At sea level in a perfect world, you can theoretically lift 65-degree water 34 feet with a self-primer. Time for repair shop unless you are handy with lawn mowers. Please follow and like us: Submit a Comment Cancel reply. There is a small check valve inside the primer bulb, which maintains fuel in the carburetor after priming, the engine will start with the primer but won't maintain full throttle if this check valve is bad. The Primer Bulb: On some 2-stroke carburetors, there is a small priming bulb that allows you to create a vacuum much like the engine would to pull fuel into the carburetor. You may have put gas into the fuel tank that is tainted, or it may actually go bad inside the motor. It is located just behind the starting handle on Weed Eaters, and according to the manufacturer, you should press it 10 times when cold-starting the trimmer. What are the Symptoms of Bad Luck or Bad Time? The rough phase in life is triggered by disputes. You experience health problems. My father-in-law purchased one many months ago from a different store and his currently does the same thing. A bad or sticking carburetor float causes engine problems. I have removed the water separator out of the fuel line. See an authorized dealer or contact Briggs & Stratton if you are unsure of any procedure or have … A primer bulb/pump sprays fuel into the intake to prime the saw for cold starting.....usually in place of a choke. Repair help > Gas Snowblower repair > Gas Snowblower symptoms. You'll know it when it happens, and the engine will continually die out. How my customers describe fuel system faults, one or more of these may sound familiar. Based on what you have checked I would suspect the primer bulb is bad. The best way to check for water in the gas tank is to remove the fuel line to the fuel-water separating filter and pump at least a liter of gas into a clear container (you will need to install a primer bulb ahead of the filter to do this). When a bulb is about to to burn out it may begin to shine more dimly than it once did; or the opposite, it may glow even brighter than normal. Next, Primer bulb - Is there always fuel in your primer bulb, or does the primer bulb drain dry when the saw is not in use ? yes, bad gas will make it run badly - before you start throwing parts at it, do this: 1. compression test - you want the lowest to be within 10% of the highest. Spark - Spark Plug, Ignition unit, HT & short Lead, Stop Switch, Flywheel. The primer bulb and fittings are fairly inexpensive, and do wear out after awhile, so replacement isn't a bad idea and might solve the problem. Before jumping to conclusions and starting to troubleshoot, follow a proper start sequence. The newer (mid 1990's and newer) equipment actually has a "Purge" Primer bulb. 2. spark test - set your tester at 7/16" look for strong blue spark. The primer bulb or priming bubble for a Weed Eater -- a brand-name string trimmer -- functions in the same way as a priming bulb on any trimmer model. When trash or water gets into the fuel supply, it can clog the system or at least cause it to run improperly. This is similar to how an incandescent light bulb will glow after it heats up too. A purge bulb pushes or pulls fuel through the carburetor to purge air from the pump and metering section. One of the first symptoms commonly associated with bad or failing brake light bulbs is a change in the brightness. Consequently, you stop talking to that person. Cleaning doesn't guarantee that you get it all, then your tearing it down again. 1. Don't even think about it, Order a new one! Loosen the in-line fuel filter hose clamps with a screwdriver and pull the filter free. I have seen the check valves go bad, and you can still start the saw but it will not run at WOT. You push the bulb and fuel squirts into the venturi. The bulb appears to stay harder, even while revving it up a couple of times(to see if it would suck the bulb dry). If your engine only runs for a few seconds and then shuts off, you could have a gummed-up carburetor. Material: Generally made of rubber or other flexible material. Usually though, the problem is caused by parts which wear out or become compromised in some way in the carburetor. Office – 8:30 to … Step 5. You now know that the diesel glow plug is a necessity for a diesel engine to function properly. Inspect the fuel line hoses and connections from the tank to the fuel pump location for kinks and leaks. This is my case. 1 decade ago. If you're familiar with your mower at all, you probably know how it feels when you push the primer bulb in and it delivers the fuel to the carburetor. Each time you do, it forces gas and air into the carburetor, and each time you … Location: Typically located adjacent to the carburetor. The pump is too far from the liquid source. Next, Make sure your primer bulb is working properly, not only does the primer bulb initially get fuel into and through the carburetor but it also has a small check valve inside the primer bulb to maintain a full line of fuel into the carburetor. This glowing effect is what heats the cylinder and allows for the successful ignition of the diesel fuel. You must be logged in to post a comment. Primer bulb is somewhat soft (not collapsed- I replaced it with new right away), but if I pump the bulb while runing and build the pressure up it temporarily gets normal power back. I recommend a name brand bulb (BRP, Merc, Yammy, they all work the same) - maybe $12 more, but the aftermarket bulbs don't have a good reputation for reliability. Most designs pull fuel through the carb and return it to the tank. The priming bulb is a small rubber button that pumps fuel into the motor when pressed. Of course, the fuel pump isn’t the only reason you’re likely to see a spike in the temperature gauge, but when combined with other symptoms it warrants a look. This has worked for me in a pinch, but repair shop was the Intimate fix. Symptoms Of Carburetor Faults . Hours. Replace a fuel line that's brittle or damaged. If the engine runs normally, the fuel tank and primer bulb were likely the cause. Bad Primer Bulb Original Message Jun 30, 2005 11:43 am Hello, I recently purchased a YardMan walk behind mower with a 6hp Tecumseh engine. Joined Apr 8, 2007 Messages 13,559 Location Southern Indiana. I needed to bypass the bad cracked primer bulb last year when I was in a big firewood pile when it went bad on a cold day and I really needed the saw. Allow the gas to sit for several minutes then check to see if any water has settled to the bottom. Call VHF 68 for service. How to replace leaf blower fuel lines. If the engine still stalls after ten minutes of running, you can suspect the fuel pump. WARNING: Always read the engine and equipment manual(s) before starting, operating, or servicing your engine or equipment to avoid personal injury or property damage. Re: Symptoms of bad "Power Pack" ? I orginally thought it was a fuel line obstruction and replaced all the hoses, primer bulbs, water separator, etc. I normally caution users to limit their suction lift to a maximum of 25 feet due to factors such as fluid temperature (think vapor pressure), specific gravity, friction, system leakage, pump inefficiencies and elevation above sea level. A stuck valve in the primer bulb or a leaking bulb; A blocked spark arrestor screen; Bad compression. You also feel a lack of energy and enthusiasm in business. Store – Closed as of 12/21/20 for Remodeling. Air - Air filter, Carburettor, Manifold, Muffler, Hoses, Breather. or drain immediately after pumping it up ? 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