that has the govenor spring attatched. Put more tension on the spring to raise the speed.
It's also possible the throttle shaft on the carburator is gummed up from sitting full of old fuel that gummed it up. So make sure it's free to move. Good luck Joe. Some frequency meters cant negate the correct frequency due to 'dirty' power from the gen head so it may not be reading correctly.
A Kill-A-Watt meter will be your best tool to fix this. If all you are getting is 43 hz under load I'm surprised the engine hasn't stalled under load. Its got to be your meter. There is no electronic stepper motor for any of the EXL series gens that I'm aware of, its a mechanical governor.
A magnetic solenoid energizes when the transformer coil in the panel senses less than 1 ampere on both hot legs. This pulls the governor arm back to slow the engine down to conserve fuel. It de-energizes when you put more than one ampere load on any of the legs. When the load is removed the solenoid energizes again when the idle control switch is set to on.
This should bring the frequency down to 45-48hz at an idle. You must set your unloaded speed at around 62-63 hz.
Here is a video of how the engine should sound on my 7000EXL. If its not doing this in the video, this is where you need to get it to. Thanks for all the input so far, I have used it to poke and prod this thing, and this is what I've found. The idler switch works fine, set on low it idles low until a load is put on it then it idles up. Set on high, it's just always idling high.
Can't tell you rpms as yet, need to pick up a tachometer. At low idle I get about 39hz or so, high idle 43hz or so. Same 43hz (approx) with or without load. If I juice the motor the hz does go up, found the right lever to push, and by the time I get to 60hz it's putting out about 160v or so and is revved pretty close to max. When I pulled the cover off to look at the scb, I noticed that the blue wire was disconnected and taped. I reconnected it but the only difference was that the freq readings I was getting seemed to be all over the place, never really stopping long enough to get a good read.
Don't know if it matters but it looks like there was a third wire on the scb, blue, going to fuse, green going to ground on the back of an outlet. And a white/green one inbetween them cut off at the base. It's still dark here I this part of NJ, and I'm at a loss as to what to do with thing. I'm just about ready to hit it with a hammer. So far all I can do is run lights with it. Any further help is greatly appreciated.