Question about Honda 3000 Watt Portable Generator

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Gas in the oil on my honda generator

Gas in the oil on honda 3000 generator even after all the gas is ran out of the carb and the gas is shut off

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  • alverhorton Mar 11, 2009

    this unit is at around 10 years old it is mounted in a squad vehicle for an ambulance service we crank it every morning after we crank it we let it run until it runs the gas out of the carb and goes dead I dont knoe if this is helpful but the gas tank is mounted on top

  • nathanreynol Mar 17, 2009

    when not in use if there is gas in the tank it drains into the oil compartment until it is full or all the gas is gon, seems like the float needle is stuck open letting the gas through.

  • Robert marquette May 11, 2010

    how old is this unit? sounds like worn out rings. does it smoke?

  • Rod Fredrickson
    Rod Fredrickson Dec 09, 2013

    That's a common problem with Honda engines. you have to shut the gas off when killing the engine. I'm getting gas in the oil on my eu 3000 while the engine is running, and haven't yet found the cause.

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  • 52 Answers

Your needle/float is stuck, which will allow fuel to flow though the intake...past the piston..and into the crankcase. If has been awhile since you used it, most likely the gas has gummed up the insides of the carb. Otherwise, you may have had something get into the fuel bowl that is keeping the needle from closing. Best way to solve is to remove and clean the carb. Replace fuel filter if needed also.
Hope this helps

Posted on Mar 11, 2009

  • Darren Gladue Dec 01, 2012

    Thanks Dave sound like the problem to me!!

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It will start on full choke and run for about 5 seconds and shuts off. I changed oil because it was black. It did same thing a year ago and shop said the fuel line was blocked? I ran it for about 25...


first if its a honda,is it a gas/oil mix as the gas/oil mix plugs up quicker than a 4 cycle engine ?even 4 cycle engines that get bad gas i.e. water in the gas will plug up the carburator from rust, white rust(from water minerals) corrosion,dirt,etc.,when its running and just as it dies out,pull out the choke and see if it picks back up in r.p.m.'s,if it does,then you know its lacking fuel from starvation from plugged fuel lines/carb to keep running,then you need to re-build the carburator or you could first try a can of carb cleaner while its running down into the carburators intake,but this is a tell-tale sign of a bad/dirty carb,try this,with a small wrench,pull off the carburarors "sediment bowl" located just ubder the carbs body and carefully unscrew the brass nut and remove this bowl(careful to NOT lose the gasket) and see how moch water/dirt,etc., is in the bowl if theres water it will look like droplets in the gas in there,if you have this contamination you need to clean out both the gas tank and carburator and all fuel lines leading to and from these to the engine

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Aug 10, 2010 | Honda 3000 Watt Portable Generator

1 Answer

I have a 3000is not starting. Has gas spark oil.


Use fresh gas! Dont just pour some on top of the old...Change it out.

Drain the carb bowl (Honda carbs have a drain screw slightly off-center of the bowl bottom).

The Honda EU3000is uses a vaccuum-operated fuel pump and old gas will ruin it also.

Take the fuel supply line off the carb inlet, direct it in a container and spin the engine over. It should pump a stream that is FULL LINE DIAMETER.

If still no start, take it to an AUTHORIZED Honda Power Equipment Dealership.
Find one here.

Hope this helps.

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Mar 17, 2009 | Honda 3000 Watt Portable Generator

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