Honda 3000 Watt  Portable Generator Logo

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Posted on Mar 11, 2009
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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

  • 2 more comments 
  • 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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  • Expert 52 Answers
  • Posted on Mar 11, 2009
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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

  • Anonymous Dec 01, 2012

    Thanks Dave sound like the problem to me!!

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Honda es6500 won't start has fire,compression , gas, not voltage at carb, oil light on then goes out when cranking

If you run 12volts to the carb, will it run? I assume since it has no power at carb as you stated, that it has a fuel shut off at carb and will need voltage to activate magnet.
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Gas in oil

First of all check to see you have a good spark, If it is running fine under load ignition should not be an issue. If un burnt fuel or over fueling causes the oil / gas to wash down the cylinder walls. I would also perform a leakdown test not a compression test, remove the dipstick and listen for air coming out the crankcase, that will give you an idea if you ahve a ring problem. Also remove the air filter and see if you have any blow back from the carb blowing out where the choke butterfly is. If it has less than 150 hours on it, the rings may also not be seated in, try the above then run it hard on load and check it again
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Was running fine till ran out of gas ........fill tank up ...try to restart it .......wont start replaced plug ........still no go .

Recurring issues with honda engine no start. Engine was thought to be out of gas however engine was actually shut down by oil alert. Check/change oil to reset, or unplug wire from oil alert and check engine. Vacuum in fuel system due to faulty fuel cap. Loosen cap to allow air in tank. Water in fuel. Water will condense out of the fuel in fuel container and will be introduced into tank. Water is heavier than fuel and will enter carb bowl. Check engine fuel tank with flashlight for signs of water, remove fuel bowl (shut off fuel) and clean. Spark plug is rarely issue, however could be wet from too much choke. Good luck
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I have an em3500 honda generator which starts stalling out after 1/2 hour to an hour like it is running out of gas and then shuts off. I can restart it and it will run for 1/2 hour to hour and do the same...

Recheck for spark when it stalls. If you have lost spark I would say a heat damaged coil.

You should also drain and inspect the carb bowl. You may have low fuel flow which limits full throttle operation to 30 minutes or less. When it dies you are just refilling the bowl for the next run.

Good luck and be careful!
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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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Honda 5.5 generator gas is filling oil compartment when not in us

turn the fuel off when not in use,it is going through the carb.to the oil.
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