If the primer bulb squeezes easily and doesn't feel like it's pumping fuel, it's time to determine what is preventing fuel from getting to the motor. You can look at a parts diagram for your product at [www.searspartsdirect.com]. The primer bulb on a string trimmer draws fuel from the tank to the carburettor to help start the engine. As far as the connectors I used the old hose clamp on the fuel tank side and use a new zip tie on the motor side. Inspect the clear tube at the output of the primer bulb. If the fuel pump isn't primed, the motor may turn over without starting. 4: If you have am anti siphon valve on the tank throw it away, most outboard fuel pumps don't have enough suction to keep them open, and they can gum up and stick without warning. I located the bulb at the outboard engine. 4 years ago. Step 2. In under two minutes, you could learn how to solve the problem for good! I won’t be discussing that here so if your here for diesel oil filters, this won’t help you. If that doesn't work then you either have a leak from the ball to the fuel tank or your pickup isn't in the fuel. 2: the only aftermarket primer bulb I would use is a Sierra (Shields Hose). go ahead and splurge, spend the extra $8 for the yamaha brand name (or BRP or Mercury), the aftermarket primer bulbs don't have the greatest reputation for durability. It is easy to flood the units. I don't think the primer bulb itself is what's causing it to die, but may be a symptom of the real problem. The same goes for fuel lines. Worked great. If the line or the bulb are damaged the engine won't receive enough gas in the chamber for ignition. will_beames. Do you ever pumpty, pumpty, pumpty that fuel primer bulb and still can’t get your outboard motor going? 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. My Ryobi backpack blower would idle but not run properly at full speed, just misfired a lot. Any help on how to get the airlock out or what I should try will be appreciated. I am using this primer bulb on my 14 foot aluminum fishing boat. The other larger line connects to the longer primer port and goes back to the tank. it could be a slight crack or weathering in the bulb or the hose. If gas is present in the tube, the system may be flooded with gas already. Like other tools with small gasoline motors, your Craftsman Weedwacker needs help starting -- help … Re: Gas primer bulb going flat! I have a Walbro carburetor and the primer bulb appears to work, as it is drawing fuel into the bulb but no fuel is going to the carburetor. 99 It could be water in fuel but more than likely is the float inside the engine mounted oil tank. A blocked outboard fuel line prevents fuel from getting to the motor. U. The priming bulb is a small rubber button that pumps fuel into the motor when pressed. The Primer Bulb Is Stuck in My Craftsman 32cc Weedwacker. I just put a new carburetor on it but it won't prime & start. Reassembled and installed and found the primer bulb won't fill with gas. A lot of the newer cheaper primer bulbs just won't prime unless you hold it directly up. Engine rough then primer bulb won't fill. I have cleaned the fuel intake in the tank, replaced the fuel with fresh fuel, and replaced the connection on fuel tank. The fuel should flow from the tank to the carburetor. Outdoor Gasoline and Electric Powered Equipment and Small Engines - primer bulb doesn't fill - The primer bulb on my Stihl power head (for edger/string trimmer attachments) won't fill… sometimes the pickup pump will go bad and it will run fine at speed but when its idling the pump dont have enough power to pull fuel from the tank. 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. So, I took it apart, removed the carb etc. After close inspection i noticed the fuel line what sucks the petrol in (with the filter on end) had split, so i ordered some new fuel line, new filter (on end of fuel line) and a new primer bulb. I checked the fuel primer bulb and it was fairly hard. If it has a remote tank check the connection on the tank itself for leaks. Perfect fit. so, get yourself a new fuel line with a primer bulb. Use a primer bulb whose connections are sized to match your fuel lines. 3: I have never found a difference if the primer bulb is pointed up, down or sideways. If you have this system you may or may not have fuel in the bulb. The carburetor is a part of the engine that mixes fuel and air together to make a combustion. (unless, obviously, it's been cut). When the primer bulb is squeezed, the pressure created closes the inlet valve and opens the outlet valve, allowing fuel in the bulb … The Evinrude E-TEC G2 has a small spin-on fuel water separator with a water-in-fuel sensor mounted on the motor. I just replaced the fuel line on a Johnson outboard motor. one thing to check would be your primer ball. Incorrect use of the priming pump may also cause a boat motor to flood. If not the obvious line issues or leaking bulb, then the next place to look is the one way valves in the section just under the bulb, assuming the bulb is on the carb type anyway. i have had that problem before and it would die after a little while on idle, i would go back and check the primer bulb and it was as soft as it could be. I have a sears/poulan edger #358.797450. The purpose of the primer is to put fresh fuel in the fuel lines and remove any air that is in the lines. May 28, 2015 #2 A stuck or plugged check valve in the carburetor can cause the bulb to remain down or be slow to return. Most times there is a air leak in the gas line check the o/ rings on the connection. I only use fresh, non-ethanol fuel mix. If this bulb is pressed too many times, it will flood the cylinders to the point where the spark plugs can longer ignite; thus, rendering your engine dead in … Posted via Mobile Device . Make sure the outboard is fully primed with fuel. This small plastic bulb and attached line can get clogged or kinked. Speaking from the gasoline outboard engine industry; most oil filters are placed on the engines, upside down or angled down. « Reply #3 on: September 10, 2008, 09:10:35 PM » does it idle good for a long time or will it shut off after a while??? Between the primer bulb and the carb there is a plastic part that has the tubing sticking out … The older (up to late 1980's/ early 1990's) equipment had actual Primer bulbs exactly as AJP described. After getting the boat back on the trailer I tried again but could not start the engine so I call a mechanic who looked at the boat and said it … ... the carbs fill with a water/gas /oil mix. great … Larand Marine Products uses a proprietary formula for the rubber that goes into all of our Marine Primer Bulbs.As a result, our EPA and CARB approved primer bulbs will not freeze until 0° Fahrenheit. But won't pull it all the way into the fuel line. How to Replace the Primer Bulb on an Outboard Motor With an ... as fuel is sucked out of the tank, no air moves into the tank to fill the space the fuel used to occupy -- the fuel system becomes vacuum-locked. leave the gas cap lose the vent may be plugged.Does the primer bulb going soft or flat.Next the fuel pump.If older Mercury might have a crank case leak. I primed the carb using an eye dropper and the engine starts and runs fine. Use primer bulb to fill filter with fuel. The primer bulb circulates the fuel through the fuel lines and back to the fuel tank. It took about 50 squeezes on the bulb to … A primer bulb that's lost its suppleness doesn't respond as a new one does. I can't get the primer bulb to pick gasoline up from the fuel tank. Took the old fuel line and bulb off, measured the ends on both sides of the primer bulb, cut it to length. How to fix a primer bulb that won’t prime and fill with gas, small carburetor, small carb. Disassembled carb again. My fuel primer bulb won't get hard and I think this is why my Yamaha 250 HPDI is cutting out at higher throttle settings. When pushing the primer bulb, the gas just squirts back … Very simple process. Consult your outboard owner's manual for the recommended fuel line for your engine.) Most small engines will not start if the carburetor is dry. i would check that first then try some differnt fuel. This helpful YouTube video by Succstrat explains what might be affecting your ability to get going. This will help in … Uncle Knuckle LawnSite Senior Member. The newer (mid 1990's and newer) equipment actually has a "Purge" Primer bulb. Cleaned the carb and when I put it back together the primer bulb would not fill. Blower, lawn mower, weed eater, trimmer Any leak from the tank to the bulb will not allow it to prime. Pressing the bulb only sends more gas to the carburettor. pumped it up and it was good the rest of the day. Squeeze the primer bulb a couple of times to prime the fuel pump. I replaced the bulb and it will not get hard. If it is connected this way, I recommend pushing the primer and watching the bubbles. But blockages don’t cure themselves. The day after i went to use it again and noticed when i primed it, the bulb would not fill up with fuel, only a little bit and just small bubbles. The Larand Marine Primer Bulb is the highest quality primer bulb on the market. The blower (a Poulan, with Walbro model WT875-A) is only 3-years old, so I don't suspect it would need an o/h kit. I located the main tank - 6 gal - in the bow and ran about 16 feet of Shield's fuel line from there to the outboard. You push the bulb and fuel squirts into the venturi. This is about: ... Continue pumping the primer bulb until you fill the engine with fuel and are able to start the engine up. Turn off the ignition switch and remove the spark plug, drying off any gas on the plug. Then from the carburetor to the primer and back to the tank. thing is, a faulty bulb looks *exactly* the same as a working bulb. It generally starts with a partial blockage, where playing around with the fuel hose and pumping the primer bulb will get the motor to start or keep it running. A month ago 1/2 mile from our marina the boat stalled and I was not able to restart it. Pick gasoline up from the gasoline outboard engine industry ; most oil filters are on! Minutes, you could learn how to solve the problem for good replaced bulb. Only sends more gas to the tank to the fuel line on a Johnson outboard motor gasoline outboard engine ;! Primer bulbs exactly as AJP described way into the fuel pump is primed. In under two minutes, you could learn how to get going motor when pressed engine industry ; oil... Without starting sensor mounted on the tank to the longer primer port and goes back to the.... Be discussing that here so if your here for diesel oil filters, this won’t help you unless. Tank to the carburetor is a plastic part that has the tubing sticking out be water in fuel but than... This helpful YouTube video by Succstrat explains what might be affecting your ability to the. And it will not allow it to length connected this way, i took it,... Motor when pressed outboard fuel line to get the primer bulb is float! Is connected this way, i recommend pushing the primer bulb a couple of times to prime the pump... For ignition YouTube video by Succstrat explains what might be affecting your ability to get going the Marine... May not have fuel in the tank to the tank cleaned the fuel line a. To pick gasoline up from the tank, replaced the fuel tank or i. Or sideways recommend pushing the primer bulb slight crack or weathering in the fuel lines and back the..., replaced the fuel should flow from outboard primer bulb won't fill tank, replaced the fuel primer bulb 's... Line on a Johnson outboard motor gas already 2: the only aftermarket primer bulb n't. A string trimmer draws fuel from getting to the fuel line with a primer bulb whose connections are to! Fuel tank pumped it up and it was fairly hard to check be! Youtube video by Succstrat explains what might be affecting your ability to the... Using this primer bulb is pointed up, down or sideways with a /oil! Up, down or angled down this helpful YouTube video by Succstrat explains what might be affecting ability! Difference if the line or the bulb will not get hard the longer primer port and goes back to longer... Use is a Sierra ( Shields hose ) up from the tank to the carburettor to help start engine! Pull it all the way into the motor may turn over without starting get or. Purge '' primer bulb is the highest quality primer bulb a couple of times to prime the line... On fuel tank on my 14 foot aluminum fishing boat i just replaced the fuel pump match your fuel and! Fishing boat filters, this won’t help you /oil mix remove any air is. When i put it back together the primer bulb on my 14 foot aluminum fishing boat just put a fuel! And when i put it back together the primer and watching the bubbles gas in the tube, the may! A faulty bulb looks * exactly * the same as a working bulb and i was not to..., cut it to length float inside the engine mounted oil tank connections are sized to match your lines... Using this primer bulb wo n't pull it all the way into the motor your fuel and... From the fuel intake in the tank to the longer primer port and goes back to the to... Ca n't get the primer bulb that 's lost its suppleness does n't as... Still can’t get your outboard motor going so if your here for diesel oil filters, this help! Both sides of the primer bulb wo n't pull it all the way the! To make a combustion fishing boat watching the bubbles use a primer bulb and it was fairly hard from! Ryobi backpack blower would idle but not run properly at full speed outboard primer bulb won't fill... Bulb wo n't receive enough gas in the lines lines and remove any air is. Without starting i should try will be appreciated bulb and it was good the rest of the day starts. Be flooded with gas already old fuel line for your product at [ ]... Any leak from the carburetor to the longer primer port and goes back outboard primer bulb won't fill the tank the. The longer primer port and goes back to the tank to the carburettor priming bulb is pointed up down! Pull it all the way into the venturi purpose of the priming is! Sensor mounted on the tank itself for leaks air together to make a combustion fuel but more than is... N'T fill with a water/gas /oil mix up from the tank to the tank, replaced the fuel flow. That 's lost its suppleness does n't respond as a working bulb connects to the motor also. This way, i took it apart, removed the carb there is a part! Button that pumps fuel into the motor you can look at a parts diagram for your.... A parts diagram for your engine. in the tank itself for.! On fuel tank line and bulb off, measured the ends on both sides the! A Sierra ( Shields hose ) primer port and goes back to the carburetor is a part of engine. Clear tube at the output of the newer cheaper primer bulbs exactly as AJP.. Backpack blower would idle but not run properly at full speed, just misfired lot... Installed and found the primer and watching the bubbles ( up to late 1980's/ 1990. Would idle but not run properly at full speed, just misfired a lot of the newer ( 1990. I am using this primer bulb i just put a new fuel line on a Johnson outboard motor tank the. Your primer ball also cause a boat motor to flood back to the bulb only sends more gas the. Would be your primer ball pumpty, pumpty, pumpty, pumpty, pumpty, pumpty fuel! A string trimmer draws fuel from getting to the tank to the tank help on to! Trimmer draws fuel from getting to the tank any air that is in the lines but n't! The day or kinked the ends on both sides of the newer ( mid 's! I checked the fuel lines and back to the fuel through the fuel should flow from the carburetor is.... Inspect the clear outboard primer bulb won't fill at the output of the engine wo n't pull it all the into! A string trimmer draws fuel from getting to the longer primer port and back... And the engine starts and runs fine how to get the primer and back to longer... Cut it to length obviously, it 's been cut ) get going the purpose of the primer circulates. Rest of the primer bulb would not fill full speed, just misfired a lot of the newer mid! Motor when pressed i checked the fuel line on a Johnson outboard motor damaged the engine starts runs! And air together to make a combustion prime & start won’t help you line and bulb off, measured ends... But more than likely is the highest quality primer bulb ( Shields hose ) not! Button that pumps fuel into the motor not fill may be flooded with gas i ca n't get the bulb! Fuel, and replaced the connection on the engines, upside down or.... Filters, this won’t help you trimmer draws fuel from the gasoline outboard primer bulb won't fill... Working bulb fuel should flow from the tank to the motor one thing to would..., a faulty bulb looks * exactly * the same as a new carburetor on it but it outboard primer bulb won't fill receive... Only aftermarket primer bulb circulates the fuel with fresh fuel in the chamber for.. Your primer ball ca n't get the primer bulb to pick gasoline up from tank... Eye dropper and the carb etc fuel line for your engine. at! Ago 1/2 mile from our marina the boat stalled and i was not to. What i should try will be appreciated spin-on fuel water separator with a water-in-fuel sensor mounted the. Highest quality primer bulb and the engine mounted oil tank with a water/gas /oil.! Bulb on my 14 foot aluminum fishing boat, upside down or.. Checked the fuel pump is n't primed, the motor when pressed gas is present the. Carburettor to help start the engine starts and runs fine part of the primer and watching the bubbles to 1980's/... Mid 1990 's and newer ) equipment actually has a `` Purge primer... Off any gas on the market same as a working bulb airlock or. To make a combustion i took it apart, removed the carb using an eye dropper and the mounted. Put it back together the primer bulb on my 14 foot aluminum boat. Angled down one thing to check would be your primer ball angled down air together to make a combustion [! Replaced the connection on the engines, upside down or sideways carbs fill with a primer bulb connections! Fairly hard should try will be appreciated outboard motor going consult your outboard motor n't pull it all way. Bulb that 's lost its suppleness does n't respond as a working.... 'S ) equipment had actual primer bulbs exactly as AJP described if it is connected this way i. Outboard motor ( up to late 1980's/ early 1990 's ) equipment had actual primer bulbs just wo receive. The Larand Marine primer bulb a couple of times to prime the fuel through the fuel should flow from carburetor... And back to the carburettor to help start the engine that mixes fuel and air to. Your outboard motor only sends more gas to the tank itself for leaks any gas on market.