Question about John Deere J3816 Chaninsaw Switch

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Fuel line in tank has come loose, where does it connect inside tank

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Some just connect externally to a barb fitting, but usually the fuel line and filter are all one piece. They are a bear to remove and replace because most of the new saws have a built in grommet in the fuel line itself to seal the plastic tank hole as it passes through it. Yours may have broken off inside the tank at the grommet. If so, its time for a new line/filter.

Posted on Apr 21, 2015


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Fuel pump replaced 3 times. Now gasoline is pouring out underneath

The fuel pump is located inside the fuel tank. It's possible that the last time it was replaced, one of the fuel line connections was left loose. Have it checked out immediately!

Jul 23, 2014 | 2000 Ford Contour

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How does a weadeater edger pe550 gas lines hook up inside of the gas tank?

I am not familiar with your brand of machine, BUT... many machines have similar fuel line setups. Here\'s what I know.

Most carburetors have built-in fuel pumps that suck fuel from the tank. As the fuel pumps generally suck more fuel than the engine needs, there is a "fuel RETURN line" from the carb back to the fuel tank, which returns the excess fuel back to the tank. There is usually nothing attached to the end of this line inside the tank.

The "other" fuel line is from the tank TO the carb, and it usually has a tiny, weighted, fuel filter attached to a long piece of fuel line INSIDE the tank. This long, flexible, floppy piece of tubing allows fuel pickup regardless of how, what position, the machine is held.

The purpose for this set-up is threefold:

  1. The filter, of course, is to keep "trash" out of the fuel system and,

  2. The "long" fuel line inside the tank is to allow the filter/pick-up end of the fuel line to move around in order to pick up fuel from ALL points inside the tank,and

  3. The weight is to forcefully "carry" the filter/pick-up intake to the low point ["bottom"] of the tank regardless of the orientation of the machine and fuel tank!!!

On the machines that I replaced the fuel lines, to replace the suction line I had to use a longer than normal [when finished] length of line.

I first had to "fish" the filter, weight, and any nipples and or washers out of the tank.

  1. I then inserted the new line into the tank from outside through the small hose opening hole.

  2. To start, I put MUCH MORE [extra] line into the tank so that I could fish-out 5 or 6 inches thru the filler opening, allowing me to finish the connection of the filter, weight, nipple(s) and/or washers outside the tank where I had room to work!!!!!

  3. The use of nipples with washers expands the hose enough to keep the assembly from easily falling or pulling from the tank.

  4. Once all of the "in-tank" assembly was done, I then gently pulled the extra fuel line back out of the tank hole, thus pulling the weighted filter and connectors back into the tank. I left enough "loose" tubing inside the tank to allow the weighted fuel pick-up end to reach anywhere inside the tank.

  5. The final step was to route the line to the suction nipple on the carb, cut the line to proper length, and attach it over the carb suction/intake nipple.

Not being familiar with your machine, I can only hope this allows you to fix your machine! Good luck!!!!!

Jul 23, 2014 | Poulan WeedEater Hedge Trimmer 25cc Engine

1 Answer

Craftsman Gas Powered Blower Mode 358.794772: Fuel lines broken and need replacement. Have new parts from Sears. One fuel line goes to the carb and connects to the fuel filter inside the fuel tank The...

A special fuel filter must be on the end of the fuel lines going into the tank, the line should be long enough for the filter to move around by gravity to stay in the fuel as the tank empties.

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1 Answer

Need to see gas tube connections inside of bvm 200 vs

larger diameter fuel line leaves the carb from the spigot nearest the primer bulb and terminates just inside the fuel tank. The smaller diameter fuel lines is the main feed. It will have the filter on the end of it and it should lay loosely on the bottom of the fuel tank and go to the spigot on the fuel pump side of the carb.

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I have a craftsman chainsaw 2.2 cubic and there are 3 fuel lines two comming from the primer bulb and one going from carb into the motor or crank. The return is connected to a nipple on the crab and the...

This is a common problem. The fuel lines can become brittle and fracture, or sometimes they swell and will not stay on their connections.

The tube that connects between the carburetor and motor is likely used to pulse the fuel pump that is internal to the carburetor.

The primer pulls the fuel through the carburetor drawing the air out. As the primer is stroked first air than fuel is pumped out of the carburetor. The output of the primer returns to the fuel tank. That fuel line appears to have failed or become disconnected in your craftsman. Either the hose has broken at or near the fuel tank, or has pulled out of the tank. There is a small hole in the tank for many machines. The hole is smaller(providing a seal) than the tube diameter requiring a minor force to squeeze the tube back in place.

Look for the fuel feed tube that also connects from the fuel tank to the carberator. Any loose connections will allow air into the carberator and it will not beable to run.

Important is that the fuel feed tube can not be switched with the return tube from the primer. Connected inside the tank is a fuel filter that protects the carberator from contamination.

Hope this helps?



Jun 28, 2017 | Poulan Pro 42CC 2 Cycle Chainsaw, 18"

1 Answer

There are 3 fuel lines on my Poulan 2150, 2 - 1/8"...

The 'vent looking device' should be the fuel filter--remove it and make sure it is not plugged. The other end of that line should go to the carburetor inlet port near the top. When you get the line connected, pump the primer several times (tank is filled with fuel mix and the small line returning to the tank is pulled loose from the primer port) to see if it pumps fuel through the carburetor into the primer bulb. If it does not, swap the line from the carburetor to the other primer port and retry pumping again. If fuel fills the bulb, then plug the line from the tank to the vacated port on the primer. This will pump excess fuel back into the tank. Hope this helps!

May 17, 2010 | Garden

1 Answer

How to install both fuel lines to fuel tank. I see they go in at the bottom of tank but also see that lines have to be pulled from inside of tank. What tool do you use for this? Is there special tool that...

The duck bill valve (vent) is usually attached to a hard plastic nipple that the hose attaches to (in the tank). To route the fuel lines through the holes in the fuel tank, take a scissors and cut a long angle on the line so that it goes from round to half round to a point within about an inch or two. With a tweezer, hemostat or long needle nose pliers, the line can be easily fed through the hole and then pulled through from the other side. Once you have the hose pulled through the tank, the tapered part can be cut off so it can be fit to the carb or primer line. If there is a primer/purge bulb, remember the fuel goes from the tank to the carb to the purge bulb then back into the tank.

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It be probably in the tank,check the pipe that goes inside the tank.

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2 Answers

Loose Fuel Line In the Gas Tank

hi rhopdo

try to find the spark plug near the muffler(exhaust)
check where is the hole from the gas tank, connect the fuel line to the carb.

yours savumihai71

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