The Honda EU2000i portable generator is an amazing piece of equipment.
2000 watts , inverter based, extremely quiet and sips fuel……but it has one glaring issue in this real world of ethanol gas.
When you shut it down, the carburetor holds a few tablespoons full of fuel. As the gas evaporates it leaves a varnish like residue that causes hard starting (or NO starting) the next time you go to use the generator.
The internet is chock full of folks adding fuel cut off devices and other means to rectify this situation. But it is really quite simple to do it yourself.
The EU2000i has an “ENGINE SWITCH” that is used to shut down the generator at the end of its use.
This engine switch does two things….it shuts off the fuel to the carburetor AND it shorts out the spark-plug to stop the engine. All well and good, but this leaves a few tablespoons of fuel in the carburetor. Just enough to really mess up the works!
Honda did install a drain for the “float bowl” that is accessed from a small screw and a little plastic pipe drains the float bowl. This is a nice feature, but not enough with the crappy fuel the government has mandated.
But this STILL leaves a bit of gas in the carburetor.
So, what to do….?
Disconnect the spark-plug shorting / ground circuit and install a separate switch for this function and allow the Engine Switch to only shut off the fuel supply.
First…Open the side access door and find a white, two wire connector with a green and black wire. You can easily trace it back to the Engine Switch to be sure you are dealing with the correct wire.
Disconnect this white connector.
Find the wire that is connected to the engine…Not the wire going to the switch and either cut the connector off and add two new pieces of wire. Or do what I did and leave the connector intact and solder two new wires into the existing wire just after the connector.
You could also use what is called “Scotch Lock Connectors” to splice into these wires.Available at Radio Shack or any auto-parts store.
But I like solder on any wiring that is exposed to excessive vibration.
These two new wires will now go to a simple “Single Pole-Single Throw” (SPST) switch that you can mount anywhere you please.
I cut a hole for a thumb type toggle switch that I found at Radio Shack.
But a simple toggle switch that you drill a hole for is easier to install.
Now…..Button everything up…
Be sure your new “STOP” switch is in the “RUN” position (breaking the circuit), turn the ENGINE SWITCH to “ON”, set the choke and start the generator.
Test your new “STOP” switch to see if it is functioning properly. When you flip this switch the engine should die immediately. Leave the ENGINE SWITCH in the ON position.
Return the “STOP” switch to the RUN position.
Start the generator again. This time turn the “ENGINE SWITCH” to off. The generator will run for quite some time with the fuel shut off. Just shows how little fuel this generator uses. After a few minutes the engine will sputter and die.
Now here is the important part…..Set the choke like you would for a cold start and leaving the “Engine Switch ” in the OFF position and your new “STOP” switch in the RUN position, start the generator again. It will run rough and only run for a few seconds, using up the last drops of fuel in the carburetor.
THAT’S IT!…The carburetor is now empty…….(Well, if you turn the float drain screw you might get a few more drops of fuel out of the float bowl…..recommended) Once you have drained the float bowl, be sure to return this screw to its closed position.
This little modification make a great generator even GREATER!
One last caution…..Folks have told me you should not do a “Run Dry” with any electrical devices hooked up to the generator. They warn that damage could be done to the sensitive electrical devices as the generator goes through that final run down phase. This procedure only needs to be performed when the generator is going into long term storage….More than a month in my book is long term storage.
Also, if you shut the generator down overnight or for some other short period of time, use BOTH the Engine Switch and the new STOP switch. STOP switch first and then shut off the fuel with the ENGINE SWITCH.