Question about Toro 2-Cycle 25.4 cc Straight Shaft Gas Trimmer 51974

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Gas leak where gas lines enter and leave tank

Gas leaks at grommet where gas lines enter and leave gas tank. Can the grommet be replaced?

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Also, make sure that the vent for the fuel tank is working. the vent is either on the fuel cap itself or thru a device commonly known as a duck bill valve, so named because of the shape of the valve. All the vent does is allow a slight amount of air to enter the tank while the trimmer is running.

Posted on Apr 04, 2014


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1 Answer

Service manual for mcculloch mac cat 600038-30 chainsaw

fuel line is available by the foot from a mower shop
most fuel leaks involving lines and tanks can be traced to the rubber grommet at the lines to tank entry
take it to a mower shop and discuss the fix

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Gas leaks out around the gas cap when trying to trim anything above horizontal level. Replaced the gas cap and it did not fix the problem

most likely not the cap but the grommet around the 2 fuel lines at the top of the fuel tank
easiest fix is a new fuel tank that has the lines already installed

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I replaced the fuel lines on my Husqvarna 128LD and they are now leaking, is there a seal or a grommet of some sort to help seal it at the tank? I don't recall any when I pulled it apart.

Some fuel tanks will have a black rubber grommet that have holes for the fuel lines to go into, if your holes are in the tank itself, then no, there's no grommet. And if that's the case ,your lines are not the correct outer diameter. There are multiple sizes of fuel lines. In my shop I have multiple sizes, if you don't have that kinda stock, you're better off either ordering the ones of a parts drawing of your model or simply take your unit and old lines to the closest small engine shop and have them match em up, u actually can just bring the tank with ya.

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How do you hook up the fuel filter line inside the tank on a cs400

If you go online and search for the drawings for that saw you will see that the fuel pipe enters the tank at the top through a grommet. You will have to pop out this and then pass the pipe through this after passing it up through the hole from inside, long nosed pliers or tweezers will assist. Once you have that done stuff the grommet back into the hole and don't pUll it out again!!!!!!!!

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2 Answers

Gas leak at grommet on gas tank where gas lines enter and leave tank

Yes you should be able to replace the rubber tank seal that the fuel line goes through. Be sure to replace the fuel line(s) when you do.

Apr 01, 2014 | Toro 2-Cycle 25.4 cc Straight Shaft Gas...

1 Answer

Fuel leaking carb overflow

Hello Brian,
I would visually inspect fuel lines entering/leaving tank that go to the carb. These tend to get brittle and crack. Also, some models have a rubber grommet that the fuel lines pass through entering/leaving the tank, these too get brittle and crack. If that looks good, you may have a stuck needle in carburetor and it will need to be removed and serviced. Hope this helps. Good luck and happy wrenching!

I’m happy to assist further over the phone at

Sep 25, 2013 | Ryobi Garden

1 Answer

Cchanged furel lines on my string trimmer and now fuel leaks from where the line enters the tank

Your grommet might be bad or you might have gotten the wrong size fuel line.

Jul 28, 2012 | Troy Bilt Tb70ss Gas Trimmer

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My 89 nissan 240 sx fuel EVAP failed the smog test

The carbon canister may saturated. If you are one to try get as much fuel as possible into the fuel tank, that may be how it happened.

Also check the gas cap. There is supposed to be a one way valve to allow air to enter into tank, but not vent out in any direction but by the vent hose to the carbon canister. That valve may be leaking. Also, there is a purge vent to the intake manifold, check to make sure that passage is clear and not carboned up.

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1 Answer

Gas leaking from grommet that goes into the gas tank.model pb-2111.

replace grommet. you may want to replace the fuel lines to you can use echo part number # 90098. its a fuel line kit and it come with all fuel lines, grommet, fuel filter, and vent. its plug and play.

Sep 21, 2011 | Echo Garden

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