Here are the steps you can follow. How do you think about the answers? Then, without priming, try restarting with all systems on. Special Shipping Information. The primer bulb sits in the middle of this return line on most chainsaws. The primer bulb on my mower has a tear in it, so it won't "suck" gas into the carburetor. It also forces pressure and vacuum. Thanks for watching. These two holes can also get clogged or be blocked by dirt in the fuel. See if it has an on/off switch. MissIng chainsaw primer bulb? Buy products related to mac chainsaw parts and see what customers say about HIPA Fuel Air Filter Gas Line Primer Bulb Spark Plug for Mcculloch . Can you run a chainsaw without a primer bulb? The purge bulb (more commonly called the primer bulb) manually pumps fuel into the carburetor, which purges the air out of the carburetor. No, it won't work depending on the engine design. Since it has a primer bulb that means additional hose(s). It then just stopped. The primer bulb fills with gas (fresh) but I believe the gas is not getting through the carburettor. Try to start the chainsaw after priming the carburetor. Which is better for a home? His articles have appeared in "Outside Missoula, Outside Bozeman," "Hello Chengdu" and online at GoNomad.com and various other websites. Some chainsaws use a primer bulb to help suck gas into a cold carburetor. It is present in some models of chainsaws to make the starting process easy. Another fuel hose brings any unused fuel back into the tank. The carburetor is a part of the engine that mixes fuel and air together to make a combustion. Under the primer bulb are an inlet and an outlet. Hi, my chainsaw will not start. Fuses or circuit breakers? Otherwise, nice little carburetor! Dirt and other fuel impurities may clog these hoses so an insufficient amount of fuel can pass through the hoses, causing the primer button not to fill. One is the supply, with the filter on the end and the other is the return. Without this button, the carburettor couldn't draw up enough fuel for the crankcase to get moving fast enough to fire off the necessary spark. This suction brings enough gas into the carburettor and cylinder to start the engine. If the fuel lines go through small holes in the case you can cut the ends of the tubing with a razor blade so that it comes to a sharp point. how much (certain concentration of ) bleach  to water for moss kill on corregated  concrete roof ? Small perforations on the rubber could inject enough air into the fuel system to make the suction too weak. When these diaphragms start to go, they will warp out under the pressure and no longer bring fuel into the carburetor, which could cause the primer button to stop filling. Can you run a chainsaw without a primer bulb? Answer Save. Check to make sure the fuel pump pulse passage is drilled so crankcase vacuum pulse can operate the fuel pump diaphragm. Yes ,you need a primer bulb. As previously instructed, everything should now be turned off. URGENT! 1 decade ago. The fuel hoses connect to two elbow connector joints on the carburetor. The primer button, or bulb, on a chainsaw draws fuel from the tank and into the carburetor using suction. Remove the bulb from the engine and check it carefully for any small holes or puncture marks. It draws fuel from the tank and injects it into the carburetor (Walbro WT324). Try to start the chainsaw. does the carb have a check valve to force the air into the tank. Without this button, the carburetor couldn't draw up enough fuel for the crankcase to get moving fast enough to fire off the necessary spark. You can sign in to vote the answer. So I guestimated the connections. Favorite Answer. Easy Starting the Poulan Chainsaw: Steps. When the gas leaves the fuel tank it enters a plastic hose that connects the tank with the carburetor. The primer bulb is otherwise known as the fuel pump. primer bulb : Part Number: 300780002 Specs: Equipment Type: Chainsaw Equipment Type: Brush Cutter Equipment Type: Leaf Blower Equipment Type: Pole Saw Equipment Type: String Trimmer Equipment Type: Tiller Fits Model: HOMELITE : UT10918 Chainsaw HOMELITE : HBC38 HBC40 String Trimmer HOMELITE : UT08514 UT-08542 UT-08542-A UT-08542-B UT-08072 UT-08072A Blower It hadn’t been used for a season and on inspection had brittle fuel lines one of which was broken, I replaced all the fuel lines and the machine started and ran for 30 minutes through the job. Won't start. Some older models of a gas-powered chainsaw have a primer bulb. The primer button, or bulb, on a chainsaw draws fuel from the tank and into the carburettor using suction. I didn't want to drive 10 miles to buy a primer bulb for a Homelite sx 125 2 cycle string trimmer so I used the outside of the bulb mounting plate as a pattern to cut a gasket. 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No, it won't work depending on the engine design. When the bulb is depressed the outlet check valve is forced open and the air and fuel in the bulb passes through the outlet check valve and into the. It is the major cause of a stalled chainsaw engine. The rebooting instructions in Step 2 should improve this condition. Without the bulb your carb will be flooded on a permanent basis. This suction brings enough gas into the carburetor and cylinder to start the engine. 5. Can a water leak increase my electricity bill? having trouble with my poulan chainsaw. Most small engines will not start if the carburetor is dry. The Process To Start A Lawn Mower Without A Primer Bulb: We know that a primer bulb transmits gas in the carburetor bowl to turn the mower on. It has no primer bulb, but I wonder if I could retrofit one to help it start easier. Customer images. Right now it starts, but it dies as soon as you start cutting the grass. Read Top customer reviews about Chainsaw Primer Bulb. Still have questions? 5 Answers. The air in the carburetor is removed and fuel gets in. Get your answers by asking now. Move the fuel line through the primer bulb housing and hold the primer bulb up to the fuel line Mark desired length and cut to size If the old primer suction line was intact, you can measure and cut a new piece of fuel line to the same length and attach it to the intake port on the primer bulb … This video illustrates the proper ways to start a STIHL chainsaw, as well as which methods to avoid (such as drop starting) and why. Currently based in Minneapolis, Minn., Eric Blankenburg has been a freelance journalist since 2000. This video provides step-by-step repair instructions for replacing the primer bulb on an Echo chainsaw. These hoses can be ripped loose from their seats by a number of accidents. Relevance. Step 5: Depress The Primer Bulb. Also on of the tubes are broken. Lube it a bit with oil and it should slide throgh the hole. How To Start A Gas Chainsaw Without STRUGGLING (1-2 Pulls) The first thing to do is to know the mechanics of a chainsaw and how to start it. Also replace the tube that is broken. It also forces pressure and vacuum. I went through the same ordeal several years ago and know this for a fact. I installed the gasket under the mounting plate and the machine started just fine by using the choke. !. @ As the bulb is released and returns to it’s original shape the outlet valve closes and a vacuum is created. On models with a primer bulb, press and release the bulb twice to prime the carburetor, which clears air from the fuel lines and move fuel into the carburetor. These diaphragms will gradually wear out from repeated heating and cooling. Been sitting unused for a long while. My Poulan 2150 chainsaw's primer/air purge bulb is marked 'Primer' on the side of the chainsaw. No, it won't work depending on the engine design. Another cause of the primer's filling problem could be the bulb itself. the primer bulb needed replacing but after replacing bulb saw still only runs a few seconds then dies. Do I need to get one? You'll learn about the saw controls and how to position them related to the starting sequence, for cold and warm starts. I have an old Craftsman chainsaw that runs great, once you finally get it running; it takes a long time to get the fuel in the carb and finally get it started. check valve. Make sure that you get the tubing that is made for fuel. Some of my 2 cycle power equipment have primer bulbs and some do not. Step four: Press the primer bulb. Pressing the primer bulb makes it easier to start the engine with only a few pulls. The primer button, or bulb, on a chainsaw draws fuel from the tank and into the carburetor using suction. Check the points on the underside of the bulb as well. Sounds like the lines are wrong. This helps prime the circuit, which allows your saw to be started. 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