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Check that the fuel line has not dissolved in the tank if so fit new fuel hose or check tank for a crack.

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Fuel leaks happen over time because the fuel tank rots, gets old, or fails. If this happens, the entire thank may need to be replaced. It is much better to have a safe tank than one that is a fire hazard. Some fuel leaks happen because of a small hole in the fuel tank.
Overflow occurs when the oil level in the float chamber becomes too high, and the gasoline that exceeds the height of the overflow pipe in the float chamber is discharged to the outside of the carb..
Gas leaks around the lawn mower air filter can indicate your engine valves are not working properly. If your engine has a fuel shut-off valve, ensure that this valve is closed when the engine is not in use.
The fuel pressure regulator is leaking fuel into the intake manifold and may have even filled the engine oil with gasoline. You should have the fuel pressure regulator replaced and the oil and filter replaced.
Overfilling your gas tank can have serious consequences, both for the environment and for your safety. Not only can it cause environmental damage, but it can also lead to a potential fire or explosion.
Assuming all of your plugs and wires are in the correct locations and you haven`t messed with the timing at all, then the most common cause of backfiring through the carb (spitting or coughing) is in the morning when a carb`s air/fuel mixture is a bit too lean. This usually goes away once the engine warms-up.
First remove the fuel line from the carburetor and plug it so fuel does not run out. On the very bottom of the carburetor bowl there will be a small brass cover screw, using a flat screw driver, open this screw and allow all gas to drain from the carburetor system. Next, close the screw and reinstall the fuel line.
It`s never safe to drive a car with a fuel leak. Fuel leaks are one of the top causes of vehicle fires. Gas is highly flammable, so it is highly likely that the gas could start a fire, either in the vehicle itself or from the fuel left behind from a leaking vehicle.
With a fuel leak, a car is never safe to drive.

Since gas is extremely combustible, it is possible that it may spark a fire, either inside the car or elsewhere, if it leaks. Therefore, fixing the leak as soon as possible is highly recommended.

Avoid driving if you can – fuel is highly flammable and a spark in the wrong place could set it alight. Your fuel economy could be taking a serious hit as well! Fuel leaks usually occur because there`s a crack or hole in the fuel tank somewhere.

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I have a husqvarna 323L string trimmer. I stored it after running the tank & carb dry for about two years. I fueled it, then started it, & it ran for a minute then died like I turned the switch off. Since it would not restart, I found the fuel filter had broken off the hardened fuel line & it sucked gummy crap out of the tank & into the carb. Failing at cleaning the carb, I finally put a new carb on it & replaced the pump, hoses & filter. It has ran good till this year. I winterized it with stabilizer & left it with a full tank over the winter. The gas in the tank was gone when I got ready to use it this year. I filled the tank with premix, checked for leaks, then started it. It would run fine for about half a tank, start idling poorly (lean) then cutoff & refuse to restart till I refilled the tank. I finally found the tank had cracks & was letting pressure out of the tank & apparently this was causing the carb to lose it’s ability to siphon gas out of the tank. So I replaced the tank which came with new hoses & a filter, which I properly installed to the carb. It cranked right up, but when it runs a half tank, the carb quits sucking gas out of the tank. When I pump to prime the carb, it moves the fuel into the carb, but the pump never gets hard like it does when I prime the carb when the motor is cold. I have to keep refilling the tank, prime, & then it starts & runs until the tank gets about half empty. The new fuel filter is down in the gas tank properly, but It will not run after it shuts off until I refill the tank & prime. I’m baffled. New tank, new hoses, new filter, new carb, & I can find no leaks in the fuel system. It runs strong. The 323L is a two-stroke & it always cranks on the second pull from cold on a full tank. Any ideas?
ANSWER :

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Have a craftsman 16″ chain saw 358.360260. Could not initially get it started after it had sat for a couple years with fuel stabilizer in it. When I went to use it the fuel had all evaporated and the fuel pick line was rotted. I replaced that with some difficulty but finally got it on. Saw still wouldn’t start. Replaced the fuel filter. Still wouldn’t start. Pulled the carb apart and cleaned and recleaned everything. Diaphragms were good and I didn’t adjust any of the mixture screws because as I said it ran fine before storage. Non of the carb passages were clogged. Fresh gas 40:1, good spark plug and good spark. Airfilter is good. Engine has maybe about 4 hours of total run time on it. It’s a ZAMA (?) carb. It will run for about 30 seconds when I manually prime it by pouring a small amount of fuel directly though the carb. When I was disassembling the carb the vent hose that goes back into the fuel tank seemed to have a small out of ?substance? in it which I cleaned out. It was right at the end the of the hose that goes back into the fuel tank and not up by the carb. It didn’t appear to be like your typical gummy deposits/varnish though. I hope it wasn?t some type of spongy check valve stuff that is supposed to be in there. That might explain some of my problems. Anyway, I also can not seem to get the primer bulb to fill. When I open the fuel tank, look in side and depress the primer bulb, air bubbles come out of the fuel filter. But when I let the bulb reexpand there’s no fuel that gets sucked up the hose. I can however seem to fill the primer bulb when the fuel tank is full and the chainsaw is laying on it?s pull cord side and the bulb is depressed a bunch of times. The saw will also start and run again for about 15 seconds then die. It’s definitely not getting/fuel and probably running out . Thanks.
ANSWER :

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I know this is a pretty old thread. But I have a 2004 Husqvarna 359 and it does the same thing. Has anyone found the cause of the problem yet. It seems to die from lack of fuel or too lean of a mixture only when the saw is hot. I have : removed the cylinder and found it to be scored very bad, i replaced the cylinder and piston, replaced the fuel filter, removed the carb and checked for debris, new spark plug, new air filter, changed fuel to a 32:1 just to see, all to no avail. I dont know how to test the ignition module, and I dont know if there is a way to test the cranck shaft seals. If any one can give me advise from here it would be greatly appreciated. Thank You, Brian in Spokane Wa.
ANSWER : I didn’t want to close the thread in case someone else had some ideas. We can still discuss this problem. Enter any clarification or additional information below the advertisements. HTH
Lou
Hoped Dolf would chime in.

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The fuel lines have rotted out of the edger gas tank. How do I fix or do I need to replace entire tank with new fuel lines?Since there are no male fuel line connections exiting the fuel tank and just two holes where the lines were, I guess I need to replace the entire tank and get a new one with lines already attached. Thanks.
ANSWER : No you can buy replacement fuel line but you must reconnect the filter in the tank that line goes to the bottom of the carby then out the top of the carby to the inlet on the primer then out of the primer and back to the tank.

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Gas tank leaking
ANSWER :

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1999 ford expiodition
ANSWER : Use a pressure gauge to check pressure at the rail. Change fuel filter. Replace fuel pump if needed.

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Fuel lione and filter came off in the tank – Stihl HT101 Pole pruner
ANSWER : 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

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Why will my1994 bravada not start?
ANSWER : Very possible your new pump went out again, or was not installed correctly. Check fuel pressure. If you know electrical you can jumper the relay to run the pump. On some GM models I have seen a test wire for the pump underhood.

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