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Not getting fuel to my carburetor! Brand new hoses no leaks...

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Check your fuel tank cap, pressure must be released from there you need to change the o ring on the fuel cap.

Posted on Jan 26, 2013

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Carburetor leaks fuel in the combustion chamber and out through the area of the throttle plate into the air filter.This happened after I had to replace the fuel lines .


This is not as easy as it appears!
The image below is the proper routing for the fuel lines from the tank through the primer and carburetor.

It is so easy to assemble this backwards and pump unfiltered fuel through the carburetor. Or Assemble it so that the primer pushes fuel into the carburetor.

The primer pulls the fuel through the filter located in the tank up the inlet hose into the carburetor internal fuel pump filling up the carburetor and purging out any air. The output of the primer returns any excess fuel back into the tank via the return hose.

26117870-p2kvwqjbo3oi50ps2xua1eg1-2-0.gif The center connection at the primer bulb is the output return to the tank and the off center connection at the primer bulb is the inlet from the carburetor.

26117870-p2kvwqjbo3oi50ps2xua1eg1-2-2.png If it is correct you need to perform a leak check on the fuel system. Reach into the tank and retrieve the fuel filter attached to the hose. Carefully remove the filter from the hose and with your finger over the end of the hose pump the primer. You should hold a vacuum. If the primer will not stay down air is leaking into the fuel system. Any air will disable the engine from running. The carburetor needs to be air free to function.

If air is not leaking from a hose connection and is internal to the carburetor it is likely that contamination has logged either in the needle valve or check valve.
Below is the check valve that prevents air from entering the fuel passages from the fuel jets when you prime/purge the carburetor with the primer bulb.
26117870-p2kvwqjbo3oi50ps2xua1eg1-2-5.jpg

If the carburetor is filling with fuel when you prime it is likely that the the primer is pushing (incorrect hose routing) the fuel into the carburetor through the impulse pump and through this check valve. Correct pluming and try again.

The needle valve is located under the four screws under the diaphragm and is actuated by the diaphragm.

Cleaning the check valve is almost impossible. Most have a rubber washer that can easily be moved out of place from the use of excessive air pressure. The claim is that the check valve can be replaced. I've never been successful and ended up replacing the carburetor. Messing with the needle and diaphragm has not always resulted Joy either. You can leak check the needle valve by plugging the inlet hose and pull the fuel out the primer bulb connection using the primer bulb. Cleaning the carburetor with the small holes and blind fuel passages can create a problem by plugging the tiny fuel feed holes you are trying to clean.. In the newer machine the adjustment screws are not removable preventing the cleaning of the needle clearances. This is a bumpy road well traveled by many!!
Hope this has been a help?

Mar 04, 2016 | Poulan Pro Gas Chainsaw 18" Guide Bar 42cc...

1 Answer

I changed the primer bulb on my echo srm-210 trimmer but it will not prime fuel in the bulb. The grummet the three lines go thru on the gas tank is not sealing the lines tight. Is this the cause?


If there is adequate fuel in the tank to completely cover the fuel filter than I expect the bulb to pull the fuel through the carburetor.

If you are able to determine the fuel intake hose (the hose that connects to the filter in the tank) to the carburetor than removing the hose from the carburetor and close off the inlet connection to the carburetor with your finger,

You should be able to achieve a vacuum that as you stroke the bulb that it eventually stays down and will only return the to the normal position when you release your finger from the carburetor inlet hose connection. This will leak check the bulb and carburetor. If this is successful drawing a vacuum than there is most likely a leak in the hose between the filter in the tank and from where you had disconnected the hose from the carburetor. Lowes and home depot provide a kit with a wire that snakes through the grommet allowing for this hose to be replaced..

If you cannot achieve a vacuum than the one way valves in the bulb prime are defective or an air leak through a check valve, metering diaphragm or fuel pump. A carburetor repair/replacement is likely

Nov 26, 2015 | Echo Garden

1 Answer

Fuel lione and filter came off in the tank


This is a simple repair.
1. Drain tank save fuel can be used again
2.Purchase fuel line replacement kit Lowes -Home Depot
3.Kit needs to contain feed wire and gas hose.
4.Disassemble cover to reveal fuel line connection to carb.
5. Feed wire from kit into fuel tank through fuel line hole.
6. Install new hose over wire connecting end into hook at end of wire
7. Pull hose through tank up to the carburetor
8. Remove wire and connect filter and hose to carburetor
9. Replace gas into tank, Ck for leaks

Nov 15, 2015 | Stihl HT101 Pole pruner

2 Answers

Why does my redmax ebz8500 blower start fine and run fine for a few minutes and then bog down and rev back up? The carburetor, air filter, fuel filter, fuel lines and spark plug are all brand new.


Based on the majority of small 2-cycle engines out there, I would suggest rebuilding the carburetor. It's easy to do and kits are usually $10 to $12. Remove the air filter and retrieve the number printed on the carburetor. Then, look on eBay or visit a local small engine repair shop for parts. Remarkably, there are a very small number of carburetors used on a majority of different brands with 2-stroke engines. So, if you buy a kit based on the carburetor number, don't worry if it's not directly referenced to your particular brand of blower.

Sometimes, you can get positive results by partially disassembling a carburetor and cleaning it with spray carburetor cleaner from Walmart or Auto Parts Supply store. But, if you're going to that much trouble, you might as well replace parts as you go. Over time, rubber seals dry out and plastic reed valves leak by. Recently, my chain saw was acting up. I replaced hoses, filters, spark plug, etc. Even flushed the carburetor with cleaner. Nothing helped. But, once the carburetor was rebuilt, it purred like a kitten. I've experienced the same thing with weed-eaters and other engines, too. Fortunately, 2-cycle engines are not complex and usually easy to fix. Good luck!

May 05, 2014 | Garden

1 Answer

Fuel leaking out of 2 hoses connected to the carb cant stop the fuel leak


Inspect the fuel inlet hose closely. If you notice a wet spot around the hose where it joins the carburetor fitting, or the hose has become swollen, soft, brittle or hard, replace the fuel hose and the small fuel filter inside the carburetor fitting. Install a new worm clamp to tighten the new fuel hose to the fitting. Use a Phillips screwdriver.

Check for a fuel leak around the accelerator-pump cover assembly. Some carburetor models come equipped with a diaphragm-accelerator pump on the side of the unit. If the cover screws have come loose, fuel will leak through the diaphragm and external cover. Look for a square cover on the side of the carburetor and tighten the cover mounting screws at each corner with a Phillips screwdriver.

Look around the gasket located between the carburetor upper body and the main, or lower body. This gasket may have worn out or the carburetor upper body mounting screws may have become loose, allowing fuel to leak outside the carburetor.

Ensure the upper body mounting screws are tight, if you found a leak. If they are tight, remove the clip holding the throttle linkage to the carburetor with a pair of needle-nose pliers and reposition the linkage to the side. The linkage allows the driver to operate the throttle plates in the carburetor through a cable when depressing the accelerator pedal. Unfasten the screws holding the carburetor upper body from the main body with a ratchet, short ratchet extension and socket. Remove the old gasket and install a new one.

Inspect around the bottom of the carburetor where it joins the intake manifold if no leaks were found around the gasket located between the carburetor upper body and the main, or lower body. If you find a wet spots or marks around the bottom of the carburetor, the base plate gasket is leaking. Remove the upper and main carburetor body using a ratchet, short ratchet extension and socket. Install a new base gasket and replace the carburetor assembly.

Jan 21, 2012 | 2009 CCM RL 125

3 Answers

Replace fuel line in husqvarna 141 chain saw


The fuel line on the 141 is very small and wasn't really meant to be replaced for some reason, as it is a pinch fit. Buy the smallest fuel line you can, usually 1/8th OD inch fuel line. Remove the air-filter and the carburetor. You will need to drill out the
current hole a little bit, so go slowly. As soon as the new fuel line will fit _tightly_ insert the line. You will have to remove the hand-bar and the
anti-vibration bolts to separate the motor mount portion from the gas tank which is part of the hand grip.

Apply some gasoline proof gasket sealant to the space between the gap, else you will have a gas leak from the tank sooner or later.

Reassemble the grip and motor sections back together and let the sealant dry for a day or so. Put the carb and air filter back on and attach the fuel line to the carb and the other end to the fuel filter in the gas tank.
4_21_2013_5_12_53_am.jpg

Jan 07, 2012 | Husqvarna Garden

1 Answer

What makes a taurus se engine shake at ideal but when speed up smoods out


Tom,
Generally, this is caused by either a vacuum leak somewhere on the top of the engine or dirty fuel injectors. Listen carefully for a vacuum leak [sucking air sound] at or near the top of the engine. Another way to locate a vacuum leak is to spray carburetor cleaner [aerosol can] at small areas, where there are vacuum hoses or intake gaskets. When you find the area of the leak, the carb cleaner will get sucked into the leak. This will generally cause the engine to run better.
Try adding fuel injection cleaner to the gasoline tank. I recommend the Chevron Techron brand of fuel injection cleaner. Advance Auto and Costco carry this brand.

Dec 11, 2011 | 2003 Ford Taurus

1 Answer

Hello, we have a polaris (2006) 500 sportsman ho..while riding today, unit stopped. looked at rubber fuel line that has an opening (or valve?) that had fuel coming out..is this a broken valve?? RJ


If it is a rubber hose coming from the bottom of the carburetor it is the overflow. If that's the case the needle & seat in the carburetor is bad or has something blocking it from closing. This will allow too much fuel into the carburetor and flood the atv as well as leak out of the overflow. If it is the main fuel supply line from the tank, it will go into a fuel valve located on the left side of the machine (on, reserve, and off). If it is leaking from that hose it can be fixed with a new hose. Let me know if this helps or if you have any other questions, Daniel.

Sep 02, 2011 | Polaris ATV

1 Answer

Tried to repair a gas leak under car . we tried to repair the hose now it doesnt leak from above the hose only under and used 2 clamps and it is tight as we are able to get it is it the metal piping ?


you don`t say what type of fuel system you have,carburetor or fuel injection,throttle body or port fuel injection system.this determines the type of repair.if it is port fuel injection then you cannot repair with a hose,it must be repaired with a steel line as the fuel pressure is above 30lbs pressure and rubber hose is not strong enough for the pressure.you can replace the section of line that is bad with a new steel line connected to a good section.if it`s carburetor the pressure is only about 6 to 8lbs pressure,and a hose can make the repair.if it`s throttle body then the pressure can range anywhere from 15 to about 20lbs pressure,this can be repaired with fuel injection gas hose,so you can see it makes a difference what system you have.any rubber hose used must be a fuel line hose not just any rubber hose.

Mar 15, 2011 | Chrysler New Yorker Cars & Trucks

2 Answers

Car starts fine, when I push on pedal it lulls or struggles for gas, 1986 new yorker, I can still drive on road but have to pump pedal to keep motor accelerator


Make sure the carburetor is bolted down securely so that no air is leaking in under it. Make sure the screws around the top of the carburetor are secure.

Being careful, get your head down into the engine compartment while the car is idling, listening for an air leak.

Take an unlit propane torch that has the valve open, and pass it along all the intake component mating surfaces. When you get to a leak, fuel from the torch will pass through the leak rather than regular air, and the engine will speed up a little (or a lot). Point it at all vacuum hose ends (both ends of each hose).

Jun 15, 2010 | 1986 Chrysler New Yorker

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