Question about Honda 3000 Watt Portable Generator

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I have a honda 3000IS generator it runs good for many hours then it starts idling up and down and quits when we restart it sometimes it runs good again or it may idle up and down and quit again any ideas would be helpful

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Hi and welcome to Fixya I am Kelly. This symptom is typical of fuel starvation. It can be caused by

1. A dirty fuel filter (if installed)
2. Debris in the bottom of the fuel tank
3. Fuel shut off selector not all the way on or debris in pet-c^ock bowl. This is located on the bottom of the fuel tank.
4. Float needle assy not allowing proper fuel flow in the float bowl
5. The fuel supply line or the plastic "Y" just before the carb is cracked and air is being introduced into the system as the fuel hose swells from heat.

I really think you have a fuel supply issue. A break down can be found here of your carb:,%20JPN,%20VIN%23%20EZGF-1000001%20TO%20EZGF-1079999/CARBURETOR/parts.html

Fuel tank cap removed

You should be able to remove the angled drain screw (Item 6 above link) in the bottom of the float bowl and have fuel flow freely out of the hole. (I use spray paint can cap / lid to catch the fuel. If you can not fill the spray paint cap to the inner circle of the cap in one continuous attempt there is a problem with fuel supply ( 1 - 5 above )

If you can avoid it DO NOT remove the carb. Getting all the linkages correct during reinstallation is tedious even for seasoned techs on this generator. You can safely remove the float bowl and check for debris / give the jets a blast of carb cleaner. If you do use carb cleaner also direct a shot into the fuel hose connection (hose removed) on the side of the carb with the bowl off. The jet is in the very bottom of the center post.

PLEASE do a leak test before starting the engine with the fuel selector on. (Safety issue)

Make sure you replace the fuel tank cap before starting the generator.

Thanks for choosing FixYa.


Posted on Aug 05, 2010

  • Kelly
    Kelly Aug 10, 2010

    If your generator has been in service there is a good chance that there is water in the float bowl. On the side of the sloat bowl there is a plug that is at roughly a 45 deg angle. It will be item 6 of this link:

    (Use the fuel tank supply fuel shut off to control fuel flow on / off as required)

    Using a catch basin such as a spray paint can lid, remove the plug (Item 6 above link) and drain out the moisture. You will know for sure if you have water in the float bowl as you will see it in the fuel. If water has been present for sometime it will have a rust color to it. If you see the rust color the float bowl will have to be removed by removing the bottom nut (Item 7 of above link) and the rust in the float bowl will have to be physically removed / cleaned out. There is an O'ring on the bottom of the carb body that you should also wipe clean so that when you reinstall the float bowl that is seal properly.

    Additionally most of these smaller Honda generators have the float needle physically attached to the float itself. Pulling the hinge pin out will remove the float and the float needle. Depending on the float assy used (2 types) the float needle may not be able to be separated from the float assy. The float needle rubber tip should be soft to the touch and the rubber surface should be clean. Using carb cleaner on the float needle and in the needle seating area is recommended. You do NOT have to remove the carb. Just spray it into the hole to remove any debris. When you reinstall the float guide the float needle into the hole, let the opposite side of the float drop down at an angle so you can reinstall the hinge pin. If you use cab cleaner make sure to spray into the very bottom of the center post to clean out the fuel orifice hole. Then reinstall the float bowl.

    Make sure the fuel is on, wait 30 seconds for the fuel bowl to re-fill and then start the unit. Check for residual fuel leaks before returning the generator to normal service.

    Thanks for choosing FixYa.




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