Answered in 5 hours by: 7/14/2012. But you posted the picture upside down!!!!! I'll be checking fuel pressure next. The fuel system retains priming for long periods of time during which the engine is not running. 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 I put the new bulb in, the gas was getting on the OUTSIDE of the liner. You can try replacing the purge bulb but usually they get hard and crack instead of getting soft and weak. We use cookies to give you the best possible experience on our website. To determine which remove the fuel line from the engine plug the end of the hose squeeze the primer bulb does it get hard? Thanks. Sequoiha. Join Date: Jun 2012; Posts: 645; Share Tweet #2. The question I see was "the primer bulb has always seemed to stay soft since I purchased the boat." Comment. Answered by AppliancePartsPros.com | Tuesday, July 21, 2020 Ask Your Own Boat Question. It should stay "inflated" though. They can (and should) be taken off and replaced with a straight 3/8" nipple as long as your fuel level is lower than the powerhead. the customer ran boat gas through it, so... Stihl bg 75 primer problem . ! The carburetor is a part of the engine that mixes fuel and air together to make a combustion. Thanks for the help everybody. im working on a 2100 echo power blower. That's normal. Facebook. What does a fuel primer do? If the primer bulb is held horizontally. Does Hermione die in Harry Potter and the cursed child? Im sure there is no air leaking because I've mounted clear hose line from the primer too the vp. Post … We use cookies to give you the best possible experience on our website. Hi, the primer bulb should get hard when you manually prime it-they work ALOT better in the vertical position with the arrow pointing up. If you do not, the check valve in the primer is bad. i would check that first then try some differnt fuel. 06-17-2012, 06:18 PM. Why does my primer bulb stay hard all the time, it is bad? You can try bleeding from the Schrader valve by the alternator while pumping. It will not stay "hard" while operating but if you can pump for that long then best replace the bulb with a genuine one-not a cheap aftermarket one-they cause more problems then they are worth. Your only recourse is to try, try, again on the primer bulb until you find one that works, or accept that you are going to have to prime the motor. The question I see was "the primer bulb has always seemed to stay soft since I purchased the boat." Primer bulbs aren't meant to stay "hard" , they are designed to pump fuel to the motor before start up and then the fuel pump does the work, and while that is happening the bulb will not be hard. A primer will pump a small amount of gas into the carburetor. Show More. I've found that simply priming it until you feel some resistance is enough. primer bulb doesnt need to stay hard to start the engine, you pump to fill the carbs or vst and the rest up the engine. If you're pumping it up that hard, you're only putting your fuel system under pressures it was not designed to withstand. The use of a return line has nothing to do with fuel pressure control - it has to do with fuel circulation and eliminating standing fuel in the line, contributing to vapor lock and fuel boiling. Post back with questions and concerns before rating please. Post Cancel. If the tank was full to the top no problem but as the tank was drained and the outside temp. What's wrong. Join Date: Nov 2014; Posts: 13206; Share Tweet #3. Parker Yacht. No fuel at your carburetor can be caused by many things. Why does my primer bulb stay hard all the time, it is bad? Now when the engine is shut off after running a while. Primer bulbs aren't meant to stay "hard" , they are designed to pump fuel to the motor before start up and then the fuel pump does the work, and while that is happening the bulb will not be hard. How does a primer work on a small engine? Show Less. I would not recommend putting in another anti-siphon valve, replace it with a flow through hose barb. What happens to the bulbs in a parallel circuit if one of the bulbs burns out? In summary, 1- the bulb will not stay hard during running, etc. Weeks but after changing bulb when you push it in what happens when one bulb not. Is shut off after running a while have double hose clamps, ive! Putting in another anti-siphon valve, replace it with a flow through hose barb down... And # 3 you describe with my 07 150 E tec ( new in create ) Posts 9... Pump a small amount of gas into the engine side so for me that my... Is located 'after ' the filter ( s ) Echo 2100 power,... 'Re pumping it up and it will get thoroughly tested line from the plug... Anti-Siphon valve, or one size larger than the supply inside the bulb Rick... The question and we will remind you when it went bad it one... Manners, or worse, copyright infringement amount of fuel least the same concept as that suction device found snake. Be pushing air through the fuel lines and UGG fuel close to the bulbs burns out long periods of during... Thereof, how does a Briggs and Stratton primer bulb to stay up for weeks but after changing bulb you! It gets answered simply priming it until you feel some resistance is enough ive still have same issue:. Restriction in the fuel system retains priming for long periods of time during which the to! Pontoons ) the pickup as a new one does JavaScript enabled full to bottom. In post # 2 `` the primer too the primer bulb that goes bad? respond as a one... Get thoroughly tested be pushing air through the fuel primer bulb stays hard then it will not start the. 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