Generators

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  #1  
Old 10-27-12, 04:04 PM
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Generators

My brand new Mitsobishi generator(MGE 6700) won't run. Lat ran about 10 months ago...under load. Drained and replaced fuel....Oil level OK. Cleaned spark plug. Starts using ether then dies.
 
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Old 10-27-12, 04:34 PM
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Welcome to the forums! Sounds as if there is a carburetor problem. Has it been cleaned lately? Did you do a fuel starvation shutdown last time you used it? If not, it could be boogered up with old gas and shellacking. Also check your fuel lines, especially if any are inside the fuel tank.
 
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Old 10-27-12, 04:39 PM
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Actually, there was some old gas left in the tank. I have replaced the old gas and drained it out all the way up to the carburetor bowl. I sprayed cleaner in through the choke. What else can be done?
 
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Old 10-27-12, 04:53 PM
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PB Blaster makes a product called Lawn Mower Tune up. I have a can, but have not used it, yet, as everything is running OK. It is in a spray can, and would be sprayed similar to ether to clean out the carb and lines. Worth a shot.
 
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Old 10-27-12, 04:57 PM
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Thanks for the advice. Do you spray it in and leave it or do you keep trying to pull start and draw it in?
 
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Old 10-27-12, 05:04 PM
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The parts that need cleaning are not accessible through the choke area. To clean it where it needs it, you need to remove the bowl and spray carb cleaner through the jets and up through the pickup tube in the carb bowl area.
 
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Old 10-27-12, 05:05 PM
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From the label, spray it slowly while cranking and/or running the engine. It is volatile, so it may ignite like ether will, and may provide engine rotation to help clean it up. Let us know how (if) it works, as I would be interested to know.
 
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Old 10-28-12, 05:21 AM
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Welcome to the wonderful world of ethanol in your gas. I've become quite the expert at popping open the carb and giving it a quick cleaning.

Remove the bowl, and clean out the jets. Use a pin to make sure you get the smallest jet cleared. Check the float an see that it moves freely and is not gummy. Do not just hall off and hit everything with Carb Cleaner. Some of the orings will react with the carb cleaner and you are looking at a rebuild instead of a cleaning (not that I found out the hard way or anything).

In the future, completely evacuate the gas at the end of the season.
 
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Old 10-28-12, 12:34 PM
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Now that you mention ethanol......anyone use a Poulan chain saw (new one)?? I have one with an external threaded cap. One that takes a screwdriver and pair of channel locks to remove and replace . Finally went to see about buying a new cap. $9 later and a little good information, I got home with a good fitting cap. Guy at the repair place said it was the ethanol gas causing problems with the threads. He had a jar of gas/oil mix behind the counter. In the bottom of the jar was about 1/8" of white crap....ethanol residue that had settled out.
I took my old cap, and Dremeled the threads with a stone and it fits good, too. Will use it until I expend all the mix I have, then use ethanol free gas and the new cap.
 
  #10  
Old 10-28-12, 01:49 PM
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MItsubishi Generator

I took the carburater apart and cleaned everything that I could reach (not an expert). Well, it started up! I ran it for about 30 minutes. It's running a little lean right now so I have to set the choke to 1/3 open for it to run smoothly. Another issue, I guess. Thanks to everyone for all of the advice.
 
  #11  
Old 10-28-12, 04:45 PM
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Pay attention to the smallest jet on the bowl screw. Its located almost in the treads of the screw. I had to get a hat pin and a jewelers loop in order to find it and clean it out. Will run smoother once you get all the gunk out. At least you got the thing running should you need it with the approaching storm.
 
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Old 10-28-12, 06:26 PM
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I had the same problem generator would not start then finally got it running but had to run with it choked. I loaded about a lot more carb cleaner in the gas than recommended (I used a bottle good for 20 gal in 5 gallons) and ran the generator. Before I had run all of the carb cleaner through, I no longer had to choke it.
When shutting down don't just drain the gas out of the tank - drain the float bowl also.
 
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Old 10-29-12, 08:00 AM
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I did that also and let it run but it may take more time. My concern is that if there is indeed less gas flow through the carburetor that it will likely result in less power generated under load. I will probably check out the carburetor again today.
 
  #14  
Old 10-29-12, 04:11 PM
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Run some B3c mechanic in a bottle through it ,,it may clean it out. Run it for 10 min and let it sit for 4 hrs. Try it after sitting. Be Safe up there.
 
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Old 10-30-12, 07:08 AM
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I took the carburetor off again and cleaned it. I will also try the B3c if I can find it. I could not find the PB Blaster product either. On the bright side, I did find one of the throttle springs was cocked. I straightened it out and the generator started up and ran fine with the choke wide open. I still have not load tested it however, that will be the next step after the wind and rain die down....I'm in New York. From now on. when storing the generator, I will definitely drain the fuel tank and the float bowl. Lesson learned.

Again, thanks to everyone for their advice. I'm not very mechanically inclined and you guys made it easy!
 
  #16  
Old 10-30-12, 11:22 AM
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B3C can be purchased at Lowe's that last I knew. Stay safe and get dry.
 
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