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Gas comes out of the carb overflow tune whancock shut down

Posted by Anonymous on

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6 Suggested Answers

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: 2003 WR250 F - eng. won't idle down and carb starts to overflow

Hi Jwelden,
Have you checked the float level in the float chamber?
I guess you may have to reset the float pin adjustment, its allowing more gas to pass through thn required and thus the overflow!
Not bad too, when you are working on the float assembly take the opportunity to blow out the fuel line from petcock to the carburator via the seat for the float pin,any foreign particals there would stop the float pin to seal up and thus overflow.
Fit in an inline fuel filter , this will help keep out the dirt or whatever.
Hope this helps.

Knight (Yamaha Seca XJ750A 1981)


Posted on Feb 13, 2009

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  • 3567 Answers

SOURCE: CRF230 - Throttle won't turn.

The overflow problem is a carb float being stuck open. Turn off the gas and drain the offending carb(s). Next, turn the gas back on and sharply tap the float bowl with the plastic handle of a screwdriver as the fuel bowl refills. The goal here is to vibrate the float to free it up. If doing this process a couple of times doesn’t free the float I would remove the offending carb(s) and clean with a spray carb cleaner. By the way, Check the float, it could be filled with gas instead of air. Clean the air filter then re-mount carb(s). Next, remove the water trap bowl at the bottom of the petcock, (gas valve). Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ). Install an in-line fuel filter.

The lack of movement in the carb slide is either a bad cable or the the carb is a CV model. The slide on a CV carb will not move unless the motor is running. Start the motor. Does it speed up normally when you twist the grip? If so, then there is nothing to worry about.

Posted on Apr 16, 2009

voodoomox
  • 1689 Answers

SOURCE: 87 yz125. gas pours straight through carb

change the needle and make sure its jetting right, check the floats if it is operational. '90 to '95 carbs are compatible, so if you are planning a replacement, you may use those

Posted on Jun 10, 2009

  • 75 Answers

SOURCE: gas overflow line coming from carb is pouring out on a 2001 kaw

the carb needs to be cleaned the float is stuck open and is over filling
cheap and easy fix
good luck

Posted on Jul 08, 2009

wayneman01
  • 301 Answers

SOURCE: Carb leakes gas out overflow

It doesn't take much to hang the float valve open. The smallest speck of dirt or debris will cause the float valve to not shut the flow of gasoline off. After sitting for that length of time, the carburetor needs to be completely disassembled and cleaned. Use an automotive carburetor cleaner (but do not put any plastic or rubber parts in the carb cleaning solution as they will be eaten up). While you've got the carb apart, inspect the float valve. Replace it if there's a groove worn into the tapered seat. Installing an in-line fuel filter may help, too.

Posted on Nov 16, 2009

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1 Answer

Why is gas dripping/runnng out bottom overflow line of carb?


Could be one of the carb floats is stuck or the rollover caused it to come off its mounting position. As fuel enters the carb, the float rises with the fuel level until it reaches a position that shuts off any more fuel entering the float chamber and prevents an overflow. Fuel level drops, float drops and fuel flows again. Basically like the cistern in a toilet.

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Happened to my Husky..Your mower is equipped with the EPA positive shutoff electrically operated valve on the bottom of the carb..it is designed to stop overflow of gas from the carb when the float sticks.. however when it fails the gas now flows back through the carb and into the cylinders and eventually filling up the crankcase and cylinders.. In stead of to the ground...You can replace it but eventually it will fail...the easiest and best fix is to put a easy to get to shut off valve between your tank and carb..When ever you shut your mower down for ANY reason turn off that valve before shutting it down..put mine on two years ago and hasn't failed me yet...Just need to remember never shut the mower down with out turning the gas flow off....NEVER....it may not fail but when you least expect it WALA oil in the gas...best is to shut the gas off and let it run for 20 seconds or so then shut the mower down..this assures no gas in the carb system cannot get into the oil...hope this helps pass it along to your friends as all newer motors are required to have them...good luck.

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1 Answer

I have a 1986 883 sportster. The carb is overflowing gas when it idles or sits . What could be the problem. Its been sitting a while.


Hi Anonymous, and the usual suspects are:
1. Damaged or restricted fuel tank venting system.
2. Loose float bowl screws.
3. Damaged float bowl o-ring.
4. Improper fuel level in float bowl.
5. Worn or dirty inlet valve or seat.
6. Damaged or leaky float assembly.
7. Particle contamination in inlet fitting cavity.
8. Ethanol sludge, dirt, rust in bottom of fuel tank
Good luck

Jan 24, 2013 | Harley Davidson XLH Sportster 883...

1 Answer

Gas leaking through overflow


Your carbs need cleaning and setting,, the needle and seats are what controls the flow of gas into the float bowls... the floats movement (up and down) regulate the movement (opening and closing) of the needle and seat

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1 Answer

Mbk mach running problem


How much gas comes out of the carb when you stop? Do you turn off the fuel shut off valve when it is not on? It sound like you float in the carb is not working properly or or float needle is no good anymore because from the carb leaking gas thru the over flow the gas isnt getting shut off by the float and pin int the float bowl. These are relitivly cheap parts to fix if that doesnt seem to fix the problem then shoot me an email. Good luck A.J. Weaver

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1 Answer

Gas coming out of overflow on my 2000 polaris 500 4x4


The float is sticking. Sometimes a gentile tap on the carb will fix the issue. If that fails try shutting the fuel off until it runs out of gas, then turn fuel back on. If this fails, removal and cleaning carb is required.

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do u mean gas as in petrol??if it is petrol...then its leaking from the carbs..as this id the overflow pipe!!..if thats the case..then it sounds like the carbs may need cleaning. as they may be some muck in there thats stoping the floats from shuting.(carnt shut so overflows!!) this could make the bike backfire as still petrol going to engine when carbs shut so backsfire..or the back fire could be from the new exhaust .if its not seal'ed right on the manifolds it sucks air in & can make them pop & backfire when you shut the throttle(like when u shut throttle when coming up to a stop)....hope this helps...Howard

Jan 05, 2010 | Suzuki LS 650 Savage Motorcycles

2 Answers

KDX200 carb float set up. Hi I have gas coming


If you have gas coming out of the overflow tube, you need to make sure the float valve is shutting the gas off properly. The float height would have to be awfully high to cause gas to come out the overflow. You might be able to do it on the bike but it's a lot easier to do off the bike. Pull out the float valve and inspect the tip. Make sure it is smooth with no evident nicks or deep grooves.

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1 Answer

2003 WR250 F - eng. won't idle down and carb starts to overflow


Hi Jwelden,
Have you checked the float level in the float chamber?
I guess you may have to reset the float pin adjustment, its allowing more gas to pass through thn required and thus the overflow!
Not bad too, when you are working on the float assembly take the opportunity to blow out the fuel line from petcock to the carburator via the seat for the float pin,any foreign particals there would stop the float pin to seal up and thus overflow.
Fit in an inline fuel filter , this will help keep out the dirt or whatever.
Hope this helps.

Knight (Yamaha Seca XJ750A 1981)


Feb 13, 2009 | 2003 Yamaha WR 250 F

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