Question about Tecumseh Lawn Boy Push Mowers Insight Silver Powered Series - Sens - A - Speed Walk Behind Mower - 10685

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What does the other end of the primer bulb tube connect to? Years ago, I replaced the carb on my silver series with one that did not prime. Now I'd like to prime but don't know what I need?

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Posted on Jan 02, 2017

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SOURCE: How do I replace the primer bulb on my lawnboy

You must remove the engine cover (three torx screws) then you can pull the line off the plastic bulb disk and remove it from the cover by pushing the side clips.
Put silicone on the bulb disk and force the bulb on to the disk. I had to use a vice to hold the disk, it is a very tight fit. When you get the bulb on the disk, reinstall it in the engine cover and reattach the hoses. The gas tank hose will probably need to be pushed on to the carberator and the gas tank also. This is hard work but is the only way you can instal the bulb.

Posted on Sep 20, 2010

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Primer bulb not pumping fuel into carb, pull it out, no splits etc. Once I get fuel in it starts and runs fine??


Probably a valve in the priming system is stuck. It allows fuel to flow into the bulb from the tank, the valve should close then and allow the bulb pressure to spray into the carburetor. Could also be the opening into the carburetor from the prime bulb is blocked.

Mar 27, 2015 | Garden

1 Answer

Have huqvarna 350 it will not prime the bulb is good it check it . how can i check to see if it the carb or some other part of the fuel transfer system? when i pump i see the fuel from the carb being...


The bulb pulls fuel from the carb, if there is no fuel in the carb then it will not prime, reasons for no fuel in the carb is, blocked fuel filter in the tank, fuel hose trapped or split, internal filter in the carb, under the pump diaphram ( alloy cover on the carb held with a single screw ) blocked, you can test the primer, pull the two pipes off, the longer tube on the back of the primer should create a pressure when you press the bulb, the shorter connection should create a suction when you let go of the bulb.The suction side should be connected to the carb.

Sep 09, 2011 | Husqvarna 350 18 Inch Gas Chainsaw 52CC...

1 Answer

PowerMac by McCulloch PM425AV-18 38cc. I have replaced the line from the fuel mixture tank to the primer bulb & replaced the primer bulb. Now the chainsaw won't keep or looses the prime. Now...


Are you sure you have conected the pipes the correct way round, the fuel hose from the tank with the filter on the end goes to the main fuel inlet on the carb, nearest to the alloy pump cover, the other conection off the carb goes to the shorter conection on the back of the primer, the longer pipe on the primer goes back to the tank, just remember the primer pulls fuel from the carb, into the bulb, and back to the tank.

May 15, 2011 | McCulloch 16 Inch Gas Chain Saw MCC1635AK

1 Answer

Walbro WT891 carb on a Craftsman chainsaw. Carb is brand new, all fuel lines and fule filter replaced. I prime the carb with the little plunger, chainsaw starts up and runs out of fuel within 30 seconds....


Who connected these hoses? the normal routing for a machine with a primer is like this, the fuel hose from the tank with the filter on the end goes to the carb fuel inlet nozzel ( not to the primer ) nearest to the pump cover ( cover on carb held with one screw ) the pipe from the metering side of the carb connects to the shorter nozzel on the primer bulb ( suction side ), the longer nozzel on the primer ( pressure side ) connects to the pipe going back to the tank, just remember the primer pulls fuel from the carb,into the bulb, and pushes it back into the tank, it is not actually a primer it is a purge. because it is connected this way it is impossible to flood the engine no matter how many times the bulb is pressed.
Let me know if it starts and runs.

Jan 31, 2011 | Poulan Garden

2 Answers

My chain saw 14" homelite


primers pull fuel from the carb and dumps it back into the tank, so if the bulb will not prime the chances are the fuel filter in the tank is blocked, pull the fuel hose through the filer hole and replace the filter on the end.

Jan 27, 2011 | Garden

1 Answer

Replace fuel lines bubble will not prime carb. which line receives the filter?


This is an ongoing issue for users, and rightfully so. Small diameter line out of fuel tank (has filter in-tank on end) connects to the side of the carburetor that has the fuel pump....that is the cover without the hole in it. Other larger diameter fuel line out of tank connects to the longer nipple on the external purge/primer bulb. The bulb "pulls" fresh fuel from the fuel tank to the carb and then out of the carb to itself, where it then pushes any air/old fuel back into the fuel tank. The remaining larger diameter fuel line in this setup goes from the metering chamber (has cover with writing on it and a vent-hole) side of the carburetor to the smaller nipple on the purge/primer bulb. Years ago on 2-stroke trimmers, primers were not even used,...you choked the carb with a slide lever and gravity let fuel enter the carb from above...a few pulls, a "pop"...slide it off of choke and away you went.
If the purge/primer bulb is on top of the carb...small line from carb body to small hole in tank with filter. Larger diameter line goes from the bulb on the fuel pump side of the carb to the larger hole in the fuel tank where the line is held in place with a nylon nipple connector that keeps the line from pulling out of the tank

Aug 22, 2010 | Craftsman 25cc Gas Line Trimmer

3 Answers

I have a weedeater series 300 lawnmower. When I prime it, it will run for about 5 seconds and then stops. It burns off the gas from priming it and then cuts off. If I do this about 20-30 times then it will...


thats a common problem with those briggs motors. There is a plastic tube that goes from the back of the carb to the other side of the motor. There are two small bolts that hold the tube down opposite the carb end of the tube. They loosen over time allowing to much air to get in. Also the tube cracks but not to often. If that doesn't help you need a kit that comes with a gasket and a diaphram. you may need that because the tube warps were it meets the carb. That should fix it.

Jun 18, 2009 | Garden

2 Answers

Primer bulb on weedeater won't prime


when you prime the bulb it sucks gas from the tank with the small tube, any excess gassed pumped will be fed back to the carb via the big tube leading to the tank. If you prime it and the bulb stays pushed down, then you have a clog or kink. To fix , pull the small tube out of the tank through the fill hole. Pull off the filter on the end and put the tube back in the tank. If it primes, your fuel filter was clogged. If it still wont prime check the hose going to the carb and make sure isnt clogged or kinked.(take of carb and blow in it). If that doesnt fix it take off the bulb from the carb with two screws. The bulb assembly will come off too(rectange metal thing) Take off the two black gaskets, be carefull with them. Take off hoses from carb and bulb asembly. Blow carb cleaner in all holes and over surface. Put back together.
If the carb wont prime and the bulb isnt staying depressed. then you might have a bad bulb or carb gaskets. Make sure hoses are not cracked, cloged, or pinched.

Jun 17, 2009 | Troy Bilt Tb70ss Gas Trimmer

3 Answers

Replacing fuel tank on craftsman edger and other fuel lines.......do not understand where to hook fuel lines back up?  any diagrams?


ok If you have a Walbro WT series carb "without" a built on primer bulb here it is. First off if the fuel lines disintegrated you MUST disassemble it and clean it out. The MOST infintesimle speck of gas line trapped, can allow good prime and bad operation. OK? Don't be lazy on this. Just be delicate removing the flaps gasket and diaphram. ZAMA GND-12 Is the replacement Gasket and diaphram kit fot that carb. Use a cleaner, compressed air or blow good thru it. OK Now...Primer bulb, Carb, and Fuel tank, re connects: Smaller Diameter line comes from Gas tank (Connect filter screen to this in tank) to the short Straight brass carb connector. Primer bulb suction goes to the bent carb brass connector. If small line brings fuel "in" this other line sucks it back "Thru the primer bulb" and the blow side of the primer bulb sends it back to the fuel tank! So...Small Line brings fuel "TO/IN" carb thru short brass connect on carb. Other carb connect goes to bulb suction "IN", Then primer bulb "Pressure OUT" goes thru the larger tube "back to fuel tank". Trust me I know how frustrating a simple diagram is to find online fo this set up. And if you have a carb problem on top of the hook up uncertainty you got frustration. Not only was online help hard to find (Mfg...etc NFG at all!) My local repairshop in BBrook NJ could not tell me how!!! and thats no lie! Walbro has a "generic" carb diagram but no "hook up info" specifically. Poulan don't list it either. And these things routinly fall to pcs. all 3 of mine crumpled together on yr. 3 of use.

Jun 15, 2009 | Poulan 25cc 2-Cycle Gas Powered String...

4 Answers

Replacing a fuel line for a Poulan 2175 type 2 chainsaw


Take top cover off(3 screws). Take off the 2 nuts holding the carb on. Pull carb part way out to access the hoses. Remove the 3 old hoses after making a diagram of where they connect. Buy new hoses. Cut one end of the small hose on a bevel, pierce both sides 1/8 th inch from the end with a needle. Thread a thin wire through both holes. Thread both wire ends into the gas tank. Use a hemostat or long needle nose plyers to pull the wires and then hose down into the tank. Attach the weighted fuel filter. The other end of this smaller diameter fuel line goes on the upper nipple on the carb. Take the side cover off (4 screws) to access the primer bulb. Take 2 screws out to remove the bulb which has 2 nipples. The longer nipple connects to the larger diameter hose which goes to the fuel tank. The larger diameter tube has a coupler on the end which is inside the gas tank. It took me an hour to change all 3 hoses.
Bob

Jan 31, 2009 | Garden

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