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