What is a Primer Bulb? Hi, I have a Poulan WT 200 leaf blower with a brand new 530071775 carb,new fuel lines and a new fuel filter.I can't get the primer bulb to fill with fuel.I've tried with the carb attached & unattached to the engine block.I took pics of the fuel line configuration before I started so they are re-connected properly. Get shopping advice from experts, friends and the community! Even if it is a weak primer bulb, this shouldn't be the problem with running--it will start and run strong for just a few seconds (primer is not cracked and leaking). Will let you know what I find. Primer bulbs on small engines take the place of a choke on the carb . When you pull on your mower's starter rope, the gas you pumped into the carb with the primer gives the mower engine juice to start. 10Pcs Screw On Primer Bulb For Prime Line Poulan Craftsman Weedeater W188-513. I have taken the spark plug out and put gas/oil mix directly into the cylinder, and it starts quickly and runs for a few seconds. Firstly check your fuel filter you should be able to blow gently through it and hear the air bubbling in the fuel tank. 10 Pack Primer Blubs Replace For WALBRO 188 Homelite Stihl Poulan Echo Shindaiwa. $7.59 $ 7. If the carb has a built in primer, the fuel line closest to the primer bulb is your fuel return back to the fuel tank while the other fuel line is your main fuel feed. The purge/primer bulb on my poulan chainsaw is damaged. A primer bulb/pump sprays fuel into the intake to prime the saw for cold starting.....usually in place of a choke. $3.29. 50Pcs Primer Bulb for Echo Husqvarna Poulan Weedeater Stihl Shindaiwa Zama Carb Homelite Ryobi OEM# 0057003 0057004 5.0 out of 5 stars 4 CDN$ 12.68 CDN$ 12 . Podoy 0057003 Primer Bulb for Poulan Crafstman Weedeater Chainsaw 530071835 530 071835 Walbro 188-512-1 Wt-23a Wyj-33 Wyj-86 Ryobi 791-683974 B 683974 Replace Stens 615-764. Find and apply today for the latest jobs in Vietnam. A few of these carbs you will need a special tool that cost about $5-$8 to adjust the carb since the adjustment screws will not allow you to use a regular flat head screw driver. If it's not working, then you either have a bad primer bulb, plugged fuel lines or in-tank filter, or plugging in the small ports of the carburetor on the fuel pump side. Routing Fuel lines on weedeater. All of the information for this primer bulb replacement video is applicable to the following brands: Echo, Zama, Stihl, Shindaiwa, Ryobi, Homelite, Green Machine A cracked bulb can cause an air leak, leaning out the saw. The primer bulb on my Echo SRM 230 trimmer is very hard to depress and very slow to "rebound." $7.74. The part number is 4130 350 6200. Each push of the bulb sprays a fine mist of gasoline along with air needed for starting. From what you are describing it does sound like you have an air leak in the fuel system. 68 Can you bypass the primer bulb on a weedeater. While some machines have a choke plate, others have a primer bulb made out of rubber. I'm thinking that all it will require will be a few extra pulls on the stater cord to prime the carb, … Looking at the unit (with the filter in front of you) the bulb is on yout left. The most common reasons for replacing the primer bulb are when the string trimmer leaks gas or won’t start. Most designs pull fuel through the carb and return it to the tank. Rated 5 out of 5 by Walker Texas Rancher from Replacement Purge Bulb Fit perfectly on my Husqvarna 450. 4.8 out of 5 stars 172. Folluw from the bulb to the carborator and you will see the spring with the shaft inside of it. I would suggest that you start at the fuel tank and work your way to the carburetor. it will help you have an overview and solid multi-faceted knowledge . It's job is not to pump gas but to purge the system of air. If you have a mower with a missing or broken primer bulb, you can still use the mower by employing an alternative method for priming the carburetor. $9.79. Free shipping . Buy a Primer Bulb [188-17-1] for your Lawn Equipment - This is a genuine OEM replacement part designed for use with Walbo carburetor. On the carburetor where your primer bulb is, unscrew the four screws that hold the top plate that is around the bulb and take the plate off. Other times, the bowl is empty. i know what a primer is for, but is there any 'trick' you can utilize to get it going without one? Clean the carburetor and primer bulb components. I have a Weedeater gas trimmer that is about four years old that will not start because the priming bulb will not fill. 4. 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