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Have b&s 23hp v-twin 2010, it's dumping raw gas

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  • Motorcycles Master
  • 8,404 Answers

Replace float and needle for starters ... that should fix. as a back up, you should shut off the fuel valve if possible, or does yours have a fuel pump?

Posted on Jul 26, 2013

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Rear Carb leaks fuel out of overflow

Hole in the float. It fills with gas, sinks and fails to stop the fuel flow

Posted on Apr 25, 2009

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SOURCE: need setting for carb. adjuster on bottom of carb

Turn the adjusting screw all the way in until it LIGHTLY seats. Now back it out one and one half turns. Do the same adjustment for the throttle screw on the right side of the carb. You are now back to the stock factory settings.

Could you take a moment and rate my answer? Thanks!

Posted on Sep 20, 2009

DoubleClutch
  • 376 Answers

SOURCE: Air box and crank case fuel flooding problem

Well there only one way the fuel can get into the crankcase and that's from the fuel tank. The petcock must be draining and the float needles are not stopping the fuel flow. Do you have a prime position on the petcock? If so do not run the bike in the position. Try topping the tank off with gas and letting it sit for a while and see is the gas has gone down and then check the crankcase and see if there's fuel in it again. i still say its got to be your petcock.

Posted on Sep 29, 2009

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ollie reece
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SOURCE: ttr125 no gas getting to the carb.

buddy have you tried adjusting the float well get back to me if not

Posted on Oct 25, 2009

wd4ity
  • 4565 Answers

SOURCE: 2001 Heritage softail, carburated. Gas in oil.

If you had gasoline in your oil, there's only two ways for it to get there. It either came through the carb or someone poured it in there.

I've been messing with Harley's since 1966, back before they created these cute little names for the engines like Panheads, Shovelheads, Evolution, Blockhead, Fathead. We only had two engines, Sportster 61 cu. in, and the 74 cu. in. in the big bikes.

Now, the way the fuel got into your gasoline was through the carb. If you've ever watched an old timer get off his bike, he'll reach under the tank and turn the fuel off. This was keep what happened to you from happening. It worked every time. The problem these days is in their infinite wisdom, Harley has adopted the misguided conception that the Japs started, the vacuum operated petcock. The absolute worst invention man has ever designed and put on a motor vehicle.

Now, in both the petcock and the float bowl of the carb you have a "needle and seat" all it takes is one very small bit of trash to cause the gasoline to seep past the needle. Keep in mind now that gasoline has a lower viscositiy than water. It will go where water won't go. It's thinner. A lot of gasoline can seep past a needle and seat in a 12 hour period. I've seen fuel tanks empty themselves in that time.

I've fixed many bikes that had the vacuum operated petcocks on them. They started putting them on the bike in 1996. I've seen people stranded beside the road with full tanks of fuel but not a drop getting to the carb. I've seen gasoline pouring out the small vacuum line (probably what happened to you) after the engine had been flooded out due to a ruptured diaphragm. And, I've even seen a couple of cases where the engine was sucking air through the petcock and would not idle or even run very well.

Now, when you change the oil on a harley engine, you don't get all the oil out of it like you do on car engine or a Japper engine. There will be a certain amount of oil left in the top of the heads and the camchest. Also, the gasoline fills up the crankcases that are supposed to be empty of oil. If you have a quart of gasoline that has run down past the rings into the crankcase, you now have one extra quart of fluid in your oil system. Whenever I suspect something like what happened to you, I always take the spark plugs out and spin the engine over a few times to get any excess fluid out of the crankcase. It will blow it out of the crankcase vents which in your case is in the heads. Those big bolts that hold the air filter backing plate on are hollow and are actually crankcase vents.

So, in short, my suggestion is to take that vacuum operated petcock off your bike, plug up the vacuum hose, and purchase a high quality manually operated petcock like a Pingle. They're expensive but if you get into the habit of turning it off whenever you get off your bike, this problem will NEVER happen to you again.

BTW:, you need to check your primary oil to see if it's been diluted as well. The gasoline will go past the sprocket shaft seal and contaminate that oil as well. You're pretty safe on the transmission lube though.

Good Luck
Steve (old biker)\\\\\

Posted on Jul 11, 2010

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