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Chainsaw wont stay running

I replaced the primer lines new filter it did run but after replacing everything it will only run if i keep pressing the primer button then it run good until i stop pressing it. i tryed reversing the lines incase i got them wrong didnt help

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  • Husqvarna Master
  • 14,384 Answers

Get a carb. rebuild kit.

Posted on Nov 30, 2012

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Replacing a fuel line for a Poulan 2175 type 2 chainsaw

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

Posted on May 14, 2009

dontbother10
  • 2220 Answers

SOURCE: I have a McCulloch 3200 chainsaw on which I

From the fuel tank to the carb, from the carb to the primer, from the primer back to the fuel tank. The bulb sucks fuel through the carb excess fuel is returned to the tank. HTH
Lou

Posted on Oct 08, 2009

dontbother10
  • 2220 Answers

SOURCE: Poulan chainsaw primer bulb replacement

Hello Jay;
The primer listed for your saw and sold by Poulan does not include hoses (do an Internet search for the part number below, there are photos). Hoses are sold separately and are 2 different sizes. You can cap the carburetor to primer connection at the carburetor and your saw will run as all chainsaws did before the addition of the air purge system.

An example of a Poulan "2375LE Gas saw Type 2" follows (may not be your saw):
The IPL (exploded parts list) for your saw is the only detail for fuel line routing and it is sketchy at best; components are listed but may be on different illustrations.
http://www.ordertree.com/modelinfo/PWE/2375LE-Gas-Saw-Type-2/75.2375LE-Gas-Saw-Type-2.1.59.1.html
See the "Engine Assembly" print; item 4; pn 530047213.
Small hose in the tank with a filter on the end (long enough to reach all corners as the saw is moved) the opposite end connects to the carburetor.

A second small hose connects between the second carburetor fitting and the suction side of the primer.
A large hose connects between the pressure side of the primer and fuel tank (return).
I suggest you replace ALL hoses. Do you change tires on at a time?

Plumb the system EXACTLY as the diagram shows. If it will not run you have the 2 connections on the carburetor reversed. It might make sense to leave them long enough to swap until everything is working.
A typical fuel system and a couple of suggestions can be found here:
http://www.fixya.com/support/r3706813-2_cycle_fuel_system_repair

If your saw is not a Type 2 or an LE (code for Wild Thing) you can find the correct IPL here:
Poulan.com
http://www.ordertree.com/modelinfo/POULAN-WEED-EATER/75.59.html
The dash number of your serial number is the type.

If you have more questions or need additional help please reply below and I will get back to you. Thank you for using FixYa and Good Luck. HTH
Lou

Posted on Mar 15, 2010

  • 1 Answer

SOURCE: Just replaced fuel lines and

Line from fuel filter goes directly into the inlet of the carburetor and the line from the snap in bulb that is marked "in" attaches to the other outlet connector on the carb. Last is the long side of the bulb goes to the return on the gas tank. The snap in bulb sucks the gas but not directly from the filter hose, it does this through the carb as if it were trying to not only **** in the fuel but also removing the air trapped in the carb. You'll notice that the bulb has a **** side and a discharge side, and the **** side goes directly to the carb outlet connector. I tried to make this a clear as possible, and I hope it helps.

Posted on Oct 17, 2010

hunter19_46m
  • 7482 Answers

SOURCE: I have a Mac 3200, I replaced the fuel lines and

Hi www donbened...
I will also include a fuel routing picture.
Sounds like you have dirt/debris in your caburetor jets,fuel passages or a diaphgram that is becoming non-flexible.
Check/Clean/Replace your Air Filter, a dirty air filter can make your engine run to rich with fuel.
Note: ALWAYS USE COMPRESSED AIR TO CLEAN YOUR JETS AND PASSAGES, VERY IMPORTANT.
Note:Before you disassemble the carburetor:
Write down on a piece of paper or take a picture of how the linkage attaches to your carburetor for later reference when you go to reinstall your carburetor.
Mark each piece with a awl, or some kind of instrument that will make an alignment scratch before you disassemble the carburetor into separate pieces.
That way you will know which way it goes back together when you reassemble it.
Sometimes you can get by with priming the carburetor or by using a very small shot of starting fluid and letting it run a few times like that, and it will flush the gunk out of the jets,but most of the time you will need to rebuild the carburetor.
Be sure to check your fuel tank for water and dirt/debris, if there is water/debris then you need to clean your tank.
Check you fuel line condition after a while they will degrade and need replacment.
Check/Clean/Replace your fuel filter if you have one, normally they are located in the fuel tank of chainsaws.
When you remove your fuel lines from the carburetor be sure to make a drawing to how the lines are connected to the carburetor or take a pictue for later reference.
Normally the big line will be the line the fuel filter is connected to inside of the tank.
The smaller of the two lines is the return to the fuel tank from the carburetor after it is pumped thru the carburetor by the primer bulb.
Make sure you are using fresh fuel...and oil mix if your using a two cycle chainsaw with the oil to the right mixture and not too much oil as it can cause hard starting.
If the chainsaw is over a couple of years old, then I recommend that you buy and install a new carburetor repair kit,because the diaphragm will get hard and that will cause it to be hard to crank.
The diaphgram may look good and flexible, but it can be deceiving and not act as a fuel pump as it should because it has become too hard and will cause hard starting,start and run and shut off, etc.
When you clean your carburetor, I recommend that you use a laquer thinner type cleaner to clean and dissolve the laquer build-up in the float and needle jet passages.
Be sure to remove all plastic and rubber parts before using the laquer thinner because it can dissolve the plastic parts and render them unuseable.
Be sure to use COMPRESSED AIR to blow out all the fuel and air passages.The higher air pressure is needed to blow some of the trash/debris from the fuel or air passages.
Be careful when blowing out the passages, because there are sometimes small rubber type seats in the bottom of some of the passages.
Keep in mind that the float (if you have one) for the carburetor must be level when you go to reassemble the carburetor or follow the instructions you get with the carburetor kit, or you could also ask the parts man that you get your kit from.
When you clean your carburetor and remove the jet screws, you will first need to lightly seat the jet screws.
But before you lightly seat the jet screws count the number of turns it takes to seat the jet screws from their original position.
Be sure to mark the turns down on a piece of paper.
That way when you put the jets back in, you know to lightly seat them first and then turn them back out to their original position before you started.
Note:
The little spring inside of the carburetor goes under the float arm.
That is where your fuel inlet needle/float valve is located...on the arm at the end.
Normally there is a small indetion in the carburetor base and a small protrusion on the underneath of the float arm where the spring will be in the right postion for installation.
The spring will set in the indention and you will install the float arm with the needle/float valve and float rod into position over top of the spring,you will push down until it is in position and then you can tighten the screw that holds the float arm assembly in position.
Once you have your carburetor cleaned/rebuilt that should solve your problem.
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Posted on Sep 22, 2011

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Just replaced carb new spark plug and new gas line. Will start and run for 2 minutes . When you press the throttle it dies and won't start again. Same problem I had before replacing carb.


Rick if you are sure it is fuel related issue, does sound like it may be running out of fuel. Check the fuel filter in the gas tank and replace, also check the fuel tank cap as the vent in it may be plugged,which will cause this issue.
A similar issue to this, is when the muffler screen gets plugged with carbon on some models. Check the attached links,instruction and guides, Good luck
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Walbro WT891 carb on a Craftsman chainsaw. Carb is brand new, all fuel lines and fule filter replaced. I prime the carb with the little plunger, chainsaw starts up and runs out of fuel within 30 seconds....


Who connected these hoses? the normal routing for a machine with a primer is like this, the fuel hose from the tank with the filter on the end goes to the carb fuel inlet nozzel ( not to the primer ) nearest to the pump cover ( cover on carb held with one screw ) the pipe from the metering side of the carb connects to the shorter nozzel on the primer bulb ( suction side ), the longer nozzel on the primer ( pressure side ) connects to the pipe going back to the tank, just remember the primer pulls fuel from the carb,into the bulb, and pushes it back into the tank, it is not actually a primer it is a purge. because it is connected this way it is impossible to flood the engine no matter how many times the bulb is pressed.
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1 Answer

Where can i find the diagram for the fuel sysetem for a poulan


If the old lines are still attached, just replace one at a time. If everything is lying in a heap, then you will need to do a little sleuthing. Assuming the worst, begin with the line in the tank back end that holds the fuel filter (if it is old too--replace it). Be sure to use original rubber lines, not plastic. To connect the tank side of the line, you will need long hemostats or pliers to reach the tank fitting and the line must be long enough to allow the filter to be replaced from the opening. On the top side of the fitting, the line goes to the upper connection on the carburetor, but first run it to the primer bulb (which should be in good condition as well). Hook it either port, and attempt pumping fuel from the tank. If the correct port, it will draw fuel from the filter into the primer and expel it out the other port after about 3-6 pumps. If nothing, move the line to the other port and try pumping again. Once you get fuel to pump, then run a line from the open port into the tank for the return line. Remove the fuel line from the other port and attach it to the upper carburetor port. Run another line from the lower carburetor port over to the open primer port. Attempt pumping fuel again, this time pulling it through the carburetor into the primer bulb and expelling it back into the tank. All connections are just push-on and no cement required. Don't use more length than required for any section. Hope this helps!

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1 Answer

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If the saw has a primer bulb, then you require one line from it's output out to the tank return. Another line runs from the carburetor outlet to the primer inlet. Make sure that you use original rubber lines, not plastic replacements. The primer ports are found by trial and error--hook the filtered line directly to one primer port and leave the other port open. If the bulb is in good condition, and correctly connected to fuel, the bulb should fill with fuel after several pumps. If nothing, reverse the port connection at the primer--and pump test again. One of these two connections should allow pumping to occur. When you get pumping, install the tank return line to the empty primer port. Remove the filtered line from the primer and install on the carburetor. A new piece of line runs from the now empty primer port and connects to the output port on the carburetor. If the carburetor lines are correct, you should be able to pump fuel through the carburetor body and out to the primer bulb. If nothing happens, you may need to swap the carburetor lines, and you will likely need to service the carburetor. Hope this helps!

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Replaced my fuel lines on poulan 2050 today. The large diameter line is a return line from the primer to the tank. The smaller diameter line is the supply line from the tank to the carb. You need to cut this line and run a second piece of small diameter line from the card to the primer. I'm not sure if it makes a difference which of the two stems on the carb is the inlet or outlet line. I used the top stem as the inlet, and connected the bottom stem to the primer. My chainsaw started right up. So I either got lucky or maybe it doesn't matter.

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1 Answer

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