Question about Craftsman 25cc Gas Line Trimmer

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I replaced the primer bulb and the unit worked fine for a while, but then the fuel line came loose. When I tried to reattch it, it broke. When I pulled the cover off there were three lines, two from the gas tank and a third connected to the carburetor but not attached to anything else. Don't know if it came loose when I removed the cover or what happened. Need info on fuel lines and hookup.

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One line goes from the fuel filter in the tank to the primer. One goes from the primer to the carb. The last one goes back to the tank. Hope this helps...Lee

Posted on May 29, 2010

Testimonial: "I found two attachments (ports?) on the carburetor, I assume you mean one (lower port?)should be attached to the small line coming from the primer and the other (higher port?) attaches to the second (smaller) line coming from the tank? Thanks for the previous help and any additonal help you can give."

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1 Answer

Toro s-620 fuel primer button broke


any primer bulb will work if you install it between gas tank and carb in the fuel line

Jan 06, 2015 | Toro Garden

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My prime bulb looses pressure and first start is hard. I have to remove fuel line from filter and cover with thumb prime re install then first start takes time.


Does the engine run fine after it starts? Most common problem with primer bulb losing prime is an air leak in the fuel line or primer bulb. Air leaks don't always leak fuel. If there is an air leak between the primer bulb and gas tank there is no pressure, only vacuum. If it is not a major leak it might not leak without pressure but it will allow air to enter the fuel line. If it is a very minor air leak it could allow air to replace the liquid in the fuel line over time, but so little air once it is primer again that the fuel pump can over come it with volume of fuel.

Primer bulbs do not stay firm, as they are when initially pumped up, after the engine is running. There are check valves in the primer bulb that hold pressure in the primer bulb and throughout the fuel line to the engine. Once the engine starts the fuel pump creates vacuum drawing fuel into the engine diminishing this pressure and releasing the check valves. At this point the primer bulb is just another segment of fuel hose allowing fuel to pass through it as the fuel pump demands. The primer bulb functions much better when the outlet side is higher than the inlet side. This position makes it easier for the check valves in the primer bulb to seat and release as needed. If the primer bulb is functioning properly and is positioned with the outlet side higher than the inlet it should not be necessary to cover the end of the fuel hose with your thumb to get it to prime.

If the engine is hard to start after being fully primed there could be a problem with the fuel system on the engine. Some engines are hard to prime once air has entered the system, especially fuel injected models.

Dec 19, 2014 | Boating

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Primer bulb won't reinflate on Craftsman weed eater after replacing fuel lines


Sounds like bulb not seated well...check to make sure it has all seals in place. Some pop in, some seal with a rubber seal.

Apr 10, 2014 | Garden

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How to replace the fuel primer bulb and fuel lines in McCulloch 3516 chainsaw? the fuel primer bulb broke and the plastic lines have crumbled. i need to know how to run the lines from the fuel tank to...


I just did a primer bulb not too long ago, but I don't remember what equipment it was on. They are generally easy to replace. First, remove anything that is retaining the bulb assembly, such as cover plate. On my Homelite chainsaw, I simply pried it out with a small screwdriver.
The replacement part itself has two barbed stubs that the two fuel line hoses push onto.
Make sure that you keep the fuel line tubes above the fuel level at all times to prevent leakage.

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Craftsman weed trimmer primer bulb is working in reverse


Make sure the line is near the botto ofthe tank.Thanks you for asking and I hope it helps.Please leave me a 4 thumbs up.

Jul 19, 2010 | Craftsman 25cc Gas Line Trimmer

1 Answer

Troy bilt gas trimmer gas lines broke and now I'm not sure which lines go where.


The gas lines probably broke because of the ethanol-laced gasoline we have to use nowadays. It deteriorates them. If the unit has the external purge/primer bulb, the way mine did, it is not that hard. Just remember...the primer bulb "pulls" fresh fuel from the fuel tank to and thru the carb, thus pushing out any air/old fuel in the metering chamber of the carb back to the fuel tank in the return line...that said..
Fuel tank...2 lines...smaller diameter line goes directly to the carb body. There are probably 2 brass nipples on the carb. This line goes to the one on the body opposite the end of the carb with the vent-hole in the cover. This is the fuel pump end...where fresh gas enters the carb.
The larger line out of the fuel tank connects to the longer nipple on the purge/primer bulb. This is the fuel return line.
The remaining fuel line (larger diameter) goes from the vented-cover (has writing on it) end of the carb to the shorter nipple on the purge/primer bulb. This line carrys air and old fuel OUT of the carb to the bulb where it is then PUSHED back to the fuel tank via the return line...so you have a small diameter supply line to carb...an intermediate larger diameter line from the carb to the bulb and finally the larger diameter return line from the bulb BACK to the fuel tank.
Go to a small engine shop and purchase about a foot each of the 2 different diameter fuel lines needed and install those new "Tygon" fuel lines as your fuel line replacement.

Jul 09, 2010 | Troy Garden

1 Answer

Pressing and reloeasing the primer bulb does not bring any feul to the fuel line. I have checked connections and they are secure.


The primer bulb may be the problem. They will get soft and loose their suction ability. Also the fuel lines can crack and cause this. If you replace the primer bulb be sure to make a sketch where the fuel line go.

Apr 27, 2010 | Garden

1 Answer

Poulan 2150 put new fuel lines on geting gas trew line put the primer buld will not prime and somtimes gets stuck but will release win i pull it of carb


Check the condition of the primer bulb for hardness or cracking. If ok, remove the line that goes from the bulb back into the tank and try to pump fuel from the carburetor. If nothing, switch the position of the other line at the back of the primer and try to draw fuel again. If hooked correctly, the primer will pull fuel through the carburetor body filling all cavities and into the primer bulb. If still nothing, try switching the lines at the carburetor (it should not pump backwards through the check valves in the pumper chamber). If still nothing, switch the primer connection again. Some combination of line connections should allow fuel to be pumped through. When correct, reconnect the loose primer line to allow fuel to return to the tank. This is a good reason for replacing only one line at a time. Hope this helps!

Apr 24, 2010 | Garden

1 Answer

Gas line broke at top of gas tank fuel filter loose in gas tank


You may find these helpful. Typical fuel system:
5114cbb.gif No model provided; may not have primer.

Fuel Line Replacement by SmallEng.com
http://www.youtube.com/watch?v=JrXpU70Hmi0
  • The hose in the tank with the filter on the free end connects directly to the carburetor input connection.
  • If the saw is equipped with a primer bulb, an output line from the carburetor connects to the suction side of the primer (once the bulb is collapsed it draws fuel from the tank through the carburetor to refill as it inflates).
  • The pressure side of the primer returns displaced fuel to the tank as it is depressed.
Take lots of notes and a few digital photographs to help with reassembly.

HusqvarnaUSA.com
http://www.husqvarna.com/us/homeowner/support/download-manuals/
Enter the 3 digit model number (no XPs, Es, just the numbers)
Serial number decode – useful when downloading IPLs and Manuals
06 1500198
06 = year produced – 2006 (single digit before 2000)
15 = week produced - March
00198 = 198th unit Husky produced that week
HTH
Lou

Dec 20, 2009 | Husqvarna Garden

2 Answers

I have a poulan 2150 chainsaw. I replaced the


Fuel Line Replacement by SmallEng.com
http://www.youtube.com/watch?v=JrXpU70Hmi0
  • The hose in the tank with the filter on the free end connects directly to the carburetor input connection.
  • If the saw is equipped with a primer, the output line from the carburetor connects to the suction side of the primer bulb (once bulb is collapsed it draws fuel from the tank through the carburetor to refill the bulb as the bulb refills).
  • The pressure side of the primer returns any excess fuel to the tank as it is depressed.
HTH
Lou

Oct 25, 2009 | Poulan Pro 16-Inch 38 cc Anti-Vibration...

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