Most small engines will not start if the carburetor is dry. Which is better for a home? No, it won't work depending on the engine design. You will need the make and model of the carburetor to get the right primer bulb. Also replace the tube that is broken. A primer bulb … When the gas leaves the fuel tank it enters a plastic hose that connects the tank with the carburetor. fuel tank. Right now it starts, but it dies as soon as you start cutting the grass. This video provides step-by-step repair instructions for replacing the primer bulb on an Echo chainsaw. Took the saw to the repair shop and had them replace all the fuel lines and install a new primer bulb, saw still runs great! Small perforations on the rubber could inject enough air into the fuel system to make the suction too weak. You can replace the fuel lines and the primer bulb yourself. Without the bulb your carb will be flooded on a permanent basis. It also forces pressure and vacuum. No, it won't work depending on the engine design. Try to start the chainsaw. In this case, one more fuel line will need to run from the bulb to the metering inlet on the carburetor. the primer bulb needed replacing but after replacing bulb saw still only runs a few seconds then dies. My poulan chainsaw had a cracked primer bulb. How to properly check on my own if my HVAC system is cooling and heating correctly? Could a Texas Home Owner change out a few ceiling light fixtures and ceiling fan without hiring a electrician? You can activate it either manually or automatically. Lube it a bit with oil and it should slide throgh the hole. Just caught a mouse on a sticky trap. Make sure that you get the tubing that is made for fuel. how much (certain concentration of ) bleach  to water for moss kill on corregated  concrete roof ? Hi, my chainsaw will not start. Favorite Answer. Remove the bulb from the engine and check it carefully for any small holes or puncture marks. $8.58. Step 6: Position The Chainsaw Also, while using it you may see Poulan chainsaw won ‘t start when hot, so, wait for a little in between the uses of the chainsaw. 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 Without the bulb your carb will be flooded on a permanent basis. Also on of the tubes are broken. Check the points on the underside of the bulb as well. Fuel lines need to be replaced on a seasonal basis, or more frequently if it's used in dirty, dusty conditions. I ordered a new primer bulb, but it won't get here until 3 weeks, and I cut a lawn or two a day. does the carb have a check valve to force the air into the tank. This suction brings enough gas into the carburetor and cylinder to start the engine. One is the supply, with the filter on the end and the other is the return. Without the bulb your carb will be flooded on a permanent basis. !. Thanks for watching. check valve. 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. This primer bulb also removes the excess air from the fuel line by pulling fuel into the line. I show how to replace a primer bulb. 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. The air in the carburetor is removed and fuel gets in. Make sure that you get the tubing that is made for fuel. 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. 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 draws fuel from the tank and injects it into the carburetor (Walbro WT324). The carburetor in most chainsaws will use a set of diaphragms to help pull fuel into the carburetor, mix and measure it and send it off to the cylinder. I had this problem several years back. Answer Save. question is , should i have gas visible in bulb. I am reviving a 10 year old string trimmer and all the fuel hoses are disintegrated due to exposure to extended exposure to fuel presumably. You will press it 4-5 times to draw fuel to the carburetor. 5. Lv 7. Customer questions & answers. Then you have to press the primer bulb 3 to 4 times. It is labeled an air purge assembly on the parts diagram. 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 . Before you start determine which fuel line goes where on the carburetor. Carburetor diaphragms should be replaced by a professional. It also forces pressure and vacuum. 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. 5 Answers. You shouldn't be pressurizing the tank. Hot air and fumes coming BACK into house after owner rigged dryer exhaust ! See if it has an on/off switch. Easy Starting the Poulan Chainsaw: Steps. Hunker may earn compensation through affiliate links in this story. Still have questions? Is there a way to manually get the gas flowing so the lawn mower will run? 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. Yes ,you need a primer bulb. 8. Can you run a chainsaw without a primer bulb? Can a water leak increase my electricity bill? Pressing the primer bulb makes it easier to start the engine with only a few pulls. 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. i connected according to inclosed instructions.but i didnt check to see if that was actually the proper way. I have a Old Sears chain saw, 2 strike, no primer bulb. My Poulan 2150 chainsaw's primer/air purge bulb is marked 'Primer' on the side of the chainsaw. Watch videos related to Chainsaw Primer Bulb. Check to make sure the fuel pump pulse passage is drilled so crankcase vacuum pulse can operate the fuel pump diaphragm. It then just stopped. Do I need to get one? How Can I tighten up suction cups on a medical reacher? Customer images. The primer bulb is otherwise known as the fuel pump. These lines can also come loose over time as the hose heats up, expands, cools and contracts, causing air to leak into the system and rendering the suction too weak. URGENT! Otherwise, nice little carburetor! Without going into details the primer bulb forces fuel to the carb jets and not the engine directly. 2-Pack 14" Semi Chisel Saw Chain for McCulloch MAC Chainsaws - (14 .I have a Mac chainsaw. Step 5: Depress The Primer Bulb. How do I dispose of it? These hoses can be ripped loose from their seats by a number of accidents. If your Poulan Chainsaw has a primer bulb. Can you run a chainsaw without a primer bulb? Without going into details the primer bulb forces fuel to the carb jets and not the engine directly. But on the other times, the carburetor bowl remains empty and there is no gas remain in the bowl. Some older models of a gas-powered chainsaw have a primer bulb. 4. The primer bulb sits in the middle of this return line on most chainsaws. Primer bulbs are used in chain saws to pump fuel from the lower gas tank into the carburetor and then into the engine. 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