I have removed the hardend and breaking gas lines from the gas tank and associated primer bulb and carberator and now need to put the new lines in. What is the trick to getting the new lines into the hole in the gas tank. Also where can I find a diagram on the arangement of these lines.
I had the same problem. I ended up cutting the fuel line off at a sharp angle. This allowed me to fit enough through to reach with a pair of skinny needle nose pliers. I would also like a diagram of the lines to make sure I hooked them up correctly.
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if you have gas in the primer bulb its working. gas is sucked from tank to carb , out return tube to primer bulb and back to the tank from the primer bulb. most likely dirt in carb or hard diaphram not opening needle valve allowing fuel to be sent. carb kits are around 12 bucks . but carbs for troybilts are usually only 20 bucks. I would just replace the whole carb if the case. if the bulb stayed empty I would look for broken fuel line in the tank that holds the fuel filter. they rot and break off within a year or two.
Chainsaw fuel lines enter the gas tank from holes in top of tank. They are sized for a tight fit to prevent leakage. Make it easy on yourself when pushing the line through the tank by cutting a long lengthwise taper cut with razor knife 3 inches or longer to easily feed through that tight hole. Once started you will then have to grab it through the gas cap hole with needle nose pliers, then cut the tapered end flush and add fuel filter. Readjust inside length by pulling from above, then cut to length to upper carb fitting. If connecting to primer bulb a filter is not required and make sure the line goes to fitting on primer bulb marked tank.
There are two holes in the fuel tank, it does not matter which line goes to which hole. The lines should run as follows: One line from the tank should have a filter on it, connect this line to the primer bulb and put a mark on it with a sharpie. Another line should run from the bulb to the carb, and the last should run from the carb back into the tank. After they are all in place, pump the bulb and watch the gas in the marked line. If gas is flowing from the tank through the marked line into the bulb and on to the carb you are done. If gas is flowing towards the tank in the marked line or not at all reverse the two lines on the bulb and you're done.
Check the fuel filter for plugging. Check the fuel lines for decay or other damage. Inspect the primer pump carefully for any cracks or holes in the bulb part. The primer is supposed to pull fuel through the carburetor from the tank supply line and filter and return it to the tank. Hope this helps!
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, the 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 the bulb 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 will help with reassembly. HTH Lou
the primer bulb draws gas through the carb 'C' and back to the tank'T' leaving a small amount of fresh gas in the carb.to replace the lines from filter to carb & bulb to tank,you may have to remove handle & split the housing halves to find where lines enter tank.look in tank W/ a flashlight.to replace lines cut new line on an angle,feed a piece of # 14 copper wire through hole from inside tank.slide new line over wire,the wire will help align fuel line with hole.use needle-nose pliers to push line into tank,& to pull it through once you can see it.cut off end of hose you beat up with pliers.push filter on hose to carb.drop it back in tank."T' line is the return.dosn't matter which line is through top or bottom hole.
There ARE two holes in the tank. One samll and another larger. One is on the left side and the other is on the right. Look carefully and you'll find them. As far as connections of the fuel lines:
The line from the fuel filter in the tank goes directly through the small hole in the tank to the top nipple on the carb thus giving the carb a constant supply of fuel when running. The primer bulb is used only for "priming" and does not play a part in the fuel flow after that function. The bottom nipple on then carb then goes back to the nipple on the primer bulb which is clearly marked "Carb". The above connections are made with the smaller diameter tubing. From the primer bulb, marked "Tank", the larger diameter tubing is routed to the large hole in the tank. The tubing goes into the tank only 1/2 to 3/4 inch. As far as getting the tubing through the holes in the tank, cutting the tubing at a slant. But no matter what you do it is still a witch. Be patient, use some Vaseline and avoid the temptation to get out the drill and **** the hole to a larger size.
This is the same problem I have with a Mac 3200. I have: (1) A line from the primer bulb to the front port on the carburator. (2) line from fuel tank, with attached fuel filter, to the other primer bulb port. (3) Line from port on back of carb. to ????. I thought it must be a pulse line, but not certain, and don't know where to run it to. Please let me know when you find out.
This post helped me with my McCulloch Mac 3216 chainsaw. There are two holes in the gas tank - one above the other. One is for the gas line (with the filter on the end) and the other is for the overflow - a simply line that runs from the "out" nipple on the primer bulb into the gas tank. The filtered fuel line goes to the nipple on the back of the carb. Another short line goes from the "in" nipple on the primer bulb to the nipple on the front of the carb.
There are two notches just out from the two holes in the gas tank for holding the lines that go in -- this may help you locate the holes.
I found it helpful to pull the lines that go into the gas tank out through the gas cap hole and leave them hanging out until the housing was reassembled. I also left the lines that plug into the primer bulb hanging out through the hole where the bulb goes until the housing was put back on. Leave plenty of extra line for the lines going out to the primer bulb. Once the housing is in place, cut the lines to the primer bulb and attach them, and slip the lines into the tank, making sure the ends are as far down in the tank as possible. You will need this extra "slack" to work with the housing to get it back on.
Take top cover off(3 screws). Take off the 2 nuts holding the carb on. Pull carb part way out to access the hoses. Remove the 3 old hoses after making a diagram of where they connect. Buy new hoses. Cut one end of the small hose on a bevel, pierce both sides 1/8 th inch from the end with a needle. Thread a thin wire through both holes. Thread both wire ends into the gas tank. Use a hemostat or long needle nose plyers to pull the wires and then hose down into the tank. Attach the weighted fuel filter. The other end of this smaller diameter fuel line goes on the upper nipple on the carb. Take the side cover off (4 screws) to access the primer bulb. Take 2 screws out to remove the bulb which has 2 nipples. The longer nipple connects to the larger diameter hose which goes to the fuel tank. The larger diameter tube has a coupler on the end which is inside the gas tank. It took me an hour to change all 3 hoses. Bob