Fuel line routing. Never clear enough Explaination.
Gas tank has 2 Lines 1thick 1thin. Carb has 2 connections (Walbro) 1 Straight 1 Bent at 90 Degrees. Primer Bulp has 2 connects 1 in and 1 out. Now when all 3 lines disentegrate, The hit and miss connection method is UNCERTAIN at best. Especially when compounded by a dirty or partially clogged port. Runs, stalls PLEASE (My local repair shop couldn't help) Walbro says "To many models to list so here is a generic guide) And Poulan is NO HELP AT ALL> Please provide a diagram or a very specific explaination for EACH HOSE. I can't believe I can not get this info simply.\ I Sincerly THANK anyone, and I mean ANYONE who can relate to the frustration of such a simple yet, if incorrect...Frustrating because you are uncertain if further problems or just connected wrong.
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones). click here to download the app (for users in the US for now) and get all the help you need. Good luck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Usually the line with the filter on it that comes from the tank goes to carb. inlet first which is most likely close to the bottom side of the carb.nearest to the engine,then the outlet or return line on the carb.goes to the inlet side of the primer and the outlet side of the primer goes back to the tank. The primer draws fuel through the carb to the primer to the tank if its not? then correct the line connections until it does
Use new fuel line. There should be two things (besides fuel line) in the fuel tank. The small line has a (1) fuel filter attached and is routed to the lower outlet on the carb. This is the fuel supply line. Make sure there are a few inches of it inside the tank. (say enough to reach other side of tank). The larger line should have a (2) nylon connector inside the tank holding it. The connector stays right at the tank hole. That larger line goes to the closest outlet on the purge bulb. The other fitting on the purge bulb should have a larger line that connects to the upper fitting on the carb.
Feed enough length of fuel line thru tank holes to pull them out where cap is to put on the filter and nylon connector...then pull them back thru. WD-40 will aid in this procedure or any light oil.
The Walbro has two connections on it for the fuel line. My Walbro has one connection on the side of the idle screw and main fuel adjusting screw. This connection hooks up to the suction side of the primer bulb. Usually the shorter stem. (You actually **** fuel through the carb instead of pushing it through.) On the other side of the carb is the other hook up. It draws fuel from the tank. This line will connect to the side of the tank that has the filter. The other side of the tank is your return and it hooks to the other connection on the primer bulb. Usually the longer stem.
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
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.
Go to www.searspartsdirect.com and with your model number you should be able to find explode parts views of that trimmer. Filtered line to primer, primer to straight inlet on carb, angled outlet on carb back to tank. That might work. Not sure without part number.
I have Ryobi775r string trimmer with walbro WT526 carb. The fuel lines connect 3 parts eg. gas tank, bulb (mine is a separate bulb not part of carb.) and the carb. The bulb has 2 fittings- a short and a long one. The carb also has 2 fittings- one on top (vertcle) and one on the bottom (L shape). The gas tank has two holes in the bottom one for over flow line and the other for fuel inlet to the carb. This has a filter in the gas tank. Now the connections- connect the long fitting on bulb to the tank. this is the overflow. Connect the short fittin on bulb to the carb top (verticle) fitting. Connect the fuel line (with filter - it is in the tank) streight to the L fitting on the bottom of the carb. Make sure the fuel lines are of right diameter. Too big-and you will have leaks. You are done connecting the fuel lines. just for info. the bulb is there just to pull a vavcume in carb so that the fuel is sucked into the carb and is present there when you start the engine. Hope it helps. Good luck.
ok If you have a Walbro WT series carb "without" a built on primer bulb
here it is. First off if the fuel lines disintegrated you MUST
disassemble it and clean it out. The MOST infintesimle speck of gas
line trapped, can allow good prime and bad operation. OK? Don't be lazy
on this. Just be delicate removing the flaps gasket and diaphram. ZAMA
GND-12 Is the replacement Gasket and diaphram kit fot that carb. Use a
cleaner, compressed air or blow good thru it. OK Now...Primer bulb,
Carb, and Fuel tank, re connects: Smaller Diameter line comes from Gas
tank (Connect filter screen to this in tank) to the short Straight
brass carb connector. Primer bulb suction goes to the bent carb brass
connector. If small line brings fuel "in" this other line sucks it back
"Thru the primer bulb" and the blow side of the primer bulb sends it
back to the fuel tank! So...Small Line brings fuel "TO/IN" carb thru
short brass connect on carb. Other carb connect goes to bulb suction
"IN", Then primer bulb "Pressure OUT" goes thru the larger tube "back
to fuel tank". Trust me I know how frustrating a simple diagram is to
find online fo this set up. And if you have a carb problem on top of
the hook up uncertainty you got frustration. Not only was online help
hard to find (Mfg...etc NFG at all!) My local repairshop in BBrook NJ
could not tell me how!!! and thats no lie! Walbro has a "generic" carb
diagram but no "hook up info" specifically. Poulan don't list it
either. And these things routinly fall to pcs. all 3 of mine crumpled
together on yr. 3 of use.