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Where do the fuel lines go on a Walbro wt 891 carburetor

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Posted on Jan 02, 2017

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SOURCE: what is the walbro chain saw carburetor adjustment for a

There is no set adjustment on any chain saw. If it were that simple there would be no need for adjustments. The problem is that most equipment manufactured in the past 10 years can not be adjusted by the user. Carburetors are now equipped with either adjustment limiters which limit the adjustment to less than half a turn or with adjustment screws that require a special tool to make the adjustment. More than likely you will have to take it to an authorized dealer for those adjustments.

If you do have an adjustable carburetor, then gently close both needles and open each on 1 full turn. This should allow the engine to start and the final adjustments can be made at that point. If it still will not start then open each needle 1/8 to 1/4 turn and try again. If this still does not work then most likely your carburetor needs a good cleaning and a rebuild kit.

Posted on Sep 13, 2009

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Carburetor diagrams


I know of no diagram available for this. But if you have both lines out and visible you can just put them on the carb, fill the tank and prime it and see if fuel moves. If it does your done....if not....flip the lines and try again!

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Weed Eater PE550 711431, new primer bulb will not pop back after second second push.


FIXED- No start Weed Eater with the symptom of the primer bulb collapsed, not filling nor returning to pop out after pressed.

Worked in model WT-3100 with Walbro carburetor WT-583 and has to work in many others. It happened after winter hibernation, even when left with no fuel to prevent formation of fuel deposits.

FIRST, mark/scribe the carburetor fuel outlet that has the hose towards the primer purge bulb as 'OUT' and the fuel inlet coming from the fuel tank 'IN'
The problem was a fine mesh metal screen strainer blocked by contaminants, inserted at place shown as number '3' in figure 7 at
----> www.drystacked.com/Walbro%20Carburetor%20Theory%2027Jun2010.pdf
That fine mesh was removed by prying its edges around with a sewing needle held by pliers.
It you cannot see light trough it holding it against a lamp, is blocked even if looks clean.
Removed, discarded, reassembled and started. Later ordered the part or kit but was able to use the machine immediately.

Writing this as am tired of seeing responses like 'may be this' or 'try that' or 'perhaps the other' by guessers.

Aug 07, 2013 | Poulan Garden

1 Answer

Walbro wt-141 changeover to wt-629


If the carb has two connections then it is designed to work with a primer bulb, the fuel inlet will be nearest to the pump cover, the alluminium cover held with a single central screw, you can either get the correct carb for the machine or use a short rubber tube with a blank in the end ti close it off.

Feb 02, 2013 | Poulan Weedeater Carburetor - Walbro...

1 Answer

I have a walbro carberator that squits gas out of a little hole on the side near the top of the carb why?at the top why?


Probably the needle valve is sticking, letting the float bowl over flow. Remove the float bowl, and blow very low air pressure (less than 5 psi) through the fuel line. lift the float and see if the air blows past the needle and seat. If it does check the needle and seat. Sometimes a deteriorated fuel line will cause little bits of rubber to keep the needle valvefrom closing. If raising the float does shut off the air flow remove the float and check it.Brass floats on old carburetors can develop pin holes allowing fuel to enter the float causing it to drop. This keeps the float valve open. Some non metalic floats can become fuel soaking causing the same problem.

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1 Answer

Which fuel line "port/inlet" on the Walbro wt-380 goes to the fuel tank? It's on a Craftsman 25cc Gas "Weed Wacker" Line Trimmer purchased in 2002. It has Walbro WT-380 carburetor with external primer...


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

Jun 25, 2010 | Craftsman 25cc Gas Line Trimmer

1 Answer

Fuel lines rotted off of my McCulloch 4600 chain saw


Go to: http://www.drystacked.com for a 12 page article on Walbro brand carburetor theory and troubleshooting. Hope this helps!

May 18, 2010 | McCulloch Garden

1 Answer

How to adjust the fuel flow in a Walbro carburetor


Check the fuel lines for cracks/breaks. If they are o.k., then:

You willneed to disassemble the carburetor and spray with carb.cleaner.Make surethe small screen is free of debris. (Should be able to see daylightthrough it.)

Use a Den Tek Brush, (http://www.drugstore.com/products/prod.asp?pid=165357&catid=1152), to clean the small portals in carb. These portals can become blocked. Reassemble and start.

If the carb. parts are more than 4 years old, you may have to replace them.

If you need further assistance on:
1. Fuel line replacement or
2. Carburetor kit replacement

Just let me know.

Jim

Dec 01, 2009 | McCulloch Garden

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