Motorcycles Logo

Related Topics:

A
Anonymous Posted on Dec 26, 2013

Gas leaks from small diameter hose continuously PW80

When shutoff valve is turned on, gas flows out of small diameter hose connected to carburator

5 Related Answers

Anonymous

  • 1 Answer
  • Posted on Dec 28, 2008

SOURCE: carburator leaking gas out of over flow tube

Sounds like a stuck float. try gently tapping on side of carb near bottom where float assembly is located to see if it frees up if it doesn't you will need to remove and clean your carb and check your float adj.

Ad

Anonymous

  • 4565 Answers
  • Posted on Jul 11, 2010

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)\\\\\

Anonymous

  • 66 Answers
  • Posted on Jul 14, 2010

SOURCE: gas flows out of the carburater drain hose

Sounds like your carburetor floats are stuck to the bottom of the bowls. You can try to tap the carb bowl with a screwdriver and try to get them to pop loose, otherwise you will have to remove the float bowl (usually about 4 screws on the bottom of the carb). All you should have to do is pull it down about 1/4" or so until the floats pop loose and then put the bowl back on. This is pretty common on bikes that have sat for a few months, especially if you are good about draining the gas from the carbs when you're storring it.

Anonymous

  • 2050 Answers
  • Posted on Sep 06, 2010

SOURCE: Gas leake from Air vent

If you mean that fuel runs out of one of the vent lines, note that one of those lines is for overflow from the carb bowl. If this is what is happening, you might have corrosion or dirt making your float needle stick, and overflow fuel to that carb. It needs to be cleaned out by removing the bowl, float and float needle.

Anonymous

  • 738 Answers
  • Posted on May 12, 2011

SOURCE: fuel leaking out of a

You need to remove carbs, clean float bowls, remove floats, fuel cut off valve under float, quite a big task so recomended fit new cut off valve in each carb, check also throttle slide mooves freeley before replacing, recently done the same job for customer, you could just clean float cut off valve but at twelve pounds each

ch you are best replacing them

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

0helpful
1answer

Outboard troubleshooting. I have a 75 hp Mercury with 2 carbuerators. Serial # 6559142 it's around a 1989 model.. Problem= tank bubble pumps up tight...sits for a minute and gets soft...when I pump it up...

Sounds like the fuel pump isn't working, you can buy service kits though quite often corrosion will prevent you from removing the valves.. or it could simply be the fuel cap isn't venting, remove fuel cap and see if the engine continues to run!
Mar 18, 2017 • Boating
1helpful
3answers

Gas leaking into carburator when shut down.

replace the needle and seat as they are not doing the job. Also you can purchase a small fuel tap and place it in the fuel line to turn off when you have finished.
1helpful
1answer

Gas shooting out of rubber hose above carburator. craftsman lt200 with kohler engine.

If hose coming off carburator does not connect to anything then it is the over flow for carburator when float gets stuck and does not close needle valve causing excess fuel in carburator bowl and is drained automatically through vent orfice connected to hose that gas is dripping from. If this is the case then remove carburator bowl, check float, needle valve and o-ring in where needle valve goes. sometimes when carburators sit over winter with gas in them the gas breaks down and over time will gel/harden and cause float to hang up and o-ring for needle valve to deteriate and not sealing properly. clean and replace parts as nessesary.
I hope this helped.
0helpful
1answer

Code p0401

EXHAUST GAS RECIRCULATION EGR SYSTEM INSUFFICIENT FLOW DETECTED.CHECK FOR VACUUM HOSE LEAK OR BLOCKAGE.CHECK WIRING CONNECTION.THE EGR VALVE OR ECM HAS FAILED.CHECK INTAKE PORT WHERE EGR VALVE SET ON.LOOK FOR CARBON BUILT UP IN SMALL HOLE BLOCKING OFF EGR FLOW.CLEAN OUT HOLE WITH A CLOTHES HANGER OR SMALL SCREW DRIVER
0helpful
1answer

Gas flows from cutoff valve to carburator hose connection but does not flow into carburator. What is blocking the flow?

On the top of the carburator there is a needle valve, closed by the float lever. 
If the carburator chamber is full with gas, the valve is closed and no more gas can enter the chamber.

If the chamber is empty and no gas flows inside, the valve may be stuck in closed position. Cleaning or some sharp (but not very hard) knoks on chamber cover may help.

Some times the float gets broken and falls down. This is a bigger damage, because it may lead to carburator overflow.
0helpful
1answer

Low flame

Next time you use the grill turn the gas on slowly. For some unknown reason when turned on quickly the regulator reduces the gas flow.
Another problem with some gas fittings is an auto shutoff if detects the slightest leak. Sometimes the shutoff is not 100% and allows a small amount of gas causing the weak flame.
1helpful
1answer

I have a Polan Model 2375 Wild Thing Chain Saw. The fuel lines have deterioated and I need to know correct routing of fuel lines. The primer bulb has to line connectors, one small diameter and one large...

A Poulan IPL for your saw “2375LE Gas Saw Type?” (LE is code for WildThing; if your saw is beyond serial -2 look at a saw without the LE; it makes little difference to the fuel system) can be found here:
Poulan.com
http://www.ordertree.com/modelinfo/POULAN-WEED-EATER/75.59.html
The dash number of your serial number is the type.

  • Small hose (filter on bottom) long enough to reach all corners inside tank, to lower carburetor connection. Please leave the 2 carburetor connections long enough to reverse until the saw is running.
  • Upper carburetor connection, small hose to suction side of primer.
  • Pressure side of primer (large hose) to tank fitting.
The IPL is deceptive it appears the filtered hose connects to the primer; it does not.

A typical fuel system and suggestion or 2 follow:
http://www.fixya.com/support/r3706813-2_cycle_fuel_system_repair

If you have more questions or need additional help please reply below and I will get back to you. Thank you for using FixYa and Good Luck. HTH
Lou
3helpful
1answer

Gas coming from black tube

Hi and welcome to FixYa,

Initially and to my knowledge, some of the hoses connected to a carb would be:
  • from tank through fuel shutoff valve;
  • overflow hose;
  • drain hose;
  • in some case a vacuum hose.
Of the above, the only possible hose that would fit your description would be the overflow hose. Should this be the case, then this indicates that the float inside the carb's bowl has not moved up to engage/close the inflow valve. A workaround is to tap the bottom of the bowl to jar the float to go up as well as the shutoff the inflow valve. The drain hose would also allow fuel to flow out from the carb but that would mean the drain screw is loose/opened.

Good luck and Thank you for using FixYa. Happy Holidays.

Pls be informed that due to my current rank and rating, even a Helpful would be detrimental to my status. Should this solution not address your concern, it would be appreciated if you could just not rate it at all. Cheers.
1helpful
1answer

Engine will turn over but will not continue to run

the fuel filter is in the tank on top of petcock that bike has a vacum operated petcock(fuelvalve)if the vacum hose is bad no fuel flow check the back of the fuel valve for a small hose that goes to the manifold make sure it is good put vacum on the hose wile hooked to the fuel valve and make sure that gas runs out of the hose give me a rate please hope this helps
0helpful
1answer

I need to turn off the gas from a gas dryer which has a small valve before the flexible tube that connects the line to the dryer. How do I turn off the valve?

If the valve has a shutoff lever, vs a round handle, turn the lever so that it is pointing against the gas line flow, rather than in line with the flow. If it has a round knob like that of an outdoor water faucet, I would recommend a plumber come in and change it to a certified gas valve, and let him explain the function to you.
Jun 11, 2008 • Dryers
Not finding what you are looking for?

864 views

Ask a Question

Usually answered in minutes!

Top Yamaha Experts

vince

Level 3 Expert

2530 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1212 Answers

littlewheel

Level 2 Expert

122 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...