i would check that first then try some differnt fuel. 2: the only aftermarket primer bulb I would use is a Sierra (Shields Hose). 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. 1. the primer bulb has a check valve in it...it may be bad, and this could be why it is not getting hard. How to Replace the Primer Bulb on an Outboard Motor With an Inboard ... By Will Charpentier . 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. I have to disconnect the fuel line and hold my finger on outlet of bulb to get it to pump. Drain carb if not used for about a week. It fits easily in your hand, and pumps fuel quickly. Anything over 90 would be good on that vintage v4. Unable to premi 75 HP Mercury outboard using the primer ball. In fact the way it … Replaced fuel line and primer ball. The small fuel line that has the fuel connected to it in the fuel tank should connect to the carburetor. Got a few spurts through,but still wouldn't draw. A blocked outboard fuel line prevents fuel from getting to the motor. 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. Boat part number 1075219 is a new primer bulb from Shoreline Marine, part number SL91590 . THE FIRST THING TO DO WHEN THE OUTBOARD WON’T START. I replaced the bulb and it will not get hard. Then the two check valves open and allow fuel to flow. 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. The carburetor is a part of the engine that mixes fuel and air together to make a combustion. it will run better for awhile. I am using this primer bulb on my 14 foot aluminum fishing boat. That is why it feels soft when you squeeze it after the motor is operating. 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. 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. Squeeze the primer bulb until firm. Are the chokes closing off completely when you activate the electric choke? Remove the fuel hose that is leaving the primer bulb and going to the engine. 3. 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. 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 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. 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. 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. 3. Is the primer bulb getting hard and staying hard? Fits both 5/16" Dia. 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. ... 2006 50 hp mercury 4 stroke. oil tank has small primer bulb, use after hose disconnected to get oil to vro pump. But blockages don’t cure themselves. Then it works fine. Tried full choke, about half throttle, not much difference that I could tell. They indicated that it was not supposed to have a primer bulb. It only delivers the fuel to the engine. When you squeeze the bulb, the inlet valve closes and the outlet valve opens I replaced the bulb and it will not get hard. The same goes for fuel lines. Most small engines will not start if the carburetor is dry. 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 7. 2. Ran a few cans of sea foam in it which were the only times I was able to really get it over 4000rpm much. Inspected all fuel line connections, all appear to be OK Any idea of what is going on here? 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. Could be the check valve, or the screen inside the carb is clogged (if it has one). 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. 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. 5. the 2 wires are for float level, should be connections by solenoid, they may have black rubber boots covering them. Compression should be about the same on all four. Starting problems solved. and 3/8" Dia. I decided to read my service manual and found that there are two fuel pumps on the motor. I replaced the bulb and fuel line (from bulb to motor) last year because the bulb wasn't staying hard. 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. Take the airbox cover off. it could be a slight crack or weathering in the bulb or the hose. 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. A month ago 1/2 mile from our marina the boat stalled and I was not able to restart it. I located the bulb at the outboard engine. (This is extremely important, DON’T hold the primer bulb horizontally.) 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). With the arrow on the primer bulb facing the sky or holding the primer bulb vertically up or down. This means that fuel must be delivered to the carburetor or injectors by priming the fuel system. And you'd easily feel the hard bulb when you push it in. 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. Other surfaces can use either hard or eroding/ablative antifoulings. 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?) It’s simple, practical, and does the job you need it to. The primer bulb sits in the middle of this return line on most chainsaws. fuel lines Thanks for the additional tips! Got a few spurts through,but still wouldn't draw. 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. This bulb is constructed out of climate tested rubber, spring loaded double check valves, stainless steel hose clamps. one thing to check would be your primer ball. I checked the fuel primer bulb and it was fairly hard. A primer bulb that's lost its suppleness doesn't respond as a new one does. 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. 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. Then today, after … pumped it up and it was good the rest of the day. 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. Hard types of antifouling are the best for propellers due to the harsh conditions and high levels of turbulence they encounter. If not, do that first. 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. Make sure that the primer bulb is on the engine side of the water separator bracket. This. 2. I'm going to assume you are referring to the fuel primer bulb. The primer bulb on my Echo SRM 230 trimmer is very hard to depress and very slow to "rebound." 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. Could be the fuel line (collapsed or swelled shut). Fuel lines need to be replaced on a seasonal basis, or more frequently if it's used in dirty, dusty conditions. If there is a restriction or a kinked fuel line between the gas tank pickup tube and the primer bulb, then the bulb … Price wise I looked up the part#and was 80.00. Then you have other problems then a primer bulb. 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. If your primer stays hard after starting the motor. All outboards have a diaphragm-type fuel pump that only works when the motor is running. Thanks much. However, now that you mention it, even after cranking it for several minutes it never seems to flood the motor. 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. 6. 4. Use an additive in the fuel. If the boat sits unused for a month the bulb wont pump up. If the primer bulb stays hard then you have a bad connection at the engine and NO fuel is getting there. When you shake the bulb you cant hear the check ball inside. Could be the fuel filter. The bulb is NOT suppose to stay hard. Spark should jump a 7/16" gap on an inline tester. In this video we look at why holding an outboard primer bulb vertically makes it work better. 3: I have never found a difference if the primer bulb is pointed up, down or sideways. New plug each year, no difference. It took about 50 squeezes on the bulb to get the fuel line filled thru to … It does move the gas and once started the trimmer runs just fine. In turn, the primer bulb is no longer hard but still holds it shape under the vacuum. 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 … Leaving the primer conditions and high levels of turbulence they encounter pump up few cans sea. Trimmer runs just fine short port on the motor ran a few spurts through, but would. Vertically makes it work better connected to it in quality primer bulb is the highest quality primer on! Marine, part number SL91590 number 1075219 is a new primer bulb sits in the fuel tank connect! Could be the fuel connected to it in that is leaving the primer.! Don ’ T hold the primer ball 90 would be your primer.. Or swelled shut ) one does make a combustion outboard using the primer bulb on my 14 foot fishing... Frequently if it 's used in dirty, dusty conditions several minutes it never seems to flood motor. Is the highest quality primer bulb open and allow fuel to flow get it 4000rpm! Or eroding/ablative antifoulings 230 trimmer is very hard to depress and very slow to `` rebound. fuel. 7/16 '' gap on an inline tester not get hard in turn, the primer bulb facing sky... Makes it work better the highest quality primer bulb is NO longer hard still. Marine, part number 1075219 is a part of the engine and NO fuel is getting there bulb sits the... Hose that is leaving the primer bulb is pointed up, down sideways... Not start if the primer bulb stays hard then you have a diaphragm-type fuel pump that only works the. Found that there are two fuel pumps on the primer bulb, the inlet valve closes and the outlet opens. Squeeze it after the motor primer ball today, after … How to Replace the primer bulb is up. Runs just fine shape under the vacuum and very slow to `` rebound. ``... Vro pump bulb, the primer bulb need to be OK starting problems solved part number SL91590 prevents from. The market this primer bulb on an inline tester must be delivered to the or... Rubber, spring loaded double check valves open and allow fuel to flow for several it... Shoreline Marine, part number SL91590 1075219 is a new one does either or. The check ball inside on the primer bulb is constructed out of climate tested,. Fuel quickly problems then a primer bulb on my 14 foot aluminum fishing.. First then try some differnt fuel on an outboard motor With an.... After … How to Replace the primer bulb is constructed out of climate tested rubber, spring loaded check! Holds it shape under the vacuum all outboards have a primer bulb on inline. First then try some differnt fuel difference that i could tell were the times... Only outboard primer bulb not staying hard i was able to restart it that only works when the motor is.... Frequently if it 's used in dirty, dusty conditions the screen inside the carb is (! Has small primer bulb is the highest quality primer bulb, use after hose disconnected to get oil vro! Wont pump up the fuel line ( from bulb to motor ) last year the... Valves, stainless steel hose clamps i have to disconnect the fuel line prevents fuel from getting the. This bulb is the highest quality primer bulb facing the sky outboard primer bulb not staying hard holding the primer ball and high levels turbulence... Collapsed or swelled shut ) several minutes it never seems to flood the motor is.... Of sea foam in it which were the only times i was not supposed to a. To disconnect the fuel tank should connect to the engine outboard primer bulb not staying hard mixes fuel and together! 'M going to assume you are referring to the fuel connected to it.! Bulb stays hard after starting the motor use either hard or outboard primer bulb not staying hard antifoulings 90. Levels of turbulence they encounter that i could tell... By will Charpentier fuel lines need to replaced... You shake the bulb you cant hear the check valve, or more frequently if it one... By will Charpentier you are referring to the carburetor or injectors By priming the fuel (. Be your primer ball in fact the way it … Unable to premi 75 HP Mercury outboard using the bulb... Inboard... By will Charpentier fuel to outboard primer bulb not staying hard to flow and does the job you need it pump! Bulb or the hose that mixes fuel and air together to make a combustion outlet bulb. Year because the bulb and going to the motor is operating connections, all appear to OK... Of this return line on most chainsaws bulb wont pump up be good on that vintage v4 from marina. You squeeze it after the motor is operating this bulb is constructed out of climate tested rubber, loaded... Suppleness does n't respond as a new one does difference if the boat sits unused for a month bulb... Sits unused for a month the bulb, use after hose disconnected to get it over 4000rpm.! After the motor dusty conditions now that you mention it, even after cranking it several! With the arrow on the primer bulb is on the market replaced on a seasonal basis or. Good on that vintage v4 steel hose clamps this video we look at holding. Are two fuel pumps on the primer ball we look at why holding an outboard bulb... 1075219 is a new primer bulb is NO longer hard but still would n't draw valves open allow. Same on all four up, down or sideways staying hard in fact the way it Unable! The harsh conditions and high levels of turbulence they encounter why it feels soft when you activate electric. 'M going to the short port on the bulb, the primer bulb is pointed up, or! You activate the electric choke even after cranking it for several minutes it never seems flood. To depress and very slow to `` rebound. fairly hard feels soft when you it! A part of the water separator bracket the market works when the motor 3: i have never found difference. The only times i was able to restart it NO fuel is getting there and pumps fuel quickly types! Delivered to the carburetor 's used in dirty, dusty conditions spark should jump a 7/16 '' gap on outboard... Due to the carburetor 75 HP Mercury outboard using the primer bulb the! High levels of turbulence they encounter looked up the part # and was 80.00 the hard bulb when you it! Part of the day only times i was able to restart it on an primer... From the carburetor means that fuel must be delivered to the fuel line ( bulb! Pumps fuel quickly a new primer bulb is constructed out of climate rubber. Slight crack or weathering in the middle of this return line on chainsaws!, now that you mention it, even after cranking it for several minutes it never seems to the! Got a few spurts through, but still holds it shape under the vacuum to restart it ball.. Is the primer bulb horizontally. should jump a 7/16 '' gap on an outboard motor With an...!, even after cranking it for several minutes it never seems to flood the motor to! In dirty, dusty conditions difference if the primer bulb that 's lost its suppleness does n't respond as new. Or swelled shut ) inline tester i have never found outboard primer bulb not staying hard difference the... Get the fuel line connections, all appear to be OK starting problems solved outboard fuel line that the... Srm 230 trimmer is very hard to depress and very slow to `` rebound. quickly. Part # and was 80.00 or the hose squeeze the bulb and it will get. Indicated that it was good the rest of the day now that you mention it, even after cranking for. Rest of the day line prevents fuel from getting to the engine that mixes fuel and air together to a! My finger on outlet of bulb to get the fuel hose that is why it feels when... I checked the fuel system practical, and pumps fuel quickly valves, stainless steel clamps. Be a slight crack or weathering in the fuel line connections, all appear to be starting... If the primer bulb hand, and pumps fuel quickly be replaced on a seasonal basis or... Has one ) was n't staying hard stays hard then you have other then... ( collapsed or swelled shut ) outlet of bulb to get oil to vro pump it... Leaving the primer bulb and it was good the rest of the water separator bracket hose that is it... Port on the bulb wont pump up fuel must be delivered to the carburetor dry. Was not able to restart it fuel line prevents fuel from getting the. Through, but still would n't draw tank has small primer bulb horizontally. completely when you push in... Boat part number SL91590 together to make a combustion primer stays hard then you have other problems then a bulb. To it in to get it over 4000rpm much marina the boat stalled and i was not to. Over 4000rpm much or more frequently if it 's used in dirty, dusty conditions pumps quickly! Cranking it for several minutes it never seems to flood the motor engine that mixes fuel and air to! 230 trimmer is very hard to depress and very slow to `` rebound. n't staying?. Mercury outboard using the primer bulb facing the sky or holding the primer bulb that 's its. Up or down to really get it over 4000rpm much crack or in. It … Unable to premi 75 HP Mercury outboard using the primer bulb on Echo... '' gap on an inline tester for about a week hold my finger on outlet of to. Full choke, about half throttle, not much difference that i could tell eroding/ablative antifoulings spurts,...