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Old 07-11-2010, 10:25 AM   #15
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Interesting discussion. I've got two Yamaha generators, and I always do the same thing ... when I'm shutting down for more than a refuel or a few hours, I shut off the fuel shutoff petcock at the tank and let the engine run until it shuts itself down because it runs out of gas (I'm supposing that this drains the fuel line and the float bowl, etc.) Then I open to float bowl drain (they've both got small screws for this - just in case I could get a few more drops out, but seldom get aything. Then crank the engine a few revolutions to suck out anything remaining in the jets, and I think I'm good to go. At least have never had a problem.

And like Roger, I use Sta-Bil in the big cans when they are filled ... might not do any good, but doesn't seem to do any harm!
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Old 07-11-2010, 11:17 AM   #16
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With the newer fuel requirements with cleaners things are better but every 3 months adding a little tech-ron fuel cleaner will keep everything sparkley clean. I used it in a gas motorhome for years and probably didn't fire the onboard generator up once every 3 months .
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Old 07-11-2010, 01:44 PM   #17
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With Stabilizer added gas will keep up to several years depending on temperature. Without it, several months.

Drain the gas and use it in your lawn mower or put it in your car tank. If you add stabilizer fill the tank and run the engine for a few minutes. This way you will be sure the gas in the carb has stabilizer in it. The reason for filling the tank is that the less air in the tank the less condensation and corrosion.

When you restart, a shot of methanol will pick up any water. Methanol is the same thing as dry gas sold at gas stations, but cheaper.
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Old 02-06-2012, 02:55 PM   #18
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Is it necessary to drain the carb if you shut off the gas and run the generator dry? I have a Honda EU3000is and want to make sure I don't gum up the carb.

Thanks,
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Old 02-06-2012, 03:56 PM   #19
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Is it necessary to drain the carb if you shut off the gas and run the generator dry? I have a Honda EU3000is and want to make sure I don't gum up the carb.

Thanks,
I would being that it so easy and quik.
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Old 02-06-2012, 03:57 PM   #20
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Drain it!

Hi there,
30 days is about as long as gas will last (in California) without a stabilizer. California gasoline is worse than gasoline everywhere else! It's formulated to comply with Emisson regulations, so it burns a little cleaner but it does not last long at all. A stabilizer with help keep if good for about 4-6 months.
I worked in a Honda motorcycle/generator dealership service department for a few years and carb cleans were the most commom repair.
Even if you have bad fuel it may fire up, but expect it to be tempermental. it may run fine for a while but eventually, the bits of debris will clog the passage ways and cause dying or rough running. Sometimes, the debris can settle and it may run again, but it won't be great until the debris is removed.
Adding stablizer can be easy to forget. Make a point to be diligent about it and you will save yourself a headache. A month goes by fast! Don't forget the stabilizer!

Cheers!
Cara
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Old 02-06-2012, 04:22 PM   #21
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I always use sta-bil during storage. I do leave the treated gas in tank.

Ours has dual use LPG conversion, I shut down gas supply, (top clamp above yellow LPG line), run 'til it stumbles, shut down and drain carb. SFSG.

Bob
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Old 02-06-2012, 04:58 PM   #22
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So, do they have propane carbs for Honda or Yamaha gens?

Propane lasts much longer ...
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Old 02-06-2012, 06:11 PM   #23
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DO NOT PUT ETHANOL in your generator. It is sits more than a few weeks that stuff will cause corrosion. If you use pure gas and something like Stabil you can probably go 6 months. Stabil does not work with Ethanol. If you can run it periodically that would be the best. Maybe once a month. Shutting off the gas and running it till it dies will help a lot. If you leave the gas on it tend to evaporate from the carb and then more comes in and it evaporates till you have a lot of gunk in the float bowl. This gunk won't ignite even if it makes it through the jets. It will fowl your plug.

Perry
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Old 02-06-2012, 07:09 PM   #24
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Quote:
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So, do they have propane carbs for Honda or Yamaha gens?

Propane lasts much longer ...
GoD,

Yes....same carb, modified venturi to accept the LPG supply line.

Yamaha too...

I was able to use the Honda during a power outage this Winter without having to fill the gas tank, nice feature.

Bob
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Old 02-06-2012, 07:50 PM   #25
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GoD,

I was able to use the Honda during a power outage this Winter without having to fill the gas tank, nice feature.

Bob
Well, that's the way to go: forget the gas and all the related issues and go with propane!

For this reason I went with a propane outfit (Onan Microlight). Mounted it under the queen in the back, starts from a switch inside, and runs off the propane tanks of the trailer.

Don't have worry about it walking off and don't have to worry about fouled carbs.

Propane - its good for what ail's them!
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Old 02-07-2012, 08:09 AM   #26
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Propane is a great idea. Many home backup generators use propane because of the ability to sit for long periods of time and start right up.

Perry
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Old 02-07-2012, 10:16 AM   #27
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I'm applying information gleaned from the wildland firefighting community regarding portable pumps.

When I shut down my generator, I use this sequence: While the engine is running, shut off the fuel petcock. As the engine starts to stumble (from lack of fuel), push the choke lever to full choke. It will smooth out. When it starts to stumble once again, shake the genset a little bit. (This will get the last drops of gas that may be 'hiding in the corners' somewhere.) I find this easier than taking carb bowls or drains loose.

I keep stabilizer in the fuel at all times. Generator starts right up, first pull nearly every time (unless it's really cold outside, then it's the 2nd pull.)

I also run the generator every 30 days, under some load.
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