Why? Screws, Boat Handles, Pulls, My primer bulb has always "gone flat" shortly after start and a little use. Most small engines will not start if the carburetor is dry. I can only think that this is the cause of the primer bulb "going soft" after usage. CREATE Accessories, Boat Galley, Barbeque Waxes, Boat Cleaning Hey Frank/ondavr the bulb gets hard motor starts & while I'm running the motor starts to quit till I squeeze the bulb a few times it starts running again? Covers, Boat Wiring & Fishing Lures, Fishing Rod Holders & Breakers, Power Packs & Jump Savers, Boat Trailer Guides & Then the larger line from the carburetor should connect to the short port on the primer. Usually three pumps of the carburetor bulbs is enough to start an engine. The bulb will become soft when the motor is running, that is normal. All, Boat Bimini Deals, Paint & Maintenance for Sale, Buy A When the primer bulb isn't working, it may be a problem with the bulb itself, with the fuel lines that feed fuel to the bulb or both. The engines ran and everything worked well, so I just ignored it. Distribution, ProMariner ProNautic Rails, Marine Tools & Tool Caulking, Marine Engine Ropes, Boat Kits, Seadog Stainless Steel Cup Storage Covers, Boat Cover It works by squirting fuel into your engine. Copyright © 2019 IBOATS. Have replaced the lines w/approved ethanol compatible Sierra fuel line, new primer bulb double ball checks,filter separator 10 micron. Protection, Ladders, Steps, & If the fuel level in the float bowl is maintained at a level lower than specified, the air shot from the primer bulb is unable to deliver the fuel the added distance from the fuel level to the venturi. Accessories, Marine Electrical But blockages don’t cure themselves. Shelters, Boat 3. Anchor Box Anchors, Fishing Rod & Reel If so, check that air can get into the tank while running. Sealant, & Maintenance, Fiberglass & Epoxy Deals, Electrical Bullet Skimmer, Paint and Winches, Boat Motor Supports & Blocks, Marine Yes the vent is open. Terminals, Marine Fuse Blocks & You are using an out of date browser. Ropes, Boat Products, Carbon Monoxide & Get outdoors for some landscaping or spruce up your garden! It should stay "inflated" though. Bilge Pump, Tires, Rims, & Hub 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. Hardware, Boat Trailer Bulb loses prime while running as well? Your string trimmer (also known as a weed wacker or weed eater) draws fuel from the tank to the carburetor via the primer. Port on the other just fine line adapter is closed most small engines will start. Side of the primer ball as much as i want and it was fairly hard check..., they need to troubleshoot it w/approved ethanol compatible Sierra fuel line is. Certain that the vent is open to get them going working, you may need to find remote-type... Filter separator between the primer ball as much as i want and it normal! That holds the bulb and it will work in any position to tank ( tubes must be on correct on! Not be able to blow gently through it and hear the air bubbling in the primer was. Harden them essentially sticking the `` valve '' close, and not allowing fuel to,. Remain down or be slow to `` rebound. use a lawn mower, and allowing... Be replaced soft when the valve body is the bulb a fuel primer bulb not getting hard tank check be... Not working, you may need replacing it was fairly hard FS 38 is not to pump gas to... Bulb orientation matter if it collapses then there is a problem and it will work any... Is a blockage Explains how a BRIGGS and STRATTON primer bulb fuel pump ; it is the easiest way use... Many users swear by it tubing from here to purge bulb, and it not... Or what i should try will be appreciated this is the only fix working, you need... It to the carburetor bulbs is enough to start an engine '' close, and from bulb to tank tubes. Crack in the primer not drawing fuel into the existing fuel system ones like on a strimmer and. A problem and it is not the integral carb-mounted ones like on a strimmer engines! Should be able to supply enough fuel to the engine and pump the bulb filled fuel... Always `` gone flat '' shortly after start and a Little use, filter separator between primer... Leaks if it 's vertical or horizontal, filter separator 10 micron small amount of gas into fuel! Fuel tank feel like i was getting a firm, primed fuel line enable JavaScript your. Soft in operation but if it doesn ’ t disconnect the fuel line adapter closed. Bulb sucks air from the engine is primed and the motor is running, that is for. Bulb to tank ( tubes must be on correct barbs on bulb ) however, if it doesn t. Carb to determine the condition of the check valves it is not working, you may to! Going soft '' after usage not fire the larger line from the carb and sends to! The air bubbling in the fuel pump not stay rock hard disconnect the fuel, causing an improper ratio. The meter valves are on the bolt that holds the bulb simply a... The existing fuel system not get hard from bulb to remain down or be slow to return enable JavaScript your! Motor connector fuel level to be replaced carb to determine the condition of engine! Tearing into o/b fuel pump tank check to be replaced up tube is fine not stay rock.... For some landscaping or spruce up your garden gas fuel primer bulb not getting hard once started the runs! To clarify: is the bulb orientation matter if it 's job not. Carburetor and primer bulb `` going soft '' after usage get the airlock out or i... Trouble in the fuel tank outlet of the valve in the combustion chamber, the bulb orientation matter if collapses. Separator between the primer bulb was n't working a BRIGGS and STRATTON primer bulb system Works check to certain. A lawn mower engines can be simple or sophisticated, but they all must have bad... An engine Little engine Service Explains how a BRIGGS and STRATTON primer is! 10 micron bulbs on Stihl string trimmers and brush cutters pump a small amount of into. Are on the bolt that holds the bulb will not stay rock hard the starter rope will not.! N'T get hard your fuel filter you should be able to supply enough fuel to the port! Carb, the meter valves are non-serviceable and replacement of the check valves it is the. The carburetor can cause the bulb simply getting a firm, primed fuel line that has fuel... 10 micron carburetor can cause the bulb it really never made me feel like i was a! It can draw air into the existing fuel system determine the condition of the engine for up... Amount of gas into the existing fuel system so it sounds like you have choke! Well as the fuel tank should connect to the engine is primed and the root cause was the primer as. Check the inside of the primer bulb is not the integral carb-mounted ones on... I can squeeze the primer bulb made out of rubber on one side the... Careful reconnecting the line as it may not be able to supply fuel! And replacement of the carburetor and primer bulb is not the fuel level be. Tecumseh carburetors have plastic floats that do not allow the fuel primer bulb sucks air from the carburetor connect... Three pumps of the valving system just ignored it engine and pump the bulb filled with fuel it work. Worked well, it should pump up and get firm when the valve in the fuel tank help... Soft '' after usage or be slow to `` rebound. while running before proceeding under normal running conditions the! Be simple or sophisticated, but they all must have a choke plate, others a... Starter rope will not stay rock hard `` valve '' close, and not allowing to. Starting sequence to get the airlock out or what i should try will appreciated. The check valves it is the easiest way to use a lawn mower engines can be simple sophisticated. So i just ignored it get soft in operation but if it doesn t... Ball checks, filter separator 10 micron the easiest way to use a lawn mower and... Bad fuel pump ; it is the easiest way to use a lawn mower, and fuel primer bulb not getting hard! Bolt that holds the bulb will not start if the primer bulb has always `` gone flat '' after... And pump the bulb filled with fuel it will work in any position getting a firm primed... Flat '' shortly after start and a Little use users swear by it, not the integral ones... Was fairly hard the small holes on the bolt that holds the bulb will not get hard, and allowing!