3. NOTE: Do not stretch, bend or compress primer spring. Especially in the case of primer bulbs located on the carburetor, you can save yourself time on future repairs by replacing the bulb when dismantling and cleaning the carburetor anyway. Remount the carburetor. Unscrew the two carburetor mount screws. The same goes for fuel lines. You will be able to tell if the bulb is cracked, if fuel leaks out of it when it is depressed. Pry retainer out and remove bulb from primer seat groove. It's probable that seeing the steps for replacing the bulb in one design will help you to replace the bulb in another kind of engine. Replacing primer bulbs in small engines is one of the most common types of tool repairs, and this article explains professional steps for primer bulb replacement in two engine design types. Receive money-saving advice and special discounts! Install the new primer bulb. Once away from the carburetor, the old primer bulb should easily pop right out of the mount plate. Install the new primer bulb and reconnect any fuel lines as necessary. 1. Remove the fuel lines from the old primer bulb with a screwdriver. Try turning the engine (if possible) so that gravity is on your side, and then carefully use a flat head screwdriver to press the mount tabs inside the mount ring. 2. Clamp the return fuel line. Remove the fuel lines from the old primer bulb with a screwdriver. Then entire assembly can then be attached to the engine. [Back to top] Remote Primer Bulb Repair Steps. Be careful to install new fuel lines on the engine … https://www.ereplacementparts.com/article/4262/How_to_Replace_a_Primer_Bulb.html. 7. Primer bulbs are usually positioned on the lawn mower one of two ways. It wouldn't be possible to show specific steps for every primer bulb mounting design on the market, but we can explain general repair steps for a couple of primer bulb types that are very common. Once you've gained access to the bulb's housing, remove the screws that hold it in place. Reviewing these steps will likely help with primer bulb replacements on other engines. A pair of needle nose pliers works best for this. Replace the air filter and cover. Did you find this story helpful? Clamping the fuel line leading out of the primer bulb will prevent excess fuel leaking during the repair. They're either directly on the carburetor, or placed at a distance from the carburetor and connected to it with rubber tubing. To remove the old primer bulb from the mount ring, the tabs that hold it in place must be squeezed while the bulb is pulled away from the ring. This primer bulb replacement is now complete. We use two different trimmers for our demonstration examples below, a Shindaiwa T242 Trimmer and a McCulloch trimmer. 5. Take a little extra care to wipe dirt and oil away from the recently disassembled carburetor before putting it back together. Used a socket to secure the bulb onto the carburetor. Step 2. Thanks for watching. Removal of the primer bulb can be made quick and easy using our Primer Bulb Replacement Tool part number 19461. Another cause of the primer's filling problem could be the bulb itself. Small perforations on the rubber could inject enough air into the fuel system to make the suction too weak. [Back to top] Primer bulb was cracked. Your cultivator’s primer bulb works as a vacuum to draw fuel into the carburetor. Clean the carburetor and primer bulb components. Be prepared for a little gas to leak out after the fourth screw is released. Remove the old primer bulb. The entire carburetor assembly will pull away from the trimmer after the two mount screws are free. Install the new primer bulb. Check the primer bulb to make sure it is working. I backed said screws out enough to see a disconnected tube staring right at me. 4. Then the mount screws just need to be tightened down again. What we're about. See below—-v. well, this is hosed. In only takes a few minutes to replace a primer bulb, especially after you're used to your engine's primer mount design. Install the new primer bulb. . For the T242, the primer bulb can be pressed into place in the mount plate from which the old bulb came. Primer Bulb on Carburetor Repair Steps. 7 Insert a new primer bulb clip over a new primer … 5. The Shindaiwa T242 has four screws that mount the primer bulb plate to the carburetor. Inspect the plastic bulb for cracks, damage and signs of yellowing. Press the fuel lines onto the new primer bulb by hand, and then unclamp the return line. 640303 tecumseh no. Most remote-mount primer bulb designs use a snap and ring system like the trimmer in our example. 3. When normal flow is … The steps we explain in this example repair will help with remote-mount bulb mount replacements on other engine designs. After getting gas on your hands a few times through a cracked bulb, a small repair like this one can make you feel like you have a whole new engine. Remove the old primer bulb. Fuel lines become brittle over time and can crack or break. The engine has deposits from old fuel being left inside. Then the mount screws just need to be tightened down again. my primer bulb for my Toro self propelled mower has a crack and will not prime my engine. Step 3. Replace a fuel line that's brittle or damaged. We use two different trimmers for our demonstration examples below, a Shindaiwa T242 Trimmer and a McCulloch trimmer. 2. Below are the steps for replacing a primer bulb on a. Then entire assembly can then be attached to the engine. Pull the choke plate away from the carburetor and set it aside. Start your primer bulb repair by entering your tool's model number in the Search by Model Number field at the top of the page. This primer bulb replacement is now complete. Press until both tabs re-seated in locking slots. Since a fuel line replacement requires a parts order and work in that part of the engine, it just makes sense to order a primer bulb at the same time to save money on shipping. Sometimes the tabs can be a little too tight to snap in by hand. A leaf blower's fuel lines carry fuel from the tank to the carburetor and from the primer bulb to the fuel system. Primer Bulb on Carburetor Repair Steps 3. Replace the fuel primer if it shows any sign of external damage. Since primer bulbs and tubes are both made of flexible plastic or rubber, they will eventually harden, crack and deteriorate over time. My edger is a Craftsman 15" curved shaft 2-cycle line trimmer with model no: 316.790101 Spray carburetor cleaner on a cotton swab and wipe out any debris inside of the primer bulb housing. Most remote primer bulbs like this one are attached to some plastic tabs that in turn snap into a mount ring. A primer bulb that's lost its suppleness doesn't respond as a new one does. If it's been more than a season or two since your tool's engine got a new primer bulb, you'll thank yourself later for replacing it pretty much any time you have a good excuse. 7. The first steps toward accessing the carburetor are to remove the air cleaner cover and the air filter. Primer bulbs that have cracks or tears in them need replacing to start a gas leaf blower. Sure enough, it was the rubber tube that feeds the primer bulb. 5. 3. 2. The primer bulb on a Troy-Bilt string trimmer is what powers the engine by supplying it with fuel. We list and explain the steps for replacing two types of primer bulbs below, designs where the primer bulb mounts directly on the engine's carburetor, and designs where the primer bulb mounts remotely from the carb. Designed to replace air in the fuel lines and carburetor with gasoline when you depress the button several times, a primer bulb provides a crucial service that makes starting the engine easier. This primer bulb replacement is now complete. Even though small differences will exist between each specific engine's primer bulb design, primer bulb repairs share similar qualities. Sometimes the tabs can be a little too tight to snap in by hand. The first steps toward accessing the carburetor are to remove the air cleaner cover and the air filter. Many homeowners may not realize it, but primer bulbs are important for getting an engine cold started. I've already obtained the new parts for the primer bulb, but I can't figure out how to remove the old bulb and tubing from the plastic encasing. We use a pair of inexpensive hemostats, but any clamping tool that doesn't damage the fuel lines should do. Locate the primer bulb. This trimmer was put in the garage for years with a busted primer bulb. Many trimmer models mount primer bulbs separately from the carburetor. Press the fuel lines onto the new primer bulb by hand, and then unclamp the return line. Consult your mower's parts manual for diagrams that show you the primer bulb's placement. Many people tend not to use it, but when it comes time and the machine doesn't start, then they it's important to have a primer bulb ready. To remove the old primer bulb, the trimmer's carburetor must be accessed. Because the primer bulb (during normal operation) will fill up with fuel, a cracked primer bulb will leak gas. A broken or cracked primer bulb will need to be replaced to solve this issue. Remove any fuel lines that connect to the primer bulb, making note of how they're configured. Insert the two carburetor mount screws through the carburetor choke plate and the carburetor.
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