Primer Bulb Check Valve

10pcs Fuel Pump Carburetor Primer Bulbs with Check Valve for Chainsaws new. How does a primer bulb work? Trying to fix a 2 cycle grass trimmer/edger. i also have my choke in place. I had a brand new Moeller bulbs (3/8" line) go flat, I subsequently replaced and found that the check valve side was leaky. In my experience with the primer bulb is that it will hold the siphon on the day of use. The fuel tank vent allows air to. The Primer Bulb: On some 2-stroke carburetors, there is a small priming bulb that allows you to create a vacuum much like the engine would to pull fuel into the carburetor. Our new low permeation primer bulbs meet all EPA requirements. fiber-reinforced fuel line for additional strength and kink resistance. Please no repair questions. You can buy a new primer bulb with fuel lines and clamps at Walmart for about $15, if you need to replace yours. There have been times in the past where I had to work the primer below the tank to get a siphon going before it would pump. The rear check valve malfunctioned by not stopping the gas from flowing back into the tank. Would it then follow that if you are getting air in the primer bulb when attempting to prime the engine, despite the fuel filter being immersed completely in fuel, that the check valve has gone bad? Any way to know which check valve?. Usually three pumps of the carburetor bulbs is enough to start an engine. When the primer bulb is pressed then released, the bulb check valves cause a low pressure at hole (1) of the carburetor body Figure Seven. Check Valve Pulsa-prime carburetors. Retail Price; 7002: Primer Bulb With Built-In Check Valve For 1/4" And 5/16" Fuel Lines: $9. Kink resistant heavy-duty fuel line. Primer bulb not pumping gas to carb. There are actually two check valves in the primer base--one that lets the fuel enter the primer bulb chamber from the vacuum created when the primer bulb is released. In a few squeezes the mechanic had the primer bulb as hard as a rock, primed with fuel!. Shop, read reviews, or ask questions about MERCURY MARINE Primer Bulb Assembly at the official West Marine online store. This replacement bulb pack includes 2 on-carb primer bulbs and 1 remote primer bulb to suit your needs. They prevent air from being sucked into the metering chamber, through the main and idle circuit, during the priming process. Use the Attwood Universal Sprayless Connector to prevent spraying at the fuel tank (8838US6). com : AISEN Fuel LINE Filter Primer Bulb Check Valve for WEEDEATER Featherlite Trimmer 530058709 POULAN P1500 P2500 P3500 P4500 : Garden & Outdoor. I would check all lines including the pulse line, check tank pickup in there, check any air vents, etc. I can't get the primer bulb to fill with fuel. They are not all the same size so you need to get one specifically for your carburetor. Outboard fuel pumps operate on very low pressure and any resistance to fuel flow (like a sticky check valve of course) can. Cheap honda trimmer, Buy Quality trimmer fuel hose directly from China trimmer honda Suppliers: Carburetor Check Valve Primer Bulb & 5mmx2. if you are purchasing one a small one works ok. I replaced the fuel line between the tank and the fuel water seporator, and my tank is set up for twins but I have a single so I changed to the other intake. The parts guy at the boat store told me that the primer bulb should be vertical so the check valve will work properly. It is an identical replacement for a faulty or a missing seat check valve that was installed on a new unit. Repair your Echo Hedge Trimmer for less. Shop, read reviews, or ask questions about MERCURY MARINE Primer Bulb Assembly at the official West Marine online store. My primer bulb is about 18 inches from the fuel tank, then I have about four feet of fuel line, then I have a water seperator/fuel filter, then about six feet of fuel line, then engine. Using materials resistant to the chemistry of today's fuels, this bulb is designed to remain pliable longer. Shop with confidence. The Primer Bulb Is Stuck in My Craftsman 32cc Weedwacker Priming uses gravity and air pressure to jump-start your trimmer. The barbed fitting on my tank is open with no check valve. Cheap Grass Trimmer, Buy Directly from China Suppliers:10pcs/lot Primer Bulb Check Valve For Most WT WY WYA WYB WYJ WYK WYL Series Walbro Carburetor 176-64 176-64-1 4133-121-5200 Enjoy Free Shipping Worldwide! Limited Time Sale Easy Return. 3HP Engine Trimmer Enjoy Free Shipping Worldwide! Limited Time Sale Easy Return. The other connection on the primer bulb just uses a line that goes into the top of the fuel tank much as a common vent line does. 2008-07-06. Filter (2) 5 X Walbro Primer bulb Check Valve/purge valve Part # 176-64. Tom when i first got mine the previous owner said he was having problems with starting, turns out he had put on some new fuel lines including the 1 into the tank, being an Adventure the tank line runs inside a hard plastic pipe, but has a small brass check valve on the end, yes you guessed it he'd fitted it back on the wrong way, so i replaced all fuel lines again and then fitted new primer. fiber-reinforced fuel line for additional strength and kink resistance. Made of high-strength composite material designed to withstand harsh abuse of marine environment. All is as it should be. Connections on a Model 235. Shop with confidence. If not, carburetor has an internal leak. Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. Bulbs will perform at -15 Degrees C (5 Degree F) after exposure to fuel. Remove the filter and repeat the test. Any suggestions out there. In my experience with the primer bulb is that it will hold the siphon on the day of use. For use with our gray color, 5/16 in. Normal operational height of fuel in the carb is below MAX fuel level ,thus soft ball. The only check valve in an Outboard fuel system should be the one located in the primer ball. Repair your Echo Hedge Trimmer for less. A wide variety of bulb valve options are available to you, such as blood pressure monitor, li-ion. Tap the bulb to see if that resolves the issue. Mercury 8M0061875 Fuel 5/16" and 3/8" Primer Bulb. the pump body and out the overflow tube. Every time the primer bulb is depressed this process is repeated causing any old fuel or air that was in the carburetor to be displaced by fresh fuel from the tank. Is there a check valve inside the bulb that goes bad?? Thanks. A slight spring pressure keeps the check valves closed, but not enough pressure to prevent the engine fuel pump from drawing fuel past it once the engine is running. If the carb was for an application that never used a primer bulb, it gets a little more tricky. Ask us about the Walbro 176641 Check Valve. So, I added two loops of safety wire clamps around each end of the bulb, and that stopped the air leak. Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. Then it works fine. carburetor and going to the bulb. primer bulb and the gauge needle should go down. I am using a lot of oil and the engine smokes a lot. Bulb test with pump for kayak bait tank. I thought it was good until I blew into it again and discovered air was slightly passing through it. Primer ball doesnt really stay hard during normal running ,the only reason it gets hard when you "pump" is the fuel system in the motor is full the float comes up and seals the needle valve. Details about 5 Sets 19mm Fuel Pump Carburetor Primer Bulb Check Valve for String Trimmer. (also called a check valve). Salisbury, Md. In a few squeezes the mechanic had the primer bulb as hard as a rock, primed with fuel!. How To Install a Purge / Primer Bulb Properly - Duration: 8:39. Report This by Manage My Life. body and out the overflow tube. So, I recommend doing as I did, which was to plumb in a fuel bypass line with a check valve around the bulb primer. Find many great new & used options and get the best deals for Fuel Line Hose Filter Primer Bulb Check Valve for Poulan 530058709 Weedeater Hot at the best online prices at eBay!. after the engine runs for a while the bulb goes soft, the engine never stops. Find many great new & used options and get the best deals for Primer bulb Check Valve for Ryobi Homelite 26cc 30cc Trimmer 308054003 3074504 at the best online prices at eBay!. The other connection on the primer bulb just uses a line that goes into the top of the fuel tank much as a common vent line does. Prevents fuel spray down stream from the Fuel Demand Valve. If air is not leaking from a hose connection and is internal to the carburetor it is likely that contamination has logged either in the needle valve or check valve. The percentages are high that the problem lies from the check valve back to the gas…although a leak or clog anywhere in the line will cause what you've described. Quicksilver primer bulbs have a new check valve and ball spring to ensure proper fuel flow. Purge fuel comes up through a hole (#16, A) lifting the skirt of the check valve and arrives in the bulb. Then there is the other style that is a little more complex but works on the same principle as the Purge Primer. Primer bulb. It will also need to be fused. Tom when i first got mine the previous owner said he was having problems with starting, turns out he had put on some new fuel lines including the 1 into the tank, being an Adventure the tank line runs inside a hard plastic pipe, but has a small brass check valve on the end, yes you guessed it he'd fitted it back on the wrong way, so i replaced all fuel lines again and then fitted new primer. Filter (2) 5 X Walbro Primer bulb Check Valve/purge valve Part # 176-64. 3 bar (5 psi). Today I changed the primer bulb again, and still the same deal. You can damage the check valve built into the base. If it feels squishy and the engine can "suck" the bulb flat, it's toast — replace it. FREE 2-Day Shipping Electronics & Office Movies, Music & Books Home, Furniture & Appliances Home Improvement & Patio Clothing, Shoes & Accessories Baby Toys, Games, and Video Games Food, Household & Pets Pharmacy, Health & Beauty Sports, Fitness & Outdoors Auto, Tires & Industrial Photo & Personalized Shop See All Departments. 1 Set Fuel Hose Filter Primer Bulb Check Valve for Poulan 530058709 Weedeater. Insert primer bulb into retainer and moisten inside diameter of primer bulb. A lot of leaf blower parts are interchangeable between brands. I can't get the primer bulb to fill with fuel. 312 ID) - Quicksilver Branded MPP Primer Bulb Assembly - 8M0061876 here. Non-corrosive, galvanized hose clamps. Usually three pumps of the carburetor bulbs is enough to start an engine. -mounted primer doesn't fill, it could be the primer plate is NG. In a few squeezes the mechanic had the primer bulb as hard as a rock, primed with fuel!. Step 3: Attach tester to primer return hose. As the throttle butterfly starts to open,. Then there is the other style that is a little more complex but works on the same principle as the Purge Primer. Is there a check valve inside the bulb that goes bad?? Thanks. 5mm/5mmx3mm Fuel Hose Fit HONDA GX25 GX35 HHT35 HHT35S 4-Stroke 1. We can help you figure out what's wrong with your machine and sell you the right parts for the fix. Clamping off both lines an pumping the primer isn't a test we use. Likely got stuck open due to something that got past the fuel filter (if there even is one) and jammed the valve open. After that change, same issue. If the primer bulb pumps up tight but the engine is still hard to cold-start, check to see if your fuel tank may be equipped with an anti-siphon valve. mounted on gas tank type. The PURGE bulb draws air , then fuel out of the carb and returns it to the fuel tank, which is pressurised to around 7 psi. after the engine runs for a while the bulb goes soft, the engine never stops. Double check valve for quick priming and unrestricted flow. The question I have is when running (about 3500 rpm) my buddy notice the gas primer bulb was sucked in flat. The external primer bulb could be mounted somewhere inconspicuous like on the bottom of the cowl, etc. I have run out of gas and put a gallon in and got it running again, but it took some cranking to do it. This item fits into the center of the air purge body. This replacement bulb pack includes 2 on-carb primer bulbs and 1 remote primer bulb to suit your needs. EPA Certified bulb is designed for the harsh marine environment. Zama C1Q Nozzle Assembly Check valve replacement with pics. Mercury 8M0061875 Fuel 5/16" and 3/8" Primer Bulb. Cheapest thing to try is a new bulb. You should also regularly clean or replace the air filter -- a dirty one can contribute to sluggish fuel delivery, and that can lead to poor performance of the priming bulb. Staged Fuel Circuits The idle fuel circuit is called a staged fuel metering circuit. Primer bulb with 5/16" hose barbs. Would it then follow that if you are getting air in the primer bulb when attempting to prime the engine, despite the fuel filter being immersed completely in fuel, that the check valve has gone bad? Any way to know which check valve?. Find great deals on eBay for walbro primer bulb and zama primer bulb. Alcohol-resistant, suitable for use with leaded and non-leaded fuels. Offering discount prices on OEM Mercury Marine parts for over 50 years. There have been times in the past where I had to work the primer below the tank to get a siphon going before it would pump. When the bulb is released, the umbrella check valve is drawn closed. ( Mine has a check valve located at the fuel tank pickup) The vacuum test was not done at sustained WOT. Meets all EPA CARB USCG and ABYC Requirements. A bulb that will prime faster and stand up to all environments. Find great deals on eBay for primer bulb fuel and marine fuel primer bulb. 2008-07-06. The pump also includes an elastic and substantially fuel impermeable bulb substantially encasing the rigid valve body and sealing to the valve body proximate the first and second check valves. Choose Advance Auto Parts for Fuel Pump Check Valve. Outboard powerheads mounted far above the fuel tank do not allow this to happen and should not have a check valve installed. When the primer bulb is pressed the check valve that permits fuel to enter closes and the check valve to the return line opens. The primer bulb would be the first place to check. 3 bar (5 psi). Most fuel tanks have a check valve to prevent fuel from returning to the tank keeping fuel lines full for easy starts, the one on my tank was not operating properly restricting fuel and creating the problem you describe. Connections on a Model 235. Check Valve Pulsa-prime carburetors. Our company is specializing in the production of various kinds of valves and Primer bulb,the valve mainly include: plastic check valve , duckbill valve ,umbrella valve, combination valve , medical check valve and etc. Also there is a check valve located inside the primer bulb which will maintain fuel in the bulb, and inside the carburator so that the carburator does not drain out and run dry. If the check valves in the primer bulb are open it will not create a suction to get the fuel in the line. When the primer bulb is pressed then released, the bulb check valves cause a low pressure at hole (1) of the carburetor body Figure Seven. hi jason, i use a bulb on my 1991 sx 550 and it works a treat. Find great deals on eBay for walbro check valve. A primer bulb is included which helps to suck fuel up into the carburetor before starting. Shop, read reviews, or ask questions about MERCURY MARINE Primer Bulb Assembly at the official West Marine online store. ♦Variety The company produces various kinds of valves and primer bulb, in order to meet your different needs. Also new diaphram. Today I changed the primer bulb again, and still the same deal. The check valve is an important component that controls the airflow in the carburetor, please make sure to refer to the appropriate diagrams of your model for the correct location and application of this part. Theres a chance something happend when it was rebuilt. Find Echo Hedge Trimmer Parts at RepairClinic. Alcohol-resistant, suitable for use with leaded and non-leaded fuels. Outboard fuel pumps operate on very low pressure and any resistance to fuel flow (like a sticky check valve of course) can. The check valve is a small round red piece of rubber inside the bulb with a hole in it, I have even seen them floating around inside the clear bulb, But this is the exact symptom of a primer bulb problem. Primer bulb is injection molded for strength and durability. I was given a yard man lawn mower with a LV195EA engine on it, the previous owner said he replaced the primer bulb because it was chewed off, since then he nor I have been able to effectivly prime the carb, I removed the rubber bulb from its socket the only thing in there is a loose spring in the center hole it also has a machined surface around the center hole thats in good condition, does. Reed valves act as check/one way valves to stop gas flowing backwards. 95: 7003: Primer Bulb With Built-In Check Valve For 1/4" And 3/16" Fuel Lines. Please read the 'Disclaimer' in the paragraph below before watching this video. The primer bulb has 2, ball check valves in it, one in each end. HIPA Pack of 5 188-12 Primer Bulb with 177-64 Check Valve for Most WT Series Carburetor (Renewed) $7. Is that how it works in a perfect world? If so that means that A) I buy a new primer base assembly for $16+shipping B) Try to find some kind of check valve to put in line between primer bulb and gas tank on fuel return line C) Throw the stupid thing in the trash and get a different weed whacker. I thought it was good until I blew into it again and discovered air was slightly passing through it. However, don't get a cheapy from Wally World, got to an Evinrude or Mercury dealer and get a good one. Gas primer bulb going flat! ULTIMATE BASS | BASS FISHING If it just requires pumping up then the check valve in the bulb has gone south and needs replaced. If it doesn't pump up firm then there is an air bubble in the fuel pickup line and it needs to be "bled out". Repair your Echo Hedge Trimmer for less. It doesn't matter if the tank cap is off, or if the lines are off of the carb, fuel goes in but not out. Carburetor Primer Bulb -Pressed too Many Times /GoPed/Dirt Bike ATV/Quad Check Valve Clearance - Duration: 33:16. This carb does not have a primer bulb attached, - Answered by a verified Technician. The short port on the primer bulb is the inlet. Details about 10pcs Fuel Pump Carburetor Primer Bulbs with Check Valve for Chainsaws new. Could be some debris stuck in the primer base or it's gummed up. A bulb that will prime faster and stand up to all environments. The primer bulb needs about 8 or 9 pumps to get firm. Order Primer Bulbs for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. If the bulb is not the issue you likely have a leak in your fuel line between the bulb and your carb. Choose Advance Auto Parts for Fuel Pump Check Valve. The parts guy at the boat store told me that the primer bulb should be vertical so the check valve will work properly. The skirt can be lifted up by incoming fuel but downward pressure seals it against the cover surface. This may cause a bunching or pinching of the material under the clamp causing a leak path for air to enter the fuel system causing a lean fuel condition. As the throttle butterfly starts to open,. They only lasted 2-3 days on a kicker motor. Thanks to an exclusive check valve design, our EPA approved primer bulb provide more output while maintaining fuel flow that exceeds all outboard manufacturers' requirements. The primer that is on the carb has the check valve in the carb part, Guido. Today I changed the primer bulb again, and still the same deal. just found this site through google - good site - I also have a "leaking" primer bulb on an hssk50 tecumseh - 5 hp snowblower - strored dry, suprisingly easy to start this year, but gas started leaking out the hole in the primer bulb - the primer bulb replacement looks simple enough, but is there a membrane or tube inside that could be punctured?. There may be a malfunction in the check valves in the primer base assembly. For use with our gray color, 5/16 in. But there is a small chance that the tube that goes into your tank (and gas) may have a crack also. Check here for special coupons and promotions. Report This by Manage My Life. The first and second stage check valves operate in. In order to get the gas to drain, it's best to disconnect the primer bulb. If not, carburetor has an internal leak. Fast, same day shipping. The primer check valve is found underneath the primer bulb; it helps the fuel to flow in one direction, and allows the primer bulb to fill with fuel. -mounted primer doesn't fill, it could be the primer plate is NG. carburetor and going to the bulb. Some carbs have a check valve in the carb, some have a few while others rely upon the duck bill valve in the primer. Primer bulb not pumping gas to carb. Tom when i first got mine the previous owner said he was having problems with starting, turns out he had put on some new fuel lines including the 1 into the tank, being an Adventure the tank line runs inside a hard plastic pipe, but has a small brass check valve on the end, yes you guessed it he'd fitted it back on the wrong way, so i replaced all fuel lines again and then fitted new primer. Some primers have 1 valve, some have 2 some carbs have a one way valve and some fuel lines have a one way valve. They only lasted 2-3 days on a kicker motor. That's why you need RepairClinic. Primer Bulb. How does a primer bulb work? Trying to fix a 2 cycle grass trimmer/edger. So, I added two loops of safety wire clamps around each end of the bulb, and that stopped the air leak. You can also try removing the line on the primer outlet, squeeze the bulb, and stick your thumb over the outlet as a check valve. Free postage. Maybe you should try and just keep pumping until. Primer bulb. Any suggestions out there. I have a Craftsman Chainsaw Modelwith Walbro carb WT 324 (not WT 324-1). We don't know when or if this item will be back in stock. Today I changed the primer bulb again, and still the same deal. The rear check valve malfunctioned by not stopping the gas from flowing back into the tank. Tap the bulb to see if that resolves the issue. If fuel does move when letting up on the bulb, you either have the fuel lines reversed or, the check valves in the primer base assembly are not functioning. I also replaced the primer bulb itself and the red "duck bill" check valve. A wide variety of bulb valve options are available to you, such as blood pressure monitor, li-ion. I will pass on this information, could be a bad check valve in primer bulb but min has a redundent check valve in the fuel line which has already been replaced. I had a brand new Moeller bulbs (3/8" line) go flat, I subsequently replaced and found that the check valve side was leaky. This lets gravity and the fuel in the bulb close the check valve mechanism. Every time the primer bulb is depressed this process is repeated causing any old fuel or air that was in the carburetor to be displaced by fresh fuel from the tank. Ask us about the Walbro 176641 Check Valve. for large outboards). The PURGE bulb draws air , then fuel out of the carb and returns it to the fuel tank, which is pressurised to around 7 psi. Mine is the original 1999 that came with the motor and still works fine, so I believe Yamaha makes a good primer bulb. As the throttle butterfly starts to open,. Inside the bulb is a check valve that can fail and leave you stranded out on the water. Find many great new & used options and get the best deals for Primer bulb Check Valve for Ryobi Homelite 26cc 30cc Trimmer 308054003 3074504 at the best online prices at eBay!. Find Echo Hedge Trimmer Parts at RepairClinic. An ideal choice for quick tool maintenance. 3/8" ID Fuel Hose Primer BulbEPA ApprovedDouble Check Valve - Speed Prime TechnologyStainless Steel Clamps Gen III Primer Bulb - T-H Marine Supplies 3/8" ID Fuel Hose Primer Bulb EPA Approved Double Check Valve - Speed Prime Technology Stainless Steel Clamps. This item fits into the center of the air purge body. Normal operational height of fuel in the carb is below MAX fuel level ,thus soft ball. A quick and easy fix. Replaced and have a second flat bulb (within 3 days). Standard HDA COLOR CODE Pump diaphragm check valves worn 6. Then I noticed when I pumped the primer bulb fuel tried to flow on BOTH directions, not just getting. Staged Fuel Circuits The idle fuel circuit is called a staged fuel metering circuit. Likely got stuck open due to something that got past the fuel filter (if there even is one) and jammed the valve open. Free postage. Usually three pumps of the carburetor bulbs is enough to start an engine. If the carb was for an application that never used a primer bulb, it gets a little more tricky. I would try dumping a little gas in the primer before returning the bulb. Made of high-strength composite material designed to withstand harsh abuse of marine environment. You can buy a new primer bulb with fuel lines and clamps at Walmart for about $15, if you need to replace yours. Press primer seat into bore with groove on seat facing out. So, I added two loops of safety wire clamps around each end of the bulb, and that stopped the air leak. (also called a check valve). Free 2-day shipping on qualified orders over $35. Moeller Fuel Hose Primer Bulbs. Once the primer bulb is at least 1/4 filled with fuel, the engine is ready for the starter button to be. The carburetor is a part of the engine that mixes fuel and air together to make a combustion. The primer check valve is found underneath the primer bulb; it helps the fuel to flow in one direction, and allows the primer bulb to fill with fuel. When the primer bulb is pressed then released, the bulb check valves cause a low pressure at hole (1) of the carburetor body Figure Seven. About 18% of these are blood pressure monitor, 10% are tool parts, and 7% are other rubber products. But now it's worse, the primer bulb gets hard and stays that way, before the pressure would leak down after it sat a bit. Each time the bulb is released, the umbrella check valve is drawn closed, An orifice bypassing the check valve allows fuel to be drawn up from the fuel tank, through the carburetor fuel pump, metering system and into the primer bulb. I look at fuel lines and primer bulbs like I look at trailer lights replace the whole system. would this be a bad check valve inside the bulb. Some primers have 1 valve, some have 2 some carbs have a one way valve and some fuel lines have a one way valve. A lot of leaf blower parts are interchangeable between brands. Prevents fuel spray down stream from the Fuel Demand Valve. Are there any alternatives to this piece?. Does it have the adjustable needles that are covered up by plastic caps?Was the inlet needle valve in the cab repalced. i also have my choke in place. Check Valve Pulsa-prime carburetors. There's a check valve inside that prevents gas from flowing backward. You should have fuel in the bulb when running. These two end valves are installed in a flexible rubber fuel impermeable bulb substantially encasing the rigid one-way valve bodies and sealed to the squeeze bulb body with metal hose clamps. Most small engines will not start if the carburetor is dry. There may be a malfunction in the check valves in the primer base assembly. Purge fuel comes up through a hole (#16, A) lifting the skirt of the check valve and arrives in the bulb. Is that what you find,if so then that tells me the valve in the bulb isn,t as good as the one in the tank. Connections on a Model 235. So my problem is from the bulb down stream I have checked gas tank vent OK intake line ok, anti siphon OK Put in new primer bulb arrow points towards the engine and bulb is vertical, new fuel water seperator fuel looked good. Moeller offers a wide variety of OEM compatible replacement fuel lines that meet 95′ of the Outboard Applications in the market today. But now it's worse, the primer bulb gets hard and stays that way, before the pressure would leak down after it sat a bit. If the bulb is not the issue you likely have a leak in your fuel line between the bulb and your carb. harbot fuel line filter primer bulb check valve for weedeater featherlite trimmer p1500 mtd primer bulb snap in pump mtd 791-181558 ym1500 y780 y28 y765 y725. Is this ball supposed to move freely or is it permanent. Check these: Fuel vent clear, Fuel pick up clear, Primer blub good (Only use an omc primer blubs, I have found the after market ones to be crap), Fuel line clear, Fuel Filter clear, Is your primer bulb ridged in the correct direction, Right size hose (3/8 id. Due to constant contact with fuel the check valve can deteriorate over time. The other connection on the primer bulb just uses a line that goes into the top of the fuel tank much as a common vent line does. primer bulb and the gauge needle should go down. Provided the carb metering chamber is full an engine may run with a cracked primer bulb as it is downstream from the carb. carburetor and going to the bulb. Put tester in vacuum mode and pump bulb 3 times and the needle should show a vacuum for a minimum of 1 second. Normal operational height of fuel in the carb is below MAX fuel level ,thus soft ball. When the primer bulb is pressed the check valve that permits fuel to enter closes and the check valve to the return line opens. However, don't get a cheapy from Wally World, got to an Evinrude or Mercury dealer and get a good one. After that change, same issue. FREE 2-Day Shipping Electronics & Office Movies, Music & Books Home, Furniture & Appliances Home Improvement & Patio Clothing, Shoes & Accessories Baby Toys, Games, and Video Games Food, Household & Pets Pharmacy, Health & Beauty Sports, Fitness & Outdoors Auto, Tires & Industrial Photo & Personalized Shop See All Departments. If the primer bulb is not working, you may need to troubleshoot it. On another possible path fuel enters a drilled hole (#14, G) that connects to the outlet nipple (#14, H) to the remote primer bulb. They prevent air from being sucked into the metering chamber, through the main and idle circuit, during the priming process. When the primer bulb is pressed the check valve that permits fuel to enter closes and the check valve to the return line opens. Five part series, 001-005 about replacing a high circuit mechanical check valve nozzle in a Walbro HDA carb. We don't know when or if this item will be back in stock. Your Q&A may be posted to Jackssmallengines. for large outboards). If the valve leaks or does not work, there will be reduced or no prime and a hard or no start condition. Fuel Line Hose Filter Primer Bulb Check Valve Set For Poulan 530058709. So, I recommend doing as I did, which was to plumb in a fuel bypass line with a check valve around the bulb primer. Walbro HD carbs are similar. Installs between the fuel tank and the primer bulb. If the bulb is not the issue you likely have a leak in your fuel line between the bulb and your carb. Primer bulb. Staged Fuel Circuits The idle fuel circuit is called a staged fuel metering circuit. I am having primer bulbs problems of my own. Outboard powerheads mounted far above the fuel tank do not allow this to happen and should not have a check valve installed. Price wise I looked up the part#and was 80. Using materials resistant to the chemistry of today's fuels, this bulb is designed to remain pliable longer. Once that's out of the way, the gas should drain easily. The primmer has a check valve inside of it.