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  • EU2000 Honda generator troubleshooting

    I am, by and large, very pleased with my quiet and portable generator. I use it to charge my two, twelve volt batteries in the winter when the sun is insufficient, and for power tools year around. Some time ago it began to surge (about one cycle a second). I put some HEET in the tank and that helped for awhile. Then the surging resumed. So, I played with the choke and found it runs fine at half-choke. If I go back to no-choke, it surges again.
    Any thoughts from you small engine gurus out there?
    Thanks.

    JB

  • #2

    Re: EU2000 Honda generator troubleshooting

    Re: EU2000 Honda generator troubleshooting

    Sticking governor?

    Most air cooled engines use a vane in the cooling air stream, and adjust that for the right RPM.

    The EU in EcoThrottle, should monitor the load, and as the load increases, speed up the throttle, to supply enough power.

    Is the air filter installed properly ? While checking that, de-gunk the carb with a shot of spray stuff, and add more cleaner to the fuel tank (in the proper ratios)

    Has the choke shutter come loose, and shifted position ?

    There are a whole lot of things to look at.
    http://tinyurl.com/LMR-Solar
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    Grundfos 10 SO5-9 with 3 wire Franklin motor (1/2hp 240V 1ph # 214505 ) on a timer for 3 hr noontime run - Runs off PV
    Powerfab poletop PV mount | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe battery | 15, Evergreen 205w "12V" PV | Midnight ePanel || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT

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    • #3

      Re: EU2000 Honda generator troubleshooting

      Re: EU2000 Honda generator troubleshooting

      Give me some more specifics about how you have been using this genny.

      The fact that it runs well half choked, tells me that the carb has a either a plugged main jet, or gum in the fuel. If the engine has sat for a long time without fresh fuel, I would suggest a complete carb clean.

      You could try draining the tank, AND the carb bowl, and refill with fresh fuel and see if that cures it. I think the carb has a drain screw and built in drain hose making draining it simple.

      Most people don't realize that gasoline goes stale very quickly. If a small engine sits for more than a month or two, the fuel should be drain, and the carb either run dry or a drained or gas stabilizer should be added (a poor second choice IMHO)

      Tony
      Please note, being a moderator does not add any weight to my opinions 300 watts Siemens/BP panels,plus a Sun 90,, making ~400. ~30 amps into Rogue MPT-3024, 450 ah of Trojan T-105, Morningstar ts300 inverter, a Tri-Metric meter.a collection of antique generators, plus 2 Honda eu-1000i's (also a BS2512 IX controller) and assorted other stuff!

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      • #4

        Re: EU2000 Honda generator troubleshooting

        Re: EU2000 Honda generator troubleshooting

        This is a widely experienced problem with the EU1000i and EU2000i generators, which have very tiny fuel jets. It's caused by gas evaporation in the carburetor fuel bowl from leaving the generator stored with fuel in it between uses. The main jet and holes in the emulsion tube get gummed up. I did it with both of mine. Stabil in the fuel didn't prevent it and carb cleaner additive in the fuel did not fix the problem.

        To clean them, remove the air cleaner cover, the air filter, then the air cleaner itself.

        I can't remember if the air cleaner screws held the carburetor on the intake manifold or if their were a couple of more screws that did that, but the carburertor has to be loosened up to tilt the bottom of it out so you can remove the phillips screw on the bottom that holds the carb bowl on. Be VERY careful when removing the bowl to not bend the floats and change their setting. Unscrew the main jet and catch the emulsion tube when it drops out. If it doesn't, you can push it down in the carb throat and it will fall out.

        Soak both in carb cleaner and use a very thin wire (like a bristle from a brass wire brush) to poke through the holes back and forth. You may find corrosion in the fuel bowl. If so, clean out any that's loose. Reassemble everything.

        It's helpful to use the on-line Hayward Parts Catalog illustrated parts break down.

        Under the Catalog menu, choose American Honda. In the resulting menu, choose Generator, not Generator-RV. Scroll down to the EU2000I selection who's range matches your serial number. Choose air cleaner and carburetor.

        Hope this helps,
        --
        Moe
        Last edited by Moe; January 20th, 2009, 3:42.

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        • #5

          Re: EU2000 Honda generator troubleshooting

          Re: EU2000 Honda generator troubleshooting

          I have two of these EU 2000 generators and one had this problem.

          As Moe pointed out it turned out to be a clogged carburator. Tech told me that the ethanol in the fuel sometimes degrades in the lines causing the problem. Had mine cleaned and runs well ever since.

          Good to know how to do it yourself. They charged me $75!
          Last edited by Mangas; January 20th, 2009, 4:55.
          Off Grid 4x5500SW Plus Xantrex SinePlus Inverters/48V DC System/44x185W Sharp Panels/64xTrojan L16-REB 6v/Two Outback FlexMax 80s'/Water Miser Caps/Inverter Managed Air Extractor System/Output to two 100Amp AC Service Panels/Two Communicating 3 Ton Central Air Conditioning Units & Air handlers/Propane Generator CumminsOnan RS20000/RASTRA House Construction

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          • #6

            Re: EU2000 Honda generator troubleshooting

            Re: EU2000 Honda generator troubleshooting

            Let me reenforce my point about stale fuel.

            I have spent more time "repairing" engines from the damage of old fuel. It doesn't take very long,, a matter of weeks, or months at most. I ALWAYS store my small engines dry if possible, or at the very least, run the carbs dry before storing.

            One other tax on old fuel I have seen, is in horizontal piston engines, stale fuel can collect in the cylinder at the bottom when the engine is shut down. After the ignition is shut off and the engine winds down, it is continuing to pull fuel in the cylinder until it stops turning. This fuel is not burned, and then evaporates leaving a gummy varnish. This varnish/gum can clog the rings such that the engine is never right until it is torn down. ( This is very common in Onan engines)

            As Moe has pointed out Stabil doesn't live up to it's reputation. The problems are exacerbated by the tiny holes in the jets of the honda series. (The smaller the engine, the worse the problems can be, and the faster they occur).

            Tony
            Please note, being a moderator does not add any weight to my opinions 300 watts Siemens/BP panels,plus a Sun 90,, making ~400. ~30 amps into Rogue MPT-3024, 450 ah of Trojan T-105, Morningstar ts300 inverter, a Tri-Metric meter.a collection of antique generators, plus 2 Honda eu-1000i's (also a BS2512 IX controller) and assorted other stuff!

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            • #7

              Re: EU2000 Honda generator troubleshooting

              Re: EU2000 Honda generator troubleshooting

              When you say you store them "dry" what does that mean? I had assumed that is what I was doing when I would shut off the fuel to the motor and let it run out of fuel. I have been doing that to infrequently used motors, or starting them once a month. I don't let gas sit for more then six months even when treated with stabil (not sure that really helps, but it makes me feel better) I either run the tank out of gas or drain the tank and add new gas.
              XW6048, 4 KC 120's, 4 KC 130's and 4 Evergreen 200's totaling 1800w of PV, MX-60 charge controller, Trimetric meter and eight AGM 8A8D's or 490 amps at 48v. 4 tons of geothermal and 3 tons of air source.

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              • #8

                Re: EU2000 Honda generator troubleshooting

                Re: EU2000 Honda generator troubleshooting

                that would be coined running it dry, but they do sputter until they stop and leave a trace of gas in there. i wouldn't think that trace to be detrimental, but in time would build up if done enough times.
                i had to get rid of some old gasoline some time back and i didn't want to put it into my car either and i asked my boss at the time who is a chemist too and he told me to just put it into a pan and let it evaporate. the remainder you can just toss into the garbage if contained, although i wasn't supposed to. there was much more left than i thought there would be and it was a thick jelly. i'd recommend a chemical cleaner such as mek to clean it out, but if it contacts any plastic parts, it could ruin them. in the future after you've manually cleaned it, when it starts knocking from shutting down the gasoline supply and before it stalls that you can spray a bit of ether into it to make sure all of the gasoline has burned off.
                NIEL

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                • #9

                  Re: EU2000 Honda generator troubleshooting

                  Re: EU2000 Honda generator troubleshooting

                  Originally posted by icarus View Post
                  I ALWAYS store my small engines dry if possible, or at the very least, run the carbs dry before storing.
                  Right, so the second part is what I do, run the carbs dry, or running it dry but what else is there to storing them dry? I am just wondering what else I should be doing? I haven't had an issue yet, but if there is something else I could do to avoid having an issue at the worst possible time, I would do that as well
                  XW6048, 4 KC 120's, 4 KC 130's and 4 Evergreen 200's totaling 1800w of PV, MX-60 charge controller, Trimetric meter and eight AGM 8A8D's or 490 amps at 48v. 4 tons of geothermal and 3 tons of air source.

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                  • #10

                    Re: EU2000 Honda generator troubleshooting

                    Re: EU2000 Honda generator troubleshooting

                    I drain the gas tank (even use a paper towel to soak the bottom of the tank), and run dry. For a one cylinder engine, you can give a soft pull on the starting rope to get the valves closed (piston on a compression stroke).

                    Pulling the spark plug and squirting some oil in and replacing the spark plug... But that may be a bit excessive (and lots of smoke the next time you start the engine).

                    I also use Stabil--in five gallon metal gas cans. Dump the fuel (into my car and truck) once a year and refill (for my earthquake preparedness)... Have not had any problem yet.

                    I would guess with a small amount of fuel, the Stabil might not work as well (1/2 quart left a vented the fuel tank).

                    Be careful with spraying anything into the carb/fuel lines... There are so many synthetic materials (plastics, rubber, etc.)--that I would worry that might dissolve something or even etch the carb body (like methyl alcohol).

                    -Bill
                    20x BP 4175B panels (replacement) + Xantrex GT 3.3 inverter for 3kW Grid Tied system + Honda eu2000i Inverter/Generator for emergency backup.

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                    • #11

                      Re: EU2000 Honda generator troubleshooting

                      Re: EU2000 Honda generator troubleshooting

                      i would think a quick shot of ether into it should be ok as that is what is commonly used to start many cars with carburetors when they are being stubborn. that stuff would push through and evaporate the remaining gas and burn it in the final throws of the engine. wiki link to dimethyl ether used in starting fluid. http://en.wikipedia.org/wiki/Dimethyl_ether wiki for starting fluid. http://en.wikipedia.org/wiki/Starting_fluid an ether of tetrahydrofuran i would not recommend as i know this eats plastics very well and will destroy plastic better than mek. these chemicals are more flammible than gasoline too. mek is a carcinogen and i worked with that for nearly a decade. no cancer yet.
                      i do agree on emptying the tank of gas as that is what i have done with my generac too. i do not store gasoline as it does not store and it is a hazard not to mention stinky. if i have need of the generator then i'll go to the gas station to get it. if they can't sell me gas then i'll take it from my car.
                      NIEL

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                      • #12

                        Re: EU2000 Honda generator troubleshooting

                        Re: EU2000 Honda generator troubleshooting

                        The carburetor bowl on the EU2000i has a drain screw (and hose) the owner's manual recommends you use for storage (as well as removing gas from the tank).

                        Running dry doesn't work completely on all engines. On the Keihen carbs Harley uses (used?) the main jet is lower than the slow speed jet. When you run it dry, the main jet is still submerged in gas. Worse yet, there's a passage in the bottom of the bowl with a check valve ball that feeds the accelerator pump. Some bowls (i.e. those on Sportsters) have a drain screw in this passage, but the same carbs on Big Twin models don't.

                        Running dry seems to work on the 4HP Johnson two-stroke on our sailboat. I pull the hose off the motor at the dock when we come in. One of the reasons I bought a two-stroke snowblower this year was to use the outboard gas we didn't use.

                        I believe today's gasoline doesn't last as long as it used to. And I believe the corrosion I found in the Honda carb bowls was due to ethanol capturing water. We keep 10 gallons for the generators, especially over the winter, but I have to call the brother-in-law annually to come get it free since our truck is a diesel. That's why if I was using a Honda for backup power at a homestead, I'd convert it to propane.

                        Stay warm,
                        --
                        Moe

                        Comment


                        • #13

                          Re: EU2000 Honda generator troubleshooting

                          Re: EU2000 Honda generator troubleshooting

                          I've got several small engines of several different makes and have had good luck using a fuel stabilizer.

                          On a small engine forum I frequent they like a product called SeaFoam. I have been using Stabil.

                          The fuel stabilizer itself has a one year shelf life and only works when added to fresh gasoline.

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                          • #14

                            Re: EU2000 Honda generator troubleshooting

                            Re: EU2000 Honda generator troubleshooting

                            Storage issues depend greatly on your own experience and needs. If you lay up your stuff at the cottage for 11 months it is different than parking the lawnmower for a month or so.

                            In addition to draining the tanks and the carbs, (or leaving the tanks full, with little air) pulling the plugs and giving them a dose of fogging oil, leaving them at the top of the compression stroke to relieve the tension on the valve springs. (Probably more important in larger engines,, I leave my Lister that way) Storing under tarps is a double edge sword. The can keep water out, but they can trap moisture in.

                            I always like to store engines with fresh oil. My feeling is that with fresh oil, the acids that have formed in the oil are drained so that they can't attack metal parts. Others disagree and suggest changing the oil after long term storage.

                            On the note of what to do with spoiled gas. First, avoid the temptation to try to save it,,! even at $5/gal it is not worth it. On the other hand, dumping it, or letting it evaporate is a bad idea as well. Most places have places to safely dump and re-refine old gas and oil. Pour it into used oil or bleach bottles, or even gas cans, and take it to your local car mechanic and if you have to pay a few bucks to dump it safely so be it. Evaporating is hard on the local air!

                            Tony
                            Please note, being a moderator does not add any weight to my opinions 300 watts Siemens/BP panels,plus a Sun 90,, making ~400. ~30 amps into Rogue MPT-3024, 450 ah of Trojan T-105, Morningstar ts300 inverter, a Tri-Metric meter.a collection of antique generators, plus 2 Honda eu-1000i's (also a BS2512 IX controller) and assorted other stuff!

                            Comment


                            • #15

                              Re: EU2000 Honda generator troubleshooting

                              Re: EU2000 Honda generator troubleshooting

                              For gas storage we have 3 5 gallons tanks and I never let a tank sit more than 6 months (every spring and fall) before I dump it in the van and refill the 5 gallon jug usually it just gets used up in the snow blower or lawn mower. I do stabil the fresh 5 gallon jugs even though I never let them sit for longer than 6 months, again probably overkill, but...
                              XW6048, 4 KC 120's, 4 KC 130's and 4 Evergreen 200's totaling 1800w of PV, MX-60 charge controller, Trimetric meter and eight AGM 8A8D's or 490 amps at 48v. 4 tons of geothermal and 3 tons of air source.

                              Comment

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