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Old 09-10-2011, 10:12 AM   post #1 of 5
awdriven
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Default unhappy, gummed up honda eu3000is generator

I purchased a used EU3000is. It had been sitting for about 3 years and had gasoline in the tank. It was claimed that the unit was only used for one storm with limited hours. It does look very clean throughout the inside of the case. It wouldn't stay running, which didn't surprise me. I drained the tank, rinsed with clean gas and drained that too. I added some seafoam to the fresh gas and filled the tank. I opened the carb drain valve to confirm that there was fuel reaching the bowl. I had what looked like enough flow. I pulled the air cleaner and found it to be in good shape. I then pulled the carb and cleaned it with some carb spray and ran a fine copper wire through the jet. The gas that had come out looked amber colored and old, but the bowl and carb both looked pretty clean inside. It still wasn't happy. I pulled the spark plug and it was nasty and gooey. I cleaned it off. Now it would stumble for a while (10 seconds?) if I applied varying amounts of choke when trying to start it. I pulled the spark arrester to confirm that it hadn't gotten plugged up - it was clean so I cleaned it a bit more in some solvent and then reinstalled. When I pulled the plug, I can definitely see the cumbustion chamber looks gunky. This is probably what's keeping it from running well. What's the best way to clean it since it's pretty much in a non-running state? Anything else I should inspect?

Getting to parts on the engine is a challenge too. Any pointers on making access remove the head? Is there a way to clean without pulling it? If I have any stuck valves, what would the symptoms be?
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Old 09-10-2011, 10:19 AM   post #2 of 5
k91
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Default Re: unhappy, gummed up honda eu3000is generator

You can't clean the carb well enough by just dropping the bowl and spraying into it. It needs to come off and be soaked. Your best bet might be to check with an Honda dealer and see how much a new carb costs. Sometimes they are surprisingly cheap for the Hondas.
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Old 09-10-2011, 10:42 AM   post #3 of 5
rscurtis
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Default Re: unhappy, gummed up honda eu3000is generator

I wouldn't worry about removing the head. Once you get the engine running properly and put it under a load, any deposits will burn out of the engine.
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Old 09-10-2011, 11:14 AM   post #4 of 5
RED-85-Z51
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Default Re: unhappy, gummed up honda eu3000is generator

Pull the carb, flip it over...the jet is the 3/8" tall screw in peice...the tube that is under IT, is the emulsion tube, has about 10 fine little holes in it...the tube can be pushed down fro mthe carburetor throat with a pick or something, then tapped out the bottom.

Also, the pilot jet, which is under the plastic idle screw, needs to be popped out and cleaned...blow the hole it is in out too. It'll run good...
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Old 09-10-2011, 10:32 PM   post #5 of 5
awdriven
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Default Re: unhappy, gummed up honda eu3000is generator

I did a more thorough cleaning, put in a new plug and now its darn good! Thanks for talking me out of messing with the head. I need to run it with some more seafoam gas for a while to even out some more.
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