, No.455 Rancher, 20″ Gas – Powered Chainsaw

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Most cahin saws have a plastick tank witch splits under presher,, its most likely the tank leaking but it may be a fule line if you lucky

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If the gas cap is still leaking after replacing the gas cap, your problem is probably being caused by a warped or broken fuel tank. Fuel tanks can get warped if they are overheated or come into contact with hot materials. You will likely need to replace the fuel tank unit if it continues to leak.
Most commonly either the fuel is stale or mixed incorrectly or incorrect oil. Next is maintenance of the unit, air filter restricted, spark arrestor, carburetor adjustment.
This may not seem important right away, but without an air-tight seal, the fuel system can be contaminated with grime and dirt. If the gas cap isn`t closing properly, check the gasket to be sure it`s not brittle or missing. If you have an old car or truck, be sure the metal gas cap isn`t damaged or bent.
A loose gas cap will not only let in grime and dirt, but it can allow fuel vapors to escape the fuel tank.
chances are you just overfilled the tank, although more often than not the breather hose is used to let fuel vapours escape, occasionally a bit of fuel can get into the hose if it has been overfilled.
The most likely parts causing these problems are a leaking fuel injector, a fuel regulator that`s stuck closed, or a restricted fuel return line. If you have any of these problems, they are quite serious and you need the help of a specialist to fix them.
Do not overtighten your gas cap. Listen for one click and stop, otherwise you can damage the seal and your check engine light may come on. Never buy aftermarket or locking gas caps. They do not seal properly most of the time and may cause your check engine light to come on.
The most common cause of a fuel leak is a worn or damaged fuel tank. Over time, the walls of the tank can become thin and brittle, which can lead to holes and cracks. This can be caused by exposure to the elements, such as sun and rain, or by physical damage, such as from an accident.
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.

Discover Relevant Questions and Answers for Your Specific Issue

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55 leaks gas from cap just installed new one still leaks
ANSWER : Most cahin saws have a plastick tank witch splits under presher,, its most likely the tank leaking but it may be a fule line if you lucky

Just bought a used leaf blower, homelite, gas leaks out of the gas tank, where the gas tube fits into it.
ANSWER : “top of the gas tank where the gas tube fits into the tank”

I assume you’re describing the gas tank cap. if so, the o-ring is missing from the gas tank cap. You can find those at hardware stores.

Gas tank leak – Husqvarna , No.455 Rancher, 20" Gas – Powered Chainsaw
ANSWER : From weher? between cap?

Gas leaks out during use. – McCulloch 26cc Gas Blower Mcb3208
ANSWER : Mine is doing the same thing, I need to replace the gas cap on it. The other thing that you need to check is the fuel lines, the ethanol eats everything up.

Gas leaking out of center hole on gas cap sears weed trimmer 358795150
ANSWER : I had same problem and got a replacement cap at a small engine shop. Seems there is a baffle in the cap to allow the tank to vent and to close off to prevent fuel leaking. Appears rubber baffle deteriorates over time.

2 cycle mantis tiller leaks gas thru the carb. – will not start?
ANSWER : If it leaks gas,it can **** air.you have to find out whats leaking and stop it.

How do you fix a broken gas line to gas tank that was previously glued but does not hold and leaks gas to a Poulan GE21 weedeater?
ANSWER : Buy a new gas tank! Are you serious! Or buy a new weed eater, if you can’t live without this one, those models are cheap, don’t waste your time.

Gas leaking from fuel pump area – Toro Lawn Mower With Toro Power Tools
ANSWER : Check to see if pump is loose, possible crack in pump, bad gasket, fuel lines to and from pump may have bad seal to pump ,or need replacment due to ageing