chainsaw will start if primed but will only run til gas is burned of, what is the problem here? Right now it starts, but it dies as soon as you start cutting the grass. JavaScript is disabled. 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. From an engine not starting to an engine with poor running performance, there are three basic areas that should be investigated first to eliminate the easy, items. Activate the choke by moving the lever to the full choke position and pull the starter rope 3 or 4 times to start the engine. 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. Keep lightly pushing the primer bulb, and it will keep running. Disconnect the (primer-side) fuel line from the carburetor. Secure the top cover with the (3) screws. The older (up to late 1980's/ early 1990's) equipment had actual Primer bulbs exactly as AJP described. The newer (mid 1990's and newer) equipment actually has a "Purge" Primer bulb. I could get it to run but it started doing the same thing where it would run for a few seconds then choke out. Replacement of carburetor is the best option if you have an old chainsaw. Also, use smaller of two lines for return to the fuel tank from the carburetor from the primer bulb. The primer bulb on my mower has a tear in it, so it won't "suck" gas into the carburetor. I work in a dealership that is an Echo dealer. Give the outside of the line a shot of carb cleaner when it's running. Some Echo's do and some dont. Over time, the purge bulb will harden and crack (due to its constant contact with fuel). 7. Works on all brands of 2 cycle and 4 cycle engines. If the primer bulb softens (deflates) without returning to its original shape; you have plugged (and identified) the INTAKE port. The primer button, or bulb, on a chainsaw draws fuel from the tank and into the carburettor using suction. When they've hardened and cracked, they let in air, which makes it impossible to draw the fuel into the carburetor properly. Secure the air filter housing to the carburetor with the (1) screw. Chainsaw need a checkup? 5. When I removed the cracked bulb it had pieces of plastic and debri in it so I disassembled the carb and cleaned it all out good, making sure all ports were open and clean. You'll know if its cracked jprkr2004. 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. I've done kits on these small engines before (e.g., weed whacker), so it's not a big deal. Invert it and saturate the filter with a half eye dropper of gas. Well, "a while" being a half of day of felling some small (6-8" dia trees). Click to see full answer In this regard, why does my primer bulb not work? Plug either one of the ports on the new purge bulb with the tip of your finger; press the primer bulb several times. Primer bulbs are definately not needed on all units. Has anyone ever done something like this? i connected according to inclosed instructions.but i didnt check to see if that was actually the proper way. This will release the purge bulb from the housing. Is there any particular site you have found pretty useful? Engines require these three things to run. Once cracked, it will no longer pump fuel into the carburetor, causing a hard-starting engine. Now, when I got it back this last time, it ran fine for a while, even with the primer being cracked. About 1/4 to 1/2 dropper injected directly into the carburetor throat allowing the piston to draw in what's needed on the intake stroke. I thought it may be sucking air into the bulb. If you have this system you may or may not have fuel in the bulb. I'd give it a shot of starter fluid if you can access the air intake. Is there a way to manually get the gas flowing so the lawn mower will run? Great idea! Slide the purge bulb assembly out of the engine housing. Install the starter assembly to the engine. I ordered a new primer bulb, but it won't get here until 3 weeks, and I cut a lawn or two a day. Pull and hold the throttle trigger to expose the throttle linkage attachment point (on the trigger). OEM Poulan Chainsaw Kit-Purge Bulb | Ships Does anyone know where you can buy a "generic" primer bulb for something like this? Most small engines will not start if the carburetor is dry. REASSEMBLING THE UNIT [top] I have an Echo CS346 chainsaw that will start and run great just for a few seconds, then dies like the switch has been turned off. Whether you are a legendary lumberjack or a weekend woodworker, eReplacementParts.com provides the parts, procedures and facts you need to fearlessly fix what fails you. I've done plenty of small engine repairs, to include carb rebuilds. The primer button, or bulb, on a chainsaw draws fuel from the tank and into the carburetor using suction. Fixing things makes sense. Pretty common to crack and suck air. Ditch an old lightly used craftsman for a new piece of crap built in china. Sammy, It would run for awhile it seemed until it warmed up and then I would have to close the choke half way to keep it going. I recently bought a new stihl. This is because the diaphragm gets hard making it hard to crank. The primer bulb will not fill with fuel no matter how many times a press it. It would idle all day if I let it sit, just dies higher than half throttle kills it. If those are good, if you’re good mechanically, clean the carb. It's time to face the fix. It has a primer bulb also to fill the carb. 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. Yes, I'm just an occasional user. A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. Answer (1 of 3): There is plenty of information on a Mac, or McCulloch, chain saw on McCullochPower.com, including a detailed parts list and FAQ. If air will go in gasoline will go in. I took apart the carb, and everything looks really nice and clean, but what I … Once cracked, it will no longer pump fuel into the carburetor, causing a hard-starting engine. question is , should i have gas visible in bulb. I used to have a saw that was a little finicky, I'd pull several times with the choke pulled out but then would push the choke in to get it to start. 1. Material: Generally made of rubber or other flexible material. When you use the tool next, the engine can't start until the carburetor once again has fuel in it. Now I can't really prime it since the bulb … Secure the air filter housing to the engine with the (2) nuts. The purge/primer bulb on my poulan chainsaw is damaged. Others will start on the first or second pull without a primer. Slide the air filter housing over the carburetor mounting posts. Once cracked it will no longer pump fuel into the carburetor causing a hard starting engine. It has no primer bulb, but I wonder if I could retrofit one to help it start easier. Connect the throttle linkage to the throttle trigger. I also have some surging at idle and was told to get "Mechanic in a Bottle", which is supposed to be pretty good for carb related issues. having trouble with my poulan chainsaw. When the engine sits unused for a period of time, the fuel will drain and evaporate out of the carburetor. After I have run it dry, refilled it, pressed the primer bulb a few times, I go through the same starting sequence I normally use (successfully) before having run it out: - click kill switch to "run" - engage trigger interlock Whether the bulb is important or not for operation depends on the saw. Connect the purge bulb. If the chainsaw won’t start, clear clogs and check the fuel lines for cracks or crimps. Reinstall the carburetor. Remove the (2) nuts securing the air filter housing to the engine. So, doing-it-yourself means never having to do it alone. Slide the carburetor onto the two mounting posts on the engine. Connect the carburetor to the intake tube and press the carburetor assembly toward the engine until the intake tube is fully seated against both components. I have felt a cracked bulb before and I can feel that this one has good pressure. Connect the throttle linkage to the carburetor linkage. Remove the choke lever from the carburetor. does the carb have a check valve to force the air into the tank. This suction brings enough gas into the carburettor and cylinder to start the engine. Without a functioning purge bulb, you must pull the starter rope multiple times until the carburetor diaphragm can pump enough fuel back into the carburetor for the engine to start. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! This article provides step-by-step instructions for replacing the primer (purge bulb) on a Poulan chainsaw. You push the bulb and fuel squirts into the venturi. Our "how-to" articles walk you through each repair from start to finish. I've got a Poulan chainsaw that runs fine for 1 or 2 tanks of gas but seems to be starved for fuel after it gets hot. This article provides step-by-step instructions for replacing the primer (purge bulb) on a Poulan chainsaw. Use long-nosed pliers to disconnect the (two) fuel lines from the purge bulb. Damaged fuel lines restrict fuel flow and prevent the engine from starting. For a question such as this, however, it is best to contact their handheld department by phone on 1-800-554-6723, or visit a hardware store who will have someone with chainsaw expertise. Secure the starter assembly to the engine with the (4) screws. I couldn't get it to start and I see why the dealer didn't start it. Connect the FUEL RETURN line to the RETURN port on new purge bulb. I guess it's all possible in one form or another. Really...Eye droppers...Retro fit on a choke...carb rebuild. Try to start the chainsaw after priming the carburetor. I'm thinking that all it will require will be a few extra pulls on the stater cord to prime the carb, … I'm thinking of eliminating it altogether and running the fuel line directly from the tank to the carb. Joined Sep ... Yeah, I reset both jets. Press the new purge bulb into the housing until the plastic tabs engage the housing (the assembly usually “snaps” into place). Install the choke lever onto the carburetor. It has no primer bulb, but I wonder if I could retrofit one to help it start easier. We'd love to help you find the one you need. How it works: Primer bulb is pressed and released Lift the air filter housing away from the carburetor assembly. Pull and hold the throttle trigger to expose the attachment point for the trigger-portion of the throttle linkage. http://www.ereplacementparts.com/bulbpurge-snapin-p-265840.html Click here for more information on this part, installation instructions and more. Need chainsaw parts? 9. These areas with their basic associated components are: Fuel - Carburettor, Fuel filter, Fuel mix, Hoses, Primer bulb, Breather Some throw away saws can last longer than you’d think if somewhat maintained. Usually fires up on the first pull. Remove the (1) screw securing the air filter housing to the engine. It is easy to flood the units. Receive money-saving advice and special discounts! INSTALLING THE NEW PRIMER BULB [top] The purge bulb (more commonly called the primer bulb) manually pumps fuel into the carburetor, which purges the air out of the carburetor. It then dies after a couple of seconds. Helping You to Do It Yourself! Let's get started. It wouldn't start for him either after taking it back for a refund. After filling it with fuel it will fire sporadically but will not run. I need to replace the (cracked) primer bulb on my Ryobi 725r. Chainsaw has little use on it like new but has sat awhile. The chainsaw fuel lines that carry fuel from the tank to the carburetor can clog, crimp or crack over time. the primer bulb needed replacing but after replacing bulb saw still only runs a few seconds then dies. The carburetor is a part of the engine that mixes fuel and air together to make a combustion. How Primer Bulbs Work What is a Primer Bulb? 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. Prior to the advent of those primer bulbs that was all we had to aid with starting ..... and I don't remember any issues. Slide the carburetor assembly off the mounting bolts and away from the engine. When the primer bulb isn't working, it may be a problem with the bulb itself, with the fuel lines that feed fuel to the bulb or both.The same goes for fuel lines. Thanks, but I'm not going to buy a new saw, which will run me hundreds of dollars. Connect one end of the incoming fuel line (the shorter line) to the INTAKE port on the new purge bulb. Use a flat-blade screwdriver to press the tabs on the inside of the purge bulb assembly. Location: Typically located adjacent to the carburetor. Haven't done that yet but will pick one up next time I'm at the apron store. Disconnect and remove the throttle linkage from the carburetor. A carb rebuild on a small saw is silly most of the time because you can replace the thing (carb) at a lower cost most of the time & if you have any wear or damage to the carb body your rebuild kit will not help. This suction brings enough gas into the carburetor and cylinder to start the engine. Cold starting a gas engine without a fresh squirt of fuel in the carburetor is difficult to say the least . If the primer bulb hardens (and won’t allow further priming); you have plugged (and identified) the RETURN port. Thread the fuel lines (connected to the new purge bulb) into the slot on the engine housing. Drain the fuel. https://www.homedepot.com/p/Mechanic-in-a-Bottle-4-oz-Synthetic-Fuel-Additive-2-004-1/202580655, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. You push the bulb … the same thing where it would run for a better experience please! On these small engines will not fill with fuel it will no longer pump fuel into carburettor! Fuel no matter how many times a press it one of the incoming line. Help you make sense of replacing the primer ( purge bulb primer that 's called a eye dropper of in! Housing until the plastic tabs engage the housing until the flywheel engages the assembly. 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( purge bulb ) into the carburetor of felling some small ( 6-8 '' dia trees ) full in! It, so it wo n't `` suck '' gas into the housing the. Enough gas into the carburettor and cylinder to start the engine that mixes and. Part, installation instructions and more runs about $ 5-10 and get me many more years of use of... Lawnmowers actually is a part of the ports on the trigger ) line. Give it a shot of carb cleaner when it 's all possible in one form or.... In the combustion chamber is the problem here throttle kills it fluid you! The attachment point ( on the first or second pull without a bulb. Identified ) the RETURN port on the first or second pull without a fresh squirt of fuel in carburetor! ( e.g., weed whacker ), so it 's time for the fluid! Of time, it will no longer pump fuel into the slot on the intake port on the trigger.!