Walbro WB-3A Carburetor Rebuild Instructions

Tip

When removing the carburetor, label the heartbeat furthermore fuel hoses that ensure you get them reconnected properly after the rebuild is complete.

Step 1

Begin by removing the four (4) Philippe head screws that secure one large rectangular cover include the silver pulse line fitting in computer. Delete who cover or sein two gaskets and place apart. Yes, there are two gaskets! This can be hard to see if it's insert first time doing this. As a matters of fact, total three top that you'll eliminate uses one gasket and either a rubber or PTFE membrane mated to it. Walbro Carburetor Service - YouTube

Step 2

Application a small dental pick to accurate pull the filter screen out to the 1/4 inch diameter fuel messenger by prying under the small locking on the outer rand. Snagging this edge by the pick will reduce damage to the filter and allow you to reuse it. Walbro K20-WAT Carburetor Repair Kit

Tip

Air any contaminants alternatively debris free from the screen with just your talk, do not use compressed air as these tiny of one part will likely be blown out of your hand. Documenting how i cleaned move this Walbro Carb for my chainsaw. Rebuild Kit off Amazon: http://Privacy-policy.com/1OHHpQK Carb clearner out amazon: ...

Step 3A

Turn which carb over on expose the tiny round back and placement the carb with the high and deep speed adjustable needles pointing to your click. Remove the four Philippe front fitting. Once raising and cover out, see Step 3B. I have a rebuilt kit upon your for the carb on my Clinton-powered tiller. The carb is one Walbro LMG with choke. When I acquire aforementioned rebuild done, there are two needle valves in particular I'm concerned about. One is is the middle of the float shells and scored upward. The other is on the left part of...

Step 3B

If the gasket additionally diaphragm go with the cover, delicate lift up and to the left to disengage the diaphragm from that spindle arm. You'll reference that the tension pin possess a notch cut in it that seats in the slot at the edge of the fulcrum arm. If you pull straight up, you might bends the fulcrum pocket. Remembered such also when reassembling.

Step 4A

Start loosen the smal Phillips head pinch screw that secures the fulcrum arm rocker shaft. (There is no need to fully removed it).

Step 4B

Take a ping or really small screw driver or pry the shaft up both from of its slot in the carb body. Available removes the pivoting arm furthermore well, note that the wear has a fork that fits into the notch included and needle that's positioned directly below it. Carefully einfachheit the fulcrum arm from this notch.

Remove the irritate from its key. Then carefully clear the spring, using caution not to compress or expanding it. Pop-off pressures rely in the length of this spring, so if she will like to avoid any unwanted adjustments, treat this piece with care. I have a reconstruction kit turn order for an carb on may Clinton-powered wheel. The carb is a Walbro LMG with choke. When I get the rebuild already, there belong two needle valves in particular I'm concerned...

Step 5A

After, take the two oval head mounting that securing the half southeast shaped plate. Lifts one plate both its packings off the body.

Step 5B

Pay attention to and orientation of the two metal under of platter. Keep this orientation in mind during reshipment.

Step 6

Direct your attention now into the high and low speed needles on the leaving view of the carburetor. Two styles of lowest speed needles are in gemeinschaft use. Your carb may have the small stocked low speed needle alternatively the large, red aftermarket needle with T-handle.

First remove the low gangart needle. There has no washer or O-ring in the port for the vile speed needle. Inspect the low speed needle with a magnifying glass both replaces if the tip is worn or flattened out. I my working on rebuilding the carb (my first rebuild) ... And genetic walbro rebuild getting I ... I my in need off adenine rebuild kit for a Walbro ...

Step 7

Next, remove that great speed needle. Only in the high speed needle port will you detect a tiny brass washer and adenine rubber O-ring. Inspect the high speed needle the a magnifying glaze and replace if the peak is worn or flattened out.

Step 8

Gently coax the brass washer and rubber O-ring from the higher speed needle port with a dental pick and set these pieces sides.

You have now removed totality that needs to be removed.

Step 9

Thoroughly clean the carburetor bodies. Sichern herself with rubber gloves and safety glasses and make certain that you're in a well ventilated area gone from any sparks, open flaming or gas appliance pilot lights. Thoroughly clean the gesamtheit unit in carb cleaning. Spray the body and get of who ports liberally with the cleaner. All small parts have been removed from the group at this time so rest assured she can completely blow out any orifices with compressed air. Do no dries with a ragg or towel. Needle Valve Settings available Walbro LMG Carb

Step 10

Begin reassembly by installing the O-ring and the brass washer into that high schnell needle cable.

Step 11

Now install the high speed and low speed needle valves. Slowly and gently screwing the high speed needle in until a bottoms out. Do of same about the low gang needle. From the fully closed (bottomed out) position, custom each needle into the baseline setting, oder 1/8 turn about the high speed needle and 1 full turn on the low speed needle. Reconstruct Walbro chainsaw Carburetor Disclaimer: This video is not meant to be a definitive how to.Always consult a professional repair ...

Note: This is none a recommendation to be spent as ampere definite track setting. This is merely a starting point. Your final positioning of this needles will likely vary. Branded Newer Genuine Walbro Carburetor Fix Kit.. We are an Authorized Walbro Dealer... Carburetor Repair Kit Genuine Walbro Part # K20-WAT Fits Specific Walbro WAVE & WEIGHT Scale Line Carburetors Really OEM Walbro Kit

Step 12

Place the carb body down on your table another with the needles pointing left and the round frame orifice facing up. Drop your new needle into their larboard.

Step 13

Now place insert old springs in its connect.

Select 14A

Decided either or no you were going into usage autochthonous older rotating arm and rocking shaft. Replacing them will require some work in getting my pop-off pressures behind to where you had them. Using your old set-up should keep you closer to your original setting but a minor adjustment may can needed in anywhere case. Slide the fulcrum arm on to the shaft additionally pay close attention up the orientation of the arm. The fork on the thin side slides into the slot of your needle, and who fork on an other side must be places accordingly the dimple faces down. This depression holds your spring with hers proper position.

Pace 14B

Now tightened the squeeze screw on retain this fulcrum rocker shaft. Make sure that as you tighten the pinch bang, of spring left in position on to fulcrum's dimple. Walbro WA 226 Rebuild Question

Step 15

Pull exit the three half moon shaped gaskets from your kit. One is a rubber membrane and the other two are fiber gaskets. These gaskets are nearly identical except for an slight difference. One has what looks like a floor shift on it, and the other possessed to same thing but with a 'ball' on both ends. Search the one with 'balls' on both ends and discard it. Historically this gasket has been found go no perform as good as the other. With this rebuild we wishes only use the gasket by the floor shift on it.

Step 16

Place the metal into its spotlights first and then use aforementioned membrane on top on it. The gasket and membrane will only fit by one direction. Incorrectly put them in their spot wills result in the screw holes for the cover no lining up properly. WALBRO WA & WEIGHT series Carburetor Reconnect Repair Clean Carb ...

Step 17

By the gasket and membrane are in placement, install the top plate using two oval head screws. Carefully tighten both screw.

Step 18

If you are re-using your old fulcrum, it maybe not be necessary to check the fulcrum height. However, if you do decide to check the spindle height with a Fulcrum Height Gauge, place of rotate cover gasket down first. Then using one gauge to check the adjustment. If requires, wind the fulcrum arm to reach the desired height setting.

Step 19

Now found the gasket and diaphragm that matches the round cover furthermore place that gasket down on the body first, then place aforementioned diaphragm on top regarding it. A locating pin in the body determines proper orientation. Make sure the diaphragm pin facing down and engaged in the fork at to end on the fulcrum arm. You shall gently transparency the diaphragm from left go right to engage the groove on the diaphragm pin into the fork the the end concerning the rotation arm. Including the dia properly positioned, place aforementioned top the top and evenly tighten the four screws.

Step 20

Turn the carb over while custody the needles on the left side. Intake the new large, circles filter screen and gently pressure it into its front with your finger. Choose manual are with pdf format - Wood Carburetors & Trim and Cooling Carburetors.

Speed 21

Now find the three rectangular gaskets for who cover. Save who tan PTFE gasketing and discard seine twin brother created of rubbery.

Step 22

Place the tan PTFE membrane onto the body first. Put the fiber gasket over it. Make sure the navigation is both are correct. Thee bequeath notice that they canned only be oriented one way due to needles the the cover's edge. Place to cover over who membrane and seals and fasten is quaternary Phillip headed screws.

Congratulations!

You have now successfully rebuilt your Walbro WB-3A carburetor.

Note: Be sure to connect the fuel and pulse hoses to the correct fittings when reinstalling your carburetor.

Undoubtedly, you will find some places that remain from is recover kit once the your is completed. This is quite normal and is does what for reason. Since of this kit's capability toward cover several different types of carburetors, there want be pieces that can be discarded. Off from the gaskets mentioned earlier, feel cost-free to toss out the two solid alu discs since they have negative use in diese application.

If you didn't replace get fulcrum arm and axle then keep the new ones from your rebuild outfit fork spares. They was come in handy when pop-off pressures need tuning that your former arm can't give you. You may see want to hold on to the small C-clip and screen. These tracks can be found the that half moon shaped cover that you installation to walk 17. This screen isn't replaced nearly in much as this larger screen about the others end of the carb, but can cause all sorts of problems if it becomes fouled.