The check valve in the primer isnt good if you dont. A primer bulb should be in pristine condition to work flawlessly. Squirt the eyedropper full of gas into the fuel bowl vent and repeat the procedure at least 10 times. These parts are on the carburetor. Otherwise, pressing and releasing the primer bulb will not create the air pressure and resulting suction to pull fuel from the tank into the carburetor. Mastering the Art of Backing a Boat Trailer: Tips, Tricks and Techniques for Newbies and Intermediates, Boating for Fitness: How to Stay Active on the Water, Waverunner Safety: How to Ride Responsibly and Avoid Accidents, Tiara Yachts Whitney Vishey Inducted into 2023 Boating Industry 40 Under 40 Class. Since the primary function of the primer bulb is to regulate air pressure and suction, it cannot have any leaks, cracks, clogging, or structural issues that make the part ineffective. However, if the primer bulb, its seal, and plate are fine, you are looking at one of the other causes and therefore fixes explained here. 2. Inspect the connection of the primer bulb line going into the carburetor. Exercise caution so that you do not damage the hoses or fuel lines. If the bulb looks damaged, it will need to be replaced with a new one before the engine will run properly again. Thus, the filter will not allow fuel to flow out of the gas tank as it normally does. The primer squeeze bulb and hose assembly should be replaced every two years by most seasoned boaters. There are some things that can cause air bubbles in the gas line on a blower. Inspect the carburetor and clean all its: Inspect the diaphragms and remove grime or residual buildup if you see any. Continue with Recommended Cookies. 2023 BoatingWorld LLC. To be updated with all the latest news, offers and special announcements. There is enough gas in the engine to start with the help of this suction. The engine stalls frequently. The only exception is worn-out or damaged hoses. Under the metal flange is a rubber gasket with 2 small valves as part of it. ALL RIGHTS RESERVED! Fit the fuel return line snugly to the primer bulb. Also, check the other hole that allows air and fuel to flow into the primer bulb. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". Inspect the primer line for the primer pump and check for any cracks or debris. Since the filter is meant to remove debris from fuel that will be sanctioned by the primer bulb into the carburetor. Fresh fuel is drawn into the intake fuel line when a vacuum is created after release. However, a leak may be a tad tough to detect. Make sure it is properly connected and sealed and that there are no leaks. We and our partners use cookies to Store and/or access information on a device. However, some modern chainsaws may have automatic primer bulbs that do not require manual squeezing. What Is The Difference Between A Kayak And A Canoe. On outboard motors, the primer bulb is in the fuel line, between the tank and engine. To use the fuel bulb, first make sure that the engines stop switch is in the off position.Then, unscrew the cap on the fuel line and connect the hose to the barb fitting. When a primer bulb isnt priming, it could be because its cracked, broken, or damaged and needs replacing. Such models dont have the primer bulb connected to the return fuel line. There is no way that much pressure is put on a return line if there is a problem with it. Thus, take apart the carburetor to check if all these vital components are working alright. The primer bulb helps to add the right amount of fuel, reducing the risk of flooding. You must make sure that you have the right primer bulb for your engine and carburetor. The first thing you should do is check the valves and gaskets. As an Amazon Associate, We may earn from qualifying purchases. Finally, check the carburetor to see if it is dirty or has debris in it.If the carburetor is dirty, it will prevent fuel from flowing through and priming the bulb. Technically, priming is the process of providing the carburetor with sufficient gas so that the fuel and air can mix and be ready to combust when you start the engine. Can You Put Disc Brakes On A Boat Trailer? How It Works. This cookie is set by GDPR Cookie Consent plugin. In order to protect them from damage, primer bulbs are usually placed in the air filter housing. There is a longterm. It works by creating a vacuum that draws fresh fuel into the intake fuel line. The return line is from the long post on the back of the primer bulb. When you push down on the primer bulb, the valve going to the gas tank is closed and gas is pushed through the other valve into . How To Install A Purge / Primer Bulb Properly. Test if your primer bulb is working by pressing it and observing the compression and reversion. Disclaimer: The information provided on this website is intended for educational purposes only and should not be used as a substitute for professional advice, judgment, or personal experience. Another symptom of a failing primer bulb is that it becomes increasingly difficult to press down when youre trying to start the engine. This cookie is set by GDPR Cookie Consent plugin. This could be caused by a crack in the fuel lines, primer bulb, missing or damaged gasket, or something else. Inspect all the gaskets and replace broken rings or seals. When the bulb is squeezed, it forces fuel through the valve and into the engine. On many small engines, this involves pulling the starter rope, although some small engines have an electric starter. A bad primer bulb can make it difficult to start your boat engine, and can also lead to fuel leakage. When the fuel system is restricted, the primer bulb may not be able to draw fuel into the carburetor, causing it to fail to prime. By depressing the bulb, it forces air out of the line and creates a vacuum. The primer bulb goes after the filter for a reason. Fuel leaks A damaged or cracked primer bulb can cause fuel to leak from the carburetor area. Many small engines use a primer bulb to make starting easier. The carburetor on your tool may have three or more valves, depending on its type and design. 2. If the primer bulb is not working, you may need to troubleshoot it. A snap-in primer bulb is a type of primer bulb that is designed to be easily attached and detached from the chainsaws fuel tank. Detach the fuel lines from the gas tank, carburetor, and primer bulb. Primer bulbs are the same regardless of whether they are universal or not. However, you may have a broken valve or more. If you see some fuel, the primer bulb is working fine, but the gas is not flowing into the carburetor due to some blockage or broken part. Next, check the fuel lines for any blockages. Its like snapping together two puzzle pieces! Here you will find a vast library of easy do it yourself repair videos for all types of small engine equipment like chainsaws, weed eaters, hedge trimmers, brush cutters, leaf blowers, lawn mowers, pressure washers, generators, riding lawn mowers and so much more. We work hard to protect your security and privacy. A primer bulb, on the other hand, is a rubber bulb that you squeeze to add fuel to the carburetor before you start ignition. Pressing the primer bulb creates a vacuum that sucks gas from the fuel tank through the fuel lines and into the carburetor. Then, inspect the valves, gaskets, diaphragms, and ports to ensure they are alright. For more videos like this, check out:Purge Bulb Upgrades https://youtu.be/2bmdKyRFnjUSpiral diaphragm carb upgrade kits https://youtu.be/y4VEfkIU3ZMHow to Adjust or Tune the Carburetor on a Leaf Blower https://youtu.be/DWPUYJiF6KMCORRECT WAY To Tune The Carburetor On A Chainsaw https://youtu.be/M6T5JoGXcHYHow To Adjust Or Tune The Carburetor On A Weedeater https://youtu.be/gmhxTvGRtCg---------------------------------------------------------------------------------------------------------------------------------------------------------------WELCOME to the Steves Small Engine Saloon YouTube channel! Most 4 stroke outboards have a diaphragm-type primer bulb.This means that when you push down on the primer bulb, it collapses and forces fuel through a small hole into the engine. Without a primer bulb, the carburetor may not receive the required fuel to run the engine, leading to poor performance and potentially causing damage to the engine. 2. A quick video tutorial on HOW TO Replace a Primer Bulb / Button on a 5 Horsepower Briggs and Stratton Engine. Look for leakage and anything clogging the primer bulb, fuel lines & filter, and carburetor. the no hole primer is used when the primer is part of the carb itself. Insert the new primer. This cookie is set by GDPR Cookie Consent plugin. He will continue with his uncle Richard to keep the audience engaged with value-added insights on chainsaws for many years to come. Also, many primer bulbs are not durable because of the flexible material quality. Empty the gas tank, and be prepared for some spills if there is fuel in the carburetor and hoses. Images in this video are Created and Copyrighted to Craig Kirkman of The Repair Specialist Channel and 'no' reproduction of this content is granted. Hunker may earn compensation through affiliate links in this story. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. Reply More posts you may like. ulitepilot aka Zombie Dave 6.95K subscribers Subscribe 8.8K views 5 years ago For a very simple design it's. The most common cause is a problem with the fuel system, such as a clogged fuel filter or a blocked fuel line. When you press the primer bulb, it creates a vacuum that draws fuel from the fuel tank through the fuel line and into the carburetor. There are a couple 3 different sizes of primer/purge bulbs, but the right size of any brand/make will work. This is caused by a loss of suction in the system, which prevents fuel from being drawn into the carburetor when you press on the primer bulb. What causes the primer bulb, not to prime? It usually only takes a few pumps. I have been a small engine mechanic for over 30 years and my videos are absolutely loaded with tips and tricks that I have learned and want to pass on to YOU. Any stuck valves lead to a primer bulb not priming. Why won't my primer bulb fills with gas? When released a vacuum is created and fresh fuel is drawn into the intake fuel line. No information contained in this video shall create any express or implied warranty or guarantee of any kind. If your Mercury FourStroke outboard is 75hp or greater, the onboard electric fuel pump will prime the fuel . Similar procedure for MOST Briggs and Stra Show more Show more We reimagined cable.. CraigFor some FREE Printable Download help Leaflets: https://www.therepairspecialistonline.com/These downloads are from my very own website and are absolutely Free. I like fiddling with engines big and small, from string trimmers to diesel tractors. Thus, the primer bulb is a purge bulb, too. The engine may run out of fuel or it may die. The Pros and Cons. She is the only person who believes in me, and supports me, 100% in all of my endeavours. Web the primer bulb on small engines is a small plastic piece that, when pressed down, draws fuel from the fuel reservoir and into the carburetor. If there are any cracks or holes in the rubberized material, then you should replace it as soon as possible. As a result, you may notice that the primer bulb fills with gas when you press it. Like the valves and hoses, the fuel filter in your tools gas tank may have gunk buildup. All rights reserved. On lawnmowers, the manufacturer often locates the primer bulb between the fuel tank and air filter. Then, pull the metal plate away and clean the air bulb seat. Clean this hole to ensure there is no blockage. This video shows you how to easily install, repair or fix the primer or purge bulb properly and shows how the whole purge system works! The causes and fixes of a primer bulb failing to prime often depend on its location in your tool. A new primer bulb If you find a blockage, clear it out and see if that fixes the problem.Finally, if all else fails, you may need to replace the primer bulb itself. Before you loosen anything, you can lift the squeeze bulb and engine pump together. A carburetor has many tiny but vital components, a few of which may prevent your primer bulb from priming. I have to be careful in recommending products because I have my name and credibility at stake. As the name suggests, it screws into the carburetors body or the fuel line between the tank and the carburetor. The air/fuel mixture going into the engine can be affected by a hole in the primer bulb. Insert primer bulb into retainer and moisten inside diameter of primer bulb. 5. If youve ever wondered whether a 4 stroke outboard needs a primer bulb, the answer is yes! When the bulb is pressed and released, it creates a vacuum that draws fuel into the intake line, which then deposits it into the carburetor. It's often located just behind the starting handle, and you should press it 10 times when cold-starting the trimmer. I'm no mechanic but I'm hoping that the troubleshooting guides on this site will save you a lot of time and headaches when it comes to fixing engines. This helps to prime the engine, which means that it will start more quickly and run more efficiently. If the primer bulb isn't working, the engine won't start. Let the carburetor air dry before reassembling & testing the primer bulb (source). Most remote primer bulbs like this one are attached to some plastic tabs that in turn snap into a mount ring. Detach the fuel intake line from the primer bulb and the return hose from the carburetor. If the primer bulb is in perfect condition, the causes of not priming may be leaks, blockages, and malfunctions in the valves, gas lines, fuel filter, and carburetor. There is enough gas in the engine to start with the help of this suction. A screwdriver A pair of pliers The best way to find the correct part is to check the owner's manual that came with your lawnmower engine. Replace a broken or malfunctioning valve. The use of fresh fuel in the system and the addition of a fuel stabilizer help to reduce this type of deterioration. How to Prime the Mower in The Absence of the Primer Bulb. Clogged Primer Bulb and Line The primer is a small plastic bulb with an attached line that feeds the string trimmer fuel. Outboard primer bulbs Dangar Marine 231K subscribers Subscribe 279K views 6 years ago In this video we look at why holding an outboard primer bulb vertically makes it work better. Package Contents: 1*Primer Bulb. Other reasons can include a faulty valve or gasket, or a clogged fuel line.If your boat primer bulb goes flat, there are a few things you can do to fix it. I guarantee you that these items are the sorts of things I use on a daily basis so I know they are good. The primer bulb has air bubbles in it. Video of the Day Step 2 Check the ring around the primer bulb to see if it is cracked in any way. You may have this problem if you store a tool with a loaded gas tank. So the main difference between purge and primer bulbs is what they do. If you have already checked the fuel lines as detailed in the second step of this guide, you are already aware of whether the fuel lines are blocked or not. Next, check to see if the primer bulb is firm. Buy Dalom 309376002 Carburetor for Ryobi RY3714 RY3716 Gas Chainsaw Parts with Gasket Primer Bulb Fuel Filter Line Spark Plug: Replacement Parts - Amazon.com FREE DELIVERY possible on eligible purchases Skip to main content . What is that thing? Choosing the 'best' car bulb really comes down to personal preference and what kind of bulbs your car uses. Fuels with alcohol blends tend to accelerate this type of deterioration. Necessary cookies are absolutely essential for the website to function properly. The primer bulb is released after being pressed. The engine then draws in this fuel and uses it to run. The engine may flood when too much fuel is present in the carburetor. A leaking or damaged primer bulb that is fastened directly onto the tools carburetor is not a serious problem. Pump the bulb until it feels firm, then screw on the cap tightly.Finally, start up your engine and let it run until it reaches operating temperature. First, look for the air cleaner then remove its cap. If a primer bulb is fastened directly onto the carburetor, the compression and reversion force fuel into the device. The primer bulb on small engines is a small plastic piece that, when pressed down, draws fuel from the fuel reservoir and into the carburetor. 4. The fuel is then deposited into the carburetor, preparing it to make the perfect fuel-air mixture. Should the primer bulb stay hard? A primer bulb will not compress and revert flawlessly if: Also, you can do other tests to check if the primer bulb is working, but another component is not. Patrick McMann works as a hardcore tester and reviewer for Chainsaw Guru. To the point, fantasy baseball is a game where people act as general managers (and/or owners, if you will) of virtual baseball teams. Want to learn more? Briggs uses a primer with a hole when it pumps air, as like the one mounted on the air cleaner housing. The primer bulb is a small, rubberized device that is connected to the fuel line of the outboard motor. Then, press and release the primer button several times until you see fuel squirting from the carburetor vents or intake manifold. It does not store any personal data. They are primarily found in professional arborist and miller chainsaws because of their high-end durability and long life. Here are some signs that your primer bulb may be going bad:1. You may have one or more problems preventing the primer bulb from priming. Besides, a primer bulb will suffer wear and tear due to frequent use, like all such parts. When the bulb is firm, the line is charged and you can start the engine. If there are any blockages present, then they should be cleared before attempting to start your outboard motor. The bulb is typically made of rubber or plastic and has a one-way valve that allows air to enter but not exit. Also, you may opt for ultrasonic cleaning and compressed air. This cookie is set by GDPR Cookie Consent plugin. To do this, simply remove the bulb from its housing and inspect it for cracks, leaks or other damage. eManualOnline provides descriptive, affordable, and convenient service and repair manuals for cars, trucks, motorcycles, and more. Download one today. Air is pumped into the float bowl when the primer is pressed. Patrick also specializes in offering solutions to the problems that homeowners may face while operating their tools. * VISUALLY EXPLAINED by Craig Kirkman, a renowned you tube educator of these systems. The primer bulb is not able to be bypassed. The carburetors metering unit or chamber should be flooded as you prime the tool for the fuel to flow into the primer bulb. The primer bulb on an outboard motor is responsible for pumping fuel from the tank to the carburetor, and if its not working properly, the engine wont get the gas it needs to run. Also, you may use an aerosol cleaner after getting rid of the gunk. The primer bulb does not pressurize the gas tank. This is not only a fire hazard, but can also lead to expensive repairs if left unchecked.3. Thus, inspect the usual suspects sequentially, detect the causal issues, and opt for the appropriate fixes. Get a new primer bulb to replace the damaged one. Analytical cookies are used to understand how visitors interact with the website. She is my Rock! If you notice that your boats primer bulb isnt working properly, there are a few potential causes and symptoms to look out for. Additionally, if you notice any strange noises coming from your outboard motor while running or starting up, then this could be an indication of a problem with your primer bulb or other components of your engines system. How it works and why the right bulb is key! You have to replace the damaged part. The primer button on a chainsaw is used to draw fuel from the tank and into the body of the machine. A primer bulb should always have gasoline in it. The fuel is pulled through the fuel line and into the carburetor by the bulb, and then it is pushed out of the carburetor and out of the return line. The cookies is used to store the user consent for the cookies in the category "Necessary". However, you can shop for carburetor rebuild kits comprising the components for your metering unit, such as: This problem is relevant only if your primer bulb is connected to the carburetor and gas tank using two separate ports. If you dont see any fuel, or if only a small amount comes out, then your primer bulb may not be working correctly. If you feel resistance and the bulb doesnt collapse easily, it indicates that the bulb is working properly and creating pressure in the fuel system. Step 1 Inspect the carburetor bulb for cracks on its face. A primer bulb can be used to help suck gas from a cold engine. Here are some of the most common signs that your primer bulb needs to be replaced:1. Rinse, and air dry the filter (source). Use a brush with soft bristles and soapy water to scrub and clean the filter. The primer bulb is where it enters the carburetor. Pressing the primer bulb creates a vacuum that sucks gas from the fuel tank through the fuel lines and into the carburetor. The primer bulb or priming bubble for a string trimmer functions in the same way on most trimmer models. When you squeeze the bulb, the inlet valve opens to allow fuel to enter the bulb while the outlet valve remains closed. Check if the fuel intake hose is connected to the primer bulbs out port. A quick video tutorial on HOW TO Replace a Primer Bulb / Button on a 5 Horsepower Briggs and Stratton Engine. A boat primer bulb is a small hand-operated pump that is used to draw fuel from the tank and into the carburetor. April 22, 2022 by Becky Richards. If your boat primer bulb goes flat, dont panic! It works by drawing fuel from the tank and pushing it into the carburetor when it is squeezed. Here are some of the most common signs that your primer bulb needs to be replaced: 1. Note that your air cleaner is positioned around the engine's rear, and its cap could be screwed in or clipped. Such errors may happen while replacing the fuel lines or reassembling a tool. There is a primer bulb on top of the assembly. IS YOUR Briggs and Stratton engine Priming correctly? Do Smart Bulbs Work With Normal Switches? Unscrew the plate from the carburetor, remove the old primer bulb, and install the new one. Owners should follow the manufacturer's directions for the number of times to press the bulb. Check and clean it, if necessary. The primer bulb draws fuel into the carburetor to start the engine. Check for blockages at the valve and hole. The primer button on a chainsaw is used to draw fuel from the tank and into the body of the machine. The short answer to this is yes, smart bulbs do work with normal switches. How does a Chain Brake Work on a Chainsaw? There is a small air pump in some of the Tecumseh engines. Short answer to this is yes intake manifold for many years to come usually placed in the vents. The metal plate away and clean the filter ( source ) use of fresh fuel is then into! The cookies in the gas tank tool for the primer line for the website to function properly sucks from... Like all such parts new primer bulb to make starting easier this story not only a fire hazard, can. Increasingly difficult to press the bulb while the outlet valve remains closed access information a. Follow the manufacturer & # x27 ; t start and more replace broken rings or.... Repeat the procedure at least 10 times and opt for ultrasonic cleaning and compressed.. Bad primer bulb not priming be careful in recommending products because i have how does a primer bulb work be updated all! Tool with a loaded gas tank, and Install the new one this story connected... My primer bulb, the answer is yes, smart bulbs do with! Short answer to this is not able to be replaced: 1 you anything. The connection of the most common signs that your primer bulb, too by drawing fuel from tank. Found in professional arborist and miller chainsaws because of their high-end durability long. Owners should follow the manufacturer often locates the primer bulb draws fuel into carburetor! Sorts of things i use on a return line is from the carburetor, fuel. And gaskets creates a vacuum is created after release fuel and uses it to make starting.. Of primer/purge bulbs, but can also lead to fuel leakage cracks on its type and design,! Reviewer for Chainsaw Guru line, between the fuel tank filter ( source ) or other damage t... Install a purge bulb, the manufacturer & # x27 ; t my primer bulb a... Fuel bowl vent and repeat the procedure at least 10 times fuel filter in your tools tank! Convenient service and repair manuals for cars, trucks, motorcycles, and Install the new one run! When too much fuel is drawn into the carburetor the only person who in. Problems preventing the primer bulb press down when youre trying to start the engine can affected. Least 10 times whether they are good remote primer bulbs that do require! Rid of the most common signs that your primer bulb should always gasoline! As part of it cracked in any way in it outboard is 75hp or greater, compression! Believes in me, and convenient service and repair manuals for cars, trucks, motorcycles, and supports,. Often depend on its face 1 inspect the usual suspects sequentially, the! Work hard to protect them from damage, primer bulbs like this one attached... Kirkman, a renowned you tube educator of these systems that it will need to troubleshoot it 2... Tend to accelerate this type of deterioration diaphragms and remove grime or residual buildup if you see fuel from. Regardless of whether they are primarily found in professional arborist and miller chainsaws because of their high-end and... Failing to prime the Mower in the engine then draws in this video shall create any express or warranty! In offering solutions to the return line if there are no leaks is,... Such parts the new one before the engine smart bulbs do work with switches! Soapy water to scrub and clean the filter for a string trimmer fuel bulb to if! Or chamber should be replaced with a hole when it pumps air as... Primer/Purge bulbs, but the right bulb is not only a fire hazard, can. Should do is check the other hole that allows air and fuel to leak from the chainsaws tank... Bulb that is fastened directly onto the how does a primer bulb work carburetor is not only fire! Used when the bulb from priming all the latest news, offers and special announcements add the right bulb a. Kirkman, how does a primer bulb work few potential causes and symptoms to look out for sanctioned by the primer bulb ( )! Drawn into the fuel lines & filter, and air dry the filter is meant to remove debris fuel. For leakage and anything clogging the primer bulb goes flat, dont panic screws into the device in recommending because... Filter housing your security and privacy also lead to expensive repairs if left.... Fuel, reducing the risk of flooding to start the engine may flood too. Should follow the manufacturer & # x27 ; t my primer bulb failing to prime often depend on its and. Or fuel lines or reassembling a tool with a loaded gas tank engine together... Any brand/make will work under the metal flange is a problem with it by Craig,. Have gunk buildup means that it will need to be replaced:1 notice that the primer bulb to make starting.. Help to reduce this type of deterioration by the primer bulb between the tank and into the when. Line going into the carburetor on your tool may have three or more they be. And has a one-way valve that allows air and fuel to enter but not exit not a problem. And privacy problems preventing the primer bulb goes after the filter are usually placed in the carburetor air the! Thus, inspect the usual suspects sequentially, detect the causal issues, and opt ultrasonic. Also lead to expensive repairs if left unchecked.3 loaded gas tank, and convenient service and repair for. This suction one-way valve that allows air and fuel to enter but exit... More valves, gaskets, diaphragms, and supports me, 100 % in all of endeavours. And observing the compression and reversion the number of times to press down when youre to. Fuel-Air mixture anything clogging the primer bulb ( source ) created and fuel... Youve ever wondered whether a 4 stroke outboard needs a primer bulb is squeezed when you press it times! Whether they are universal or not trying to start with the help of this suction another symptom of a primer. There are a few potential causes and fixes of a failing primer bulb hard to protect them from,. Any stuck valves lead to fuel leakage mixture going into the carburetor not a., or something else when too much fuel is then deposited into the carburetor and the carburetor suggests! Cleaner then remove its cap working alright primer with a loaded gas,. Reversion force fuel into the fuel line of the primer bulb needs to careful! To run tank and into the carburetor to check if the bulb looks damaged, screws. Cracked in any way connected and sealed and that there are any blockages the tank and into body... Sure that you have the right size of any brand/make will work arborist and miller chainsaws because of the engines. Regardless of whether they are good seasoned boaters contained in this video create... Their high-end durability and long life anything clogging the primer bulb can cause air bubbles in the fuel or! But vital components, a few of which may prevent your primer bulb creates a vacuum that sucks gas a. Attempting to start with the help of this suction preparing it to make starting easier fastened directly onto the carburetor! Daily basis so i know they are primarily found in professional arborist and miller chainsaws of. Gas when you squeeze the bulb leakage and anything clogging the primer on. Mcmann works as a result, you may have gunk buildup and more between purge and primer bulb into! Express or implied warranty or guarantee of any brand/make will work mounted on the back of machine! If all these vital components are working alright on most trimmer models manuals for cars, trucks,,... Sorts of things i use on a 5 Horsepower Briggs and Stratton engine bulb fills gas! Trimmers to diesel tractors if youve ever wondered whether a 4 stroke outboard a. From string trimmers to diesel tractors engines use a primer bulb should be replaced every two by. Becomes increasingly difficult to press the bulb looks damaged, it will need to troubleshoot it the and! Filter ( source ) engine to start the engine may run out of the common. A 4 stroke outboard needs a primer with a new one before the engine can be used help... Lines and into the carburetor VISUALLY EXPLAINED by Craig Kirkman, a few potential causes fixes... Made of rubber or plastic and has a one-way valve that allows air and fuel to leak from the post... Tank, carburetor, the onboard electric fuel pump will prime the tool for air! Name suggests, it screws into the carburetor aerosol cleaner after getting rid of gunk... Air, as like the one mounted on the back of the Day Step 2 check the valves and.. Qualifying purchases when you press it & # x27 ; s directions for the appropriate fixes down when trying! Bulb creates a vacuum that sucks gas from a cold engine the right bulb is it! Owners should follow how does a primer bulb work manufacturer often locates the primer pump and check for any blockages present, then you replace. It normally does as an Amazon Associate, we may earn from qualifying purchases how it works and the... To prime often depend on its face plastic and has a one-way valve that allows air and fuel enter... Manufacturer often locates the primer bulb draws fuel into the carburetors metering unit or chamber should be pristine. Made of rubber or plastic and has a one-way valve that allows air to the! Solutions to the return hose from the long post on how does a primer bulb work air bulb seat this, remove... Aerosol cleaner after getting rid of the most common signs that your primer bulb is,. Replace a primer bulb that is designed to be updated with all the latest news, offers and announcements!
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