Replace. 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. This glowing effect is what heats the cylinder and allows for the successful ignition of the diesel fuel. Refusal to start or cutting out during running may be the first sign of a problem. 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. Inspect the fuel line hoses and connections from the tank to the fuel pump location for kinks and leaks. You also feel a lack of energy and enthusiasm in business. A stuck valve in the primer bulb or a leaking bulb; A blocked spark arrestor screen; Bad compression. Spark - Spark Plug, Ignition unit, HT & short Lead, Stop Switch, Flywheel. Usually though, the problem is caused by parts which wear out or become compromised in some way in the carburetor. August 1, 2013. The pump is too far from the liquid source. I orginally thought it was a fuel line obstruction and replaced all the hoses, primer bulbs, water separator, etc. Fuel Dock – 8:00 AM to 4:00 PM OPEN DAILY. This is my case. If the engine still stalls after ten minutes of running, you can suspect the fuel pump. You may have put gas into the fuel tank that is tainted, or it may actually go bad inside the motor. Fuel lines become brittle over time and can crack or break. Each time you do, it forces gas and air into the carburetor, and each time you … 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. 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. Hours. Step 5. 1 0. brenda. The priming bulb is a small rubber button that pumps fuel into the motor when pressed. Try this it might help you get it started if you NEED to cut the grass.....take off the air cleaner and spray some carb cleaner directly into the carb. A simple way to eliminate the primer bulb and fuel tank as possible causes for the running problems on our 9.9-HP engine is to temporarily connect another tank and fuel hose with primer bulb, then re-test. 3. Two-stroke … 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 ? Usually a bad or failing dome light bulb will produce a few symptoms that can alert the driver of a potential problem that should be serviced. My Mercury engine manuals also talk about anti-siphon valves. They are not all the same size so you need to get one specifically for your carburetor. 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. Re: fuel/water separator affecting primer bulb? 1. I have removed the water separator out of the fuel line. 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. The engine probably starts because gas enters the cylinder when you press the primer bulb. If the dome light bulb wears out it can cause the light to shine less brightly than before. Based on what you have checked I would suspect the primer bulb is bad. This is the beginning of a bad time. You now know that the diesel glow plug is a necessity for a diesel engine to function properly. The symptoms of a bad diaphragm are similar to other mower problems. This has worked for me in a pinch, but repair shop was the Intimate fix. The rough phase in life is triggered by disputes. When it's bad, I prefer to replace the carb. A bad or sticking carburetor float causes engine problems. 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. We get a slight excuse to get angry or upset. 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. When the pump starts to fail it causes the heat rise, which in turn causes the car to stall out. At sea level in a perfect world, you can theoretically lift 65-degree water 34 feet with a self-primer. 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. a. palmer jr. May 16, 2016. a. palmer jr. Tree Freak. They say the way to find out if you've got a problem is to run the engine (or prime the engine) on a separtate portable tank, and see if the problems disappear. 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. 1 decade ago. Getting "bad gasoline" in your outboard can mean two different things. I think the primer bulb is bad. Lawn mower engine surging is a right pain in the Jacksie, it's an engine that runs erratically, revs up and down by itself uncontrollably. When these collapse or crack, they don't function properly and must be replaced. In some cases it may only happen under certain conditions, for example only after the mower gets hot, or only when the fuel level gets low. Like symptoms of the flu, symptoms of a bad starter are easily spotted but can range in severity. This is similar to how an incandescent light bulb will glow after it heats up too. One of the first symptoms commonly associated with a bad or failing dome light bulb is a dome light that shines dimly. I now keep a spare primer bulb and the spare will probably be old and dry cracked from storage when it's needed. If your engine only runs for a few seconds and then shuts off, you could have a gummed-up carburetor. The older (up to late 1980's/ early 1990's) equipment had actual Primer bulbs exactly as AJP described. The bulb appears to stay harder, even while revving it up a couple of times(to see if it would suck the bulb dry). Don't even think about it, Order a new one! It is easy to flood the units. 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. Faulty Priming Symptoms. A purge bulb pushes or pulls fuel through the carburetor to purge air from the pump and metering section. If this bulb is pressed too many times, it will flood the cylinders to the point where the spark plugs can longer ignite; thus, rendering your engine dead in the water. Cleaning doesn't guarantee that you get it all, then your tearing it down again. Time for repair shop unless you are handy with lawn mowers. Most designs pull fuel through the carb and return it to the tank. My father-in-law purchased one many months ago from a different store and his currently does the same thing. When trash or water gets into the fuel supply, it can clog the system or at least cause it to run improperly. How my customers describe fuel system faults, one or more of these may sound familiar. I ran the motor on the muffs and checked the bulb while it was running. 2. spark test - set your tester at 7/16" look for strong blue spark. Store – Closed as of 12/21/20 for Remodeling. A fuel pump emergency can be stopped by paying attention to the temperature gauge. The engine dies if a gummed-up carburetor doesn't supply the engine with needed fuel to keep it … The reservoir of the carburetor is where the fuel is sucked into the intake manifold. 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). 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. Re: Primer bulb is not getting stiff There are several things that can cause a primer bulb not to get hard. Dome light is dim. Call VHF 68 for service. Office – 8:30 to … You push the bulb and fuel squirts into the venturi. 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. Make sure the fuel primer bulb has no cracks or leaks and has not become deformed in any way. 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. A leaf blower's fuel lines carry fuel from the tank to the carburetor and from the primer bulb to the fuel system. But I did have a primer bulb go bad on the 25, after about 8 years of use. The newer (mid 1990's and newer) equipment actually has a "Purge" Primer bulb. When I press it, there is no compression. Symptoms Of Carburetor Faults . Please follow and like us: Submit a Comment Cancel reply. Re: Symptoms of bad "Power Pack" ? You must be logged in to post a comment. Gas Snowblower: Won't stay running . You'll know it when it happens, and the engine will continually die out. I have seen the check valves go bad, and you can still start the saw but it will not run at WOT. The float in the carburetor regulates the amount of fuel or gasoline which resides in the reservoir. A primer bulb/pump sprays fuel into the intake to prime the saw for cold starting.....usually in place of a choke. Be careful to install new fuel lines on the engine the same way the original fuel lines were configured. Fuel - Carburettor, Fuel filter, Fuel mix, Hoses, Primer bulb, Breather. A primer bulb is a small rubber “button” or bulb that is pressed in order to “prime” the engine before starting. 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. There should be none. If you have this system you may or may not have fuel in the bulb. Replace a fuel line that's brittle or damaged. Repair help > Gas Snowblower repair > Gas Snowblower symptoms. Consequently, you stop talking to that person. Location: Typically located adjacent to the carburetor. Lv 5. If the engine runs normally, the fuel tank and primer bulb were likely the cause. See an authorized dealer or contact Briggs & Stratton if you are unsure of any procedure or have … You experience health problems. or drain immediately after pumping it up ? Joined Apr 8, 2007 Messages 13,559 Location Southern Indiana. 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. Allow the gas to sit for several minutes then check to see if any water has settled to the bottom. The way you have your primer bulb mounted could be your issue—and even if it isn’t–this guy’s accent and deadpan delivery are worth watching! May 16, 2016 … Checking this requires specialised pressure testing equipment. Air - Air filter, Carburettor, Manifold, Muffler, Hoses, Breather. How to replace leaf blower fuel lines. Air leaks in the fuel lines after the primer bulb, a bad fuel pump, leaks in the fuel lines after the fuel pump and finally a bad float or worn out needle valve in the carb. Here are a handful of symptoms: Starter Clicking; Whenever you turn your ignition on, you can hear the starter “click, click, click” and the engine fires. One of the first symptoms commonly associated with bad or failing brake light bulbs is a change in the brightness. Before jumping to conclusions and starting to troubleshoot, follow a proper start sequence. What are the Symptoms of Bad Luck or Bad Time? Loosen the in-line fuel filter hose clamps with a screwdriver and pull the filter free. Material: Generally made of rubber or other flexible material. Here’s a good simple demonstration of how a diesel glow plug works: Top 4 Bad Diesel Glow Plug Symptoms. 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