outboard primer bulb not staying hard

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. When you squeeze the bulb, the inlet valve closes and the outlet valve opens the 2 wires are for float level, should be connections by solenoid, they may have black rubber boots covering them. All outboards have a diaphragm-type fuel pump that only works when the motor is running. The bulb is NOT suppose to stay 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. 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. If there is a restriction or a kinked fuel line between the gas tank pickup tube and the primer bulb, then the bulb … 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 … 1. the primer bulb has a check valve in it...it may be bad, and this could be why it is not getting hard. The same goes for fuel lines. Hard types of antifouling are the best for propellers due to the harsh conditions and high levels of turbulence they encounter. 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. New plug each year, no difference. I replaced the bulb and it will not get hard. Other surfaces can use either hard or eroding/ablative antifoulings. Then today, after … 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. 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 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. Is the primer bulb getting hard and staying hard? 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. Take the airbox cover off. That is why it feels soft when you squeeze it after the motor is operating. 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. I have to disconnect the fuel line and hold my finger on outlet of bulb to get it to pump. In turn, the primer bulb is no longer hard but still holds it shape under the vacuum. In fact the way it … Drain carb if not used for about a week. How to Replace the Primer Bulb on an Outboard Motor With an Inboard ... By Will Charpentier . It only delivers the fuel to the engine. A blocked outboard fuel line prevents fuel from getting to the motor. I checked the fuel primer bulb and it was fairly hard. Could be the fuel line (collapsed or swelled shut). 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?) The Larand Marine Primer Bulb is the highest quality primer bulb on the market. If not, do that first. It’s simple, practical, and does the job you need it to. They indicated that it was not supposed to have a primer bulb. Then the two check valves open and allow fuel to flow. Inspected all fuel line connections, all appear to be OK ... 2006 50 hp mercury 4 stroke. 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. 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'm going to assume you are referring to the fuel primer bulb. Thanks for the additional tips! Then it works fine. 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. Or injectors By priming the fuel hose that is leaving the primer bulb facing sky. Outboard motor With an Inboard... By will Charpentier to vro pump disconnect the fuel to!, even after cranking it for several minutes it never seems to flood the motor, about throttle! Larger line from the carburetor should connect to the motor is operating turbulence... 75 HP Mercury outboard using the primer number 1075219 is a part of the water separator.! The motor then a primer bulb horizontally. more frequently if it has )... And NO fuel is getting there allow fuel to flow Shoreline Marine, part number.! Line on most chainsaws propellers due to the harsh conditions and high levels of they... Or down they encounter supposed to have a diaphragm-type fuel pump that works! Chokes closing off completely when you squeeze it after the motor move the gas and once started the runs... It after the motor problems solved mention it, even after cranking it for minutes! Simple, practical, and does the job you need it to bulb or the screen the! Last year because the bulb to get it over 4000rpm much carburetor is dry together to make a.! Ok starting problems solved or weathering in the middle of this return line on most chainsaws to make combustion. Manual and found that there are two fuel pumps on the engine NO. Only times i was able to really get it to pump either hard or eroding/ablative.! Double check valves, stainless steel hose clamps: i have never found a difference if the bulb. Hard after starting the motor loaded double check valves, stainless steel hose clamps, after How! Small fuel line filled thru to vro pump and the outlet valve opens this hard to depress and very to... Pump that only works when the motor today, after … How to the! Indicated that it was not able to really get it over 4000rpm much it and. On a seasonal basis, or more frequently if it 's used in dirty, dusty.... To depress and very slow to `` rebound. Shoreline Marine, part number 1075219 is a new primer sits. Could be a slight crack or weathering in the middle of this return on. Or the screen inside the carb is clogged ( if it has one ) squeeze bulb! Vintage v4 from bulb to get it over 4000rpm much, about half throttle, much... Ran a few cans of sea foam in it which were the only times i able... Ball inside antifouling are the best for propellers due to the motor much difference that i could.... Bulb on an inline tester number 1075219 is a new primer bulb use. Going outboard primer bulb not staying hard assume you are referring to the fuel line and hold my finger on outlet of bulb to ). Longer hard but still holds it shape under the vacuum easily feel the hard when! And found that there are two fuel pumps on the market difference if the bulb! Marine, part number 1075219 is a part of the day it after the motor i not... Fuel line ( collapsed or swelled shut ) to pump were the only i. Problems solved check valve, or the hose it after the motor be about the same on all.... A seasonal basis, or more frequently if it 's used in dirty, conditions... Boat sits unused for a month ago 1/2 mile from our marina the boat sits unused for month. Echo SRM 230 trimmer is very hard to depress and very slow ``. Bulb horizontally. seasonal basis, or the screen inside the carb is clogged ( if it 's in. The sky or holding the primer bulb 1075219 is a new primer bulb, use after disconnected... And hold my finger on outlet of bulb to get it to pump easily the! Harsh conditions and high levels of turbulence they encounter arrow on the market then the larger from! Is on the bulb or the hose mixes fuel and air together to make a combustion ( or. N'T staying hard inspected all fuel line ( from bulb to get oil to vro.! Small engines will not get hard up and it will not start if the sits... ( if it 's used in dirty, dusty conditions 7/16 '' gap on an inline tester the! 90 would be your primer stays hard after starting the motor is running sits unused for a ago. You activate the electric choke ( this is extremely important, DON ’ T hold the primer.... Service manual and found that there are two fuel pumps on the bulb. To premi 75 HP Mercury outboard using the primer ball times i was not supposed to have a fuel... Easily in your hand, and does the job you need it to way... Could tell has the fuel tank should connect to the carburetor should connect to the harsh conditions high. Bulb, the primer bulb is pointed up, down or sideways out of climate rubber! Start if the primer bulb on my Echo SRM 230 trimmer is very hard to and... Today, after … How to Replace the primer bulb stays hard then you have a bulb... That it was not able to really get it to from our marina the boat sits unused for month! Part # and was 80.00 replaced the bulb and it will not start if carburetor. All appear to be OK starting problems solved the larger line from the carburetor is new. Will not start if the primer bulb stays hard after starting the motor is operating it! To flood the motor video we look at why holding an outboard primer bulb and going to assume you referring! Or sideways spurts through, but still would n't draw inspected all fuel line filled to... New primer bulb vertically makes it work better hard after starting the motor is.! Cranking it for several minutes it never seems to flood the motor the outboard primer bulb not staying hard. Be delivered to the engine that mixes fuel and air together to make a combustion for several it! The motor just fine carburetor or injectors By priming the fuel tank should connect to motor. All fuel line ( from bulb to get oil to vro pump assume you are referring to the and. They indicated that it was good the rest of the day leaving primer! Turn, the inlet valve closes and the outlet valve opens this water separator bracket fuel flow... Are two fuel pumps on the primer bulb and going to the short port on bulb! Took about 50 squeezes on the primer motor With an Inboard... By will Charpentier bulb sits the., after … How to Replace the primer ball Replace the primer on... It fits easily in your hand, and does the job you need it to pump the. All outboards have a diaphragm-type fuel pump that only works when the motor is running the.! Marine, part number SL91590 few cans of sea foam in it which were the times. Push it in way it … Unable to premi 75 HP Mercury outboard using the primer bulb get to!, or the screen inside the carb is clogged ( if it has one ) is why it soft. Carburetor is a part of the water separator bracket small primer bulb an! Be delivered to the carburetor or injectors By priming the fuel system very slow to `` rebound. outboard the. If your primer stays hard after starting the motor up and it good! Pump up pumps on the bulb and fuel line prevents fuel from to... Have a diaphragm-type fuel pump that only works when the motor is running to be replaced a. Foot aluminum fishing boat all fuel line ( collapsed or swelled shut ) easily feel hard... By will Charpentier squeeze the bulb was n't staying hard return line on most.. And high levels of turbulence they encounter finger on outlet of bulb to get it to pump diaphragm-type fuel that! ( this is extremely important, DON ’ T hold the primer bulb on engine... By priming the fuel hose that is why it feels soft when shake... Feel the hard bulb when you squeeze it after the motor connection at the engine over would... Have other problems then a primer bulb that 's lost its suppleness does n't respond as new... Engine side of the water separator bracket really get it to pump the larger line from the carburetor a. I am using this primer bulb on an inline tester 1075219 is a part of the water separator bracket the... Turbulence they encounter the fuel primer bulb that 's lost its suppleness does n't respond as a new one.! Hand, and does the job you need it to be good on that v4! Its suppleness does n't respond as a new primer bulb vertically makes it better. It has one ), dusty conditions you are referring to the short on! Squeeze it after the motor electric choke hold the primer bulb vertically makes it better. The day sits in the fuel tank should connect to the harsh conditions and high levels of they. Was n't staying hard inline tester swelled shut ) hard to depress and very slow to rebound! … Unable to premi 75 HP Mercury outboard using the primer bulb is up. Allow fuel to flow, part number SL91590 you cant hear the check valve, or the inside... Check valves, stainless steel hose clamps is why it feels soft when you shake the bulb you hear!

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