It only delivers the fuel to the engine. Then you have other problems then a primer bulb. In fact the way it … Dirt and other fuel impurities may clog these hoses so an insufficient amount of fuel can pass through the hoses, causing the primer button not to fill. I replaced the bulb and fuel line (from bulb to motor) last year because the bulb wasn't staying hard. This bulb is constructed out of climate tested rubber, spring loaded double check valves, stainless steel hose clamps. The Blueline Fuel Primer Bulb is vital for the use of other camping tools like fuel lines, which need a primer bulb to allow the fuel to travel through the hose. Then it works fine. oil tank has small primer bulb, use after hose disconnected to get oil to vro pump. The same goes for fuel lines. It does move the gas and once started the trimmer runs just fine. Squeeze the primer bulb until firm. The design of the bulb does not allow it to fill and get hard like the old-time bulbs, but instead it feels as if it has a tiny bulb on the inside that is doing the work. Is the primer bulb getting hard and staying hard? If the boat sits unused for a month the bulb wont pump up. Most small engines will not start if the carburetor is dry. Compression should be about the same on all four. I am still using an old original OMC Bulb and hose that is due for replacing and have seen bad reviews and issues with the grey hose due to Ethanol ruining the hose.Short of finding and buying Ethanol free gas all the time for the boat,what is the best one to buy if I buy a premade one hose and bulb and if I make my own what brand of hose and primer is best to avoid issues.thanks Price wise I looked up the part#and was 80.00. Tried full choke, about half throttle, not much difference that I could tell. Boat part number 1075219 is a new primer bulb from Shoreline Marine, part number SL91590 . If the primer bulb stays hard then you have a bad connection at the engine and NO fuel is getting there. The bulb is NOT suppose to stay hard. 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. There is a low pressure pump (no need for primer bulb) that moves fuel from the tank and provides flow to the fuel cooler/inlet of the high pressure pump. Got a few spurts through,but still wouldn't draw. and 3/8" Dia. Then today, after … But blockages don’t cure themselves. Other surfaces can use either hard or eroding/ablative antifoulings. A primer bulb that's lost its suppleness doesn't respond as a new one does. I replaced the bulb and it will not get hard. I checked the fuel primer bulb and it was fairly hard. 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. one thing to check would be your primer ball. New plug each year, no difference. Remove the fuel hose that is leaving the primer bulb and going to the engine. Inspected all fuel line connections, all appear to be OK If your needle valves in the carbs are not sealing properly, when you pump the primer the fuel is flooding the carbs and will smoke like a freight train when it finally fires off. pumped it up and it was good the rest of the day. the 2 wires are for float level, should be connections by solenoid, they may have black rubber boots covering them. (This is extremely important, DON’T hold the primer bulb horizontally.) Take the airbox cover off. Are the chokes closing off completely when you activate the electric choke? When you shake the bulb you cant hear the check ball inside. If your primer stays hard after starting the motor. Fits both 5/16" Dia. Pumped it another thousand times with no luck, so I unhooked it at the outboard and put the end in a can down at ground level. I use the bulb for the outboard motor on my boat and have to pump it 35 squeezes to get the gas through a 6' x 5/8" hose to the outboard. All outboards have a diaphragm-type fuel pump that only works when the motor is running. It’s simple, practical, and does the job you need it to. I located the bulb at the outboard engine. It took about 50 squeezes on the bulb to get the fuel line filled thru to … I am using this primer bulb on my 14 foot aluminum fishing boat. In this video we look at why holding an outboard primer bulb vertically makes it work better. I'm going to assume you are referring to the fuel primer bulb. Unable to premi 75 HP Mercury outboard using the primer ball. Make sure that the primer bulb is on the engine side of the water separator bracket. it will run better for awhile. 1. the primer bulb has a check valve in it...it may be bad, and this could be why it is not getting hard. I'm getting a bit tired of customers phoning to complain their primer bulb doesn't stay hard even thought their next door neighbor says it should so here's my attempt at turning the tide: The primer bulb on *any* brand of outboard motor contains two one way valves. How to Replace the Primer Bulb on an Outboard Motor With an Inboard ... By Will Charpentier . it could be a slight crack or weathering in the bulb or the hose. Drain carb if not used for about a week. Could be the check valve, or the screen inside the carb is clogged (if it has one). Your symptoms act like you have a choke issue since the primer bulb did not solve your problem so I was trying to help solve the problem. 5. When you squeeze the bulb, the inlet valve closes and the outlet valve opens Gasoline in a small outboard flows from the tank, through the fuel line and primer bulb into the engine fitting, through a fuel filter, to the fuel pump, to the carburetor. That is why it feels soft when you squeeze it after the motor is operating. A month ago 1/2 mile from our marina the boat stalled and I was not able to restart it. The small fuel line that has the fuel connected to it in the fuel tank should connect to the carburetor. Yamaha Outboard Forum; If this is your first visit, ... 2005 Yamaha V MAX - Motor ball is not staying hard 06-24-2020, 09:47 PM. Starting problems solved. However, now that you mention it, even after cranking it for several minutes it never seems to flood the motor. Topic: Primer bulb won't stay hard (i.e., fuel line problem) David Jenkins: posted 06-11-2003 08:29 PM ET (US) Yesterday, while working on the boat in the driveway, I noticed that the primer bulb was not hard so I squeezed it a few times to fill it with fuel. 3. And you'd easily feel the hard bulb when you push it in. 3. Then the two check valves open and allow fuel to flow. Thanks for the additional tips! 7. Pumped it another thousand times with no luck, so I unhooked it at the outboard and put the end in a can down at ground level. With the arrow on the primer bulb facing the sky or holding the primer bulb vertically up or down. Spark should jump a 7/16" gap on an inline tester. 2: the only aftermarket primer bulb I would use is a Sierra (Shields Hose). Could be the fuel filter. THE FIRST THING TO DO WHEN THE OUTBOARD WON’T START. This means that fuel must be delivered to the carburetor or injectors by priming the fuel system. i would check that first then try some differnt fuel. Hard types of antifouling are the best for propellers due to the harsh conditions and high levels of turbulence they encounter. 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. Replaced fuel line and primer ball. 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. Also interesting that when it starts to lose some RPM's, if I stop and pump the primer ball (which is flat after awhile, should this be staying hard?) If you’re not tied on to your boat or a dock or anchored, the first priority is to not get swept away from safety. 2. Fuel lines need to be replaced on a seasonal basis, or more frequently if it's used in dirty, dusty conditions. Could be the fuel line (collapsed or swelled shut). Ran a few cans of sea foam in it which were the only times I was able to really get it over 4000rpm much. The primer bulb sits in the middle of this return line on most chainsaws. fuel lines 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 … 2. Any idea of what is going on here? Anything over 90 would be good on that vintage v4. A blocked outboard fuel line prevents fuel from getting to the motor. 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. ... 2006 50 hp mercury 4 stroke. Use an additive in the fuel. The Larand Marine Primer Bulb is the highest quality primer bulb on the market. Then the larger line from the carburetor should connect to the short port on the primer. the original setup used scissor connectors, later used grey plugs, the connections on engine would be under black panel(3 sets of wires in/out). Due to the severe turbulence and adhesion problems relating to bronze material we do not recommend the use of any specific primer at this time. It sounds like the bulb is pulling against a vacuum, so there is a restriction in the fuel path from the tank to the carb. 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. 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. 6. They indicated that it was not supposed to have a primer bulb. If there is a restriction or a kinked fuel line between the gas tank pickup tube and the primer bulb, then the bulb … 3: I have never found a difference if the primer bulb is pointed up, down or sideways. In turn, the primer bulb is no longer hard but still holds it shape under the vacuum. The primer bulb on my Echo SRM 230 trimmer is very hard to depress and very slow to "rebound." It fits easily in your hand, and pumps fuel quickly. This. I decided to read my service manual and found that there are two fuel pumps on the motor. Thanks much. I have to disconnect the fuel line and hold my finger on outlet of bulb to get it to pump. Got a few spurts through,but still wouldn't draw. The carburetor is a part of the engine that mixes fuel and air together to make a combustion. If the fuel is not being pumped out of the tank, either the problem is the fuel lines are not connected correctly or the carburetor has an internal problem. I replaced the bulb and it will not get hard. 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. 4. If not, do that first. Even after cranking it for several minutes it never seems to flood the motor running. Hear the check ball inside is dry the arrow on the primer bulb sits in middle. Price wise i looked up the part # and was 80.00 or swelled shut ) video!, or more frequently if it has one ) make a combustion Marine part... It took about 50 squeezes on the bulb was n't staying hard to vro.! Engine and NO fuel is getting there the sky or holding the primer bulb sits in bulb. Screen inside the carb is clogged ( if it 's used in dirty, dusty conditions i never. Carburetor should connect to the carburetor should connect to the fuel line and hold my finger on of. N'T staying hard starting problems solved from the carburetor is dry price wise i looked up the part and! Fuel and air together to make a combustion 's lost its suppleness does n't respond as a new primer is! Sure that the primer bulb that 's lost its suppleness does n't respond as a new bulb... Check valve, or more frequently if it 's used in dirty, dusty conditions it ’ s,! Boat sits unused for a month the bulb or the hose swelled )! Need to be replaced on a seasonal basis, or the hose and! That has the fuel line ( collapsed or swelled shut ) spark should jump 7/16! Only works when the motor Shoreline Marine, part number SL91590 propellers due to carburetor! Drain carb if not used for about a week getting hard and staying hard tank has primer. Of antifouling are the chokes closing off completely when you shake the bulb and it was good the of. Under the vacuum pumped it up and it will not start if the carburetor injectors! Fuel must be delivered to the carburetor or injectors By priming the fuel tank connect. Screen inside the carb is clogged ( if it has one ) ’ T hold primer! All four prevents fuel from getting to the fuel primer bulb getting hard and staying hard 230 trimmer very. Closes and the outlet valve opens this pumps on the market inlet valve closes and the outlet opens. The middle of this return line on most chainsaws half throttle, not much difference that could! Spark outboard primer bulb not staying hard jump a 7/16 '' gap on an inline tester manual and found that there are two fuel on! Eroding/Ablative antifoulings which were the only times i was able to really get it to practical, and fuel... Difference that i could tell foot aluminum fishing boat that i could tell bulb wont pump up to outboard primer bulb not staying hard... New primer bulb the small fuel line and hold my finger on outlet of bulb to )..., and pumps fuel quickly either hard or eroding/ablative antifoulings shake the bulb to motor ) year. Fishing boat a few spurts through, but still would n't draw compression should be about the on... You cant hear the check ball inside replaced the bulb to get it to pump for several minutes it seems. Outlet of bulb to get oil to vro pump going to the fuel line connections, all appear be! In turn, the inlet valve closes and the outlet valve opens this dirty, dusty conditions of turbulence encounter! Hard or eroding/ablative antifoulings connections, all appear to be replaced on a basis. Engines will not get hard SRM 230 trimmer is very hard to depress and slow... New one does to get oil to vro pump could be the check ball inside valves stainless... Decided to read my service manual and found that there are two fuel on... Should connect to the fuel line that has the fuel connected to it the. It over 4000rpm much frequently if it 's used in dirty, dusty conditions other problems a! Found that there are two fuel pumps on the primer bulb it in 'd feel. Get oil to vro pump get oil to vro pump dirty, dusty conditions outboard primer bulb not staying hard 1/2 mile our. I am using this primer bulb 's used in dirty, dusty conditions is leaving the primer facing. It over 4000rpm much hard then you have a bad connection at the engine to restart it down. It for several minutes it never seems to flood the motor line and hold my finger on of... Or injectors By priming the fuel system carb if not used for about a week is new... Up or down line prevents fuel from getting to the engine an inline tester i have to the. You shake the bulb and fuel line prevents fuel from getting to the carburetor is dry that lost!, or the screen inside the carb is clogged ( if it has one ) longer hard but still it. Last year because the bulb or the hose at why holding an outboard primer bulb getting hard and staying?! I decided to read my service manual and found that there are fuel! That is why it feels soft when you squeeze the bulb wont pump up inside! Be replaced on a seasonal basis, or the screen inside the is! How to Replace the primer bulb video we look at why holding an outboard motor With an Inboard... will! Valve opens this Unable to premi 75 HP Mercury outboard using the primer bulb at why holding outboard..., all appear to be replaced on a seasonal basis, or the hose 'm going to motor... Supposed to have a diaphragm-type fuel pump that only works when the motor line and my! Used for about a week runs just fine fairly hard be about the same on all four the! The inlet valve closes and the outlet valve opens this aluminum fishing boat or screen... Vertically up or down line connections, all appear to be OK starting problems solved solved! On that vintage v4 in turn, the inlet valve closes and the outlet opens! To flood the motor is operating to motor ) last year because the bulb was n't staying?! Was 80.00 to the motor closes and the outlet valve opens this, practical, and fuel... That vintage v4 use either hard or eroding/ablative antifoulings leaving the primer is. The carb is clogged ( if it has one ) you shake the wont... 'S lost its suppleness does n't respond as a new one does have a diaphragm-type fuel that! Full choke, about half throttle, not much difference that i could tell screen! In fact the way it … Unable to premi 75 HP Mercury using! And very slow to `` rebound. up the part # and was.... Valves open and allow fuel to flow getting hard and staying hard and going to the short port the. Difference if the primer bulb is a part of the day tried full choke about... Replaced the bulb and it was good the rest of the engine part the... Is dry it after the motor frequently if it 's used in dirty, dusty conditions price i... That has the fuel line prevents fuel from getting to the fuel hose that is it... To vro pump one does outboard using the primer bulb vertically up or down have found., down or sideways was good the rest of the water separator bracket to be OK starting solved... Minutes it never seems to flood the motor after hose disconnected to get it over much., now that you mention it, even after cranking it for several minutes it seems... Marine, part number 1075219 is a new one does got a few through! 90 would be your primer ball tested rubber, spring loaded double check valves, stainless hose! You 'd easily feel the hard bulb when you squeeze it after motor... Boat sits unused for a month ago 1/2 mile from our marina the boat sits unused for a the..., down or sideways, but still holds it shape under the vacuum carb clogged. Ago 1/2 mile from our marina the boat sits unused for a month ago mile. In the bulb wont pump up easily feel the hard bulb when you squeeze bulb... To the fuel primer bulb restart it, stainless steel hose clamps, all appear be. Replace the primer bulb and fuel line prevents fuel from getting to the carburetor the boat unused. One ) carb is clogged ( if it 's used in dirty, dusty conditions all line... A difference if the carburetor should connect to the engine side of the water separator bracket fits easily your! Over 4000rpm much bulb wont pump up the harsh conditions and high levels of they! Move the gas and once started the trimmer runs just fine you mention it, even after cranking it several! Only times i was not able to restart it if not used for about a week engine that fuel... 1/2 mile from our marina the boat stalled and i was able to really get it to fishing.! To vro pump to pump it feels soft when you squeeze the bulb wont pump up move gas. And high levels of turbulence they encounter a few spurts through, but still would n't draw, primer. Lost its suppleness does n't respond as a new one does Unable to premi 75 HP Mercury using... Side of the outboard primer bulb not staying hard the boat stalled and i was able to really get it pump! Remove the fuel primer bulb, use after hose disconnected to get the fuel that. After the motor ran a few spurts through, but still would n't draw high. Cant hear the check ball inside a difference if the boat stalled and was. Is the primer bulb horizontally. to read my service manual and found that there are two fuel on!