Once you've gained access to the bulb's housing, remove the screws that hold it in place. As a rule, it's a good idea to replace the primer bulb and the fuel lines at the same time when you have the primer bulb assembly dismantled. The same goes for fuel lines. A lawn mower can make your lawn look fresh and fascinating. I have a 1988 Toro lawn mower with a Suzuki 5 hp 2-stroke engine. This carburetor has a fuel feed bolt in the base of the bowl, dirt in the bolt feed hole is a common issue. We would love to hear from you. It is the easiest way to use a lawn mower, and many users swear by it. Remove the old primer bulb. They're either directly on the carburetor, or placed at a distance from the carburetor and connected to it with rubber tubing. amzn_assoc_tracking_id = "smartsprinklercontroller-20"; I haven't had time to look at it, but I did notice the primer bulb was very, very slow to return each time it's pushed. Primer works well & engine starts 1. The method is super reliable and does not take up too much of your time. The method is super reliable and does not take up too much of your time. Also, why does my primer bulb not work? Engine Stalling, Surging or Running Rough. The carburetor is a part of the engine that mixes fuel and air together to make a combustion. Was running good before it was stored for winter, son-in -law left outside under deck. However, in some unfortunate cases, the primer bulb gets damaged or stops working. Several tries with screwdriver which could have easily punctured primer bulb 6. The primer bulb on small engines is a small plastic piece that, when pressed down, draws fuel from the fuel reservoir and into the carburetor. Get shopping advice from experts, friends and the community! The primer bulb has (or is supposed to have) a small vent hole. amzn_assoc_asins = "B01D1NMLJU,B01D15HOIQ,B00IEFXDES,B00VIX4R2U"; How to Start a Lawn Mower Without Primer Bulb? Read more. Reconnect the fuel hose to the bottom of the primer bulb. The only thing to remember is to be careful during replacement because putting the air cleaner in backwards or making a mistake here can damage the lawn mower altogether. amzn_assoc_placement = "adunit0"; Listen to engine and keep it running with primer for 15 to 20 seconds if it starts to stall press the primer … Use the best method to remove it accordingly. Read on: The method is super reliable and does not take up too much of your time. ... stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, bad ignition coil. The good news is that you don’t have to panic or run to. amzn_assoc_title = "Smart Sprinkler Controllers"; This is a after market replacement carburetor for the Briggs 4-7hp engines. If you have a mower with a missing or broken primer bulb, you can still use the mower by employing an alternative method for priming the carburetor. Does the Primer Bulb on a Homelite Chain Saw Have a Hose on It? But it is possible only when your lawn mower works properly. The only thing to remember is to be careful during replacement because putting the air cleaner in backwards or making a. Did this article solve your query? My Mower Leaks Gas From the Primer Bulb The diaphragm on a Briggs & Stratton 550 lawn mower engine is part of the carburetor. All of these conditions are consistent with a gummed / contaminated carburetor and or bad gas. Repairing a Purge Pump on an ECHO Chain Saw, How the Primer Bulb Works on a Briggs & Stratton 5 Horse Engine, eReplacementParts.com: How to Replace a Primer Bulb, Repair Procedures for a Stihl BR600 Backpack Blower Primer, The Gas Primer Button Sticks on a Troy-Bilt Snowblower, How to Replace a Pump Bulb on Leaf Blowers, How to Put New Gas Lines on a Poulan Chainsaw. The reason the engine will run when you use the primer bulb is that the primer bulb bypasses the internal fuel circuits of the carburetor, and injects gas directly into the engine. Fortunately, fuel lines typically slip easily onto small, protruding tubes and are held in place simply from their tight fit. If it is clogged or not there at all, the engine will use the fuel originally primed but then create a vacuum and stall out. Short of taking the mower in for service, is there an easy way to start the mower? Broken Primer Button on 2-Cycle Lawn Boy Lawn Mower I have a 6.5 HP self-propelled, 2 cycle, Silver Pro Series mower with a broken primer button; i.e., when I push the primer, nothing happens. Retainer clip/ring impossible to remove from engine without destroying it 3. I'm not sure of the age. Most small engines will not start if the carburetor is dry. Except the only twist is that when we were on the bay...the primer bulb would return to shape. Since primer bulbs and tubes are both made of flexible plastic or rubber, they will eventually harden, crack and deteriorate over time. I bought a house last April. I usually use a dab of sealer applied with a toothpick to seal up the filter housing, but multiple gaskets work well also. start and run great just for a few seconds, then dies like the switch has been turned off. The air cleaner is present near the engine, and the cover may be clipped on or screwed in. Primer bulbs are usually positioned on the lawn mower one of two ways. The reason why you should be quick is that starter fluid tends to evaporate on exposure to air. The symptoms vary, you may have been directed here by one of the following problems: mower runs rough; runs but only with choke; splutters when I cut on a slope; dies when cutting grass; lawn mower starts and then dies; engine stalls; engine surging. Provided the carb metering chamber is full an engine may run with a cracked primer bulb as it is downstream from the carb. The engine probably starts because gas enters the cylinder when you press the primer bulb. Ineedtech 5-Packs Primer Bulb 570682A for 951-10639A 751-10639 MTD Craftsman Troy-Bilt Ryobi Bolens Snow Blower Thrower, Fit Tecumseh AV520 HMSK100 … Prime it again and it will start and do the same thing. Based on what you have checked I would suspect the primer bulb is bad. It may also make a sound as if it's simply sucking air and not give any resistance when pushed. Please feel free to Comment! The engine dies if a gummed-up carburetor doesn't supply the engine with needed fuel to keep it running. 2nd trip on LSC, the new (?) Instead of struggling to start the engine without priming and putting undue stress on the carburetor, assess the situation to see what the problem is and fix it yourself. 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