Question about Yard Machines 158cc Push Lawn Mower #11a 034f200

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158cc yard machine, starts then dies.

This does not have a throttle just a primer. if i keep pushing the primer it will stay running.

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Your fuel tank and carb need to be removed, both cleaned and replace pump diaphragm between carb and tank. If you want to do it yourself, let me know and I;ll tell you how. Not a difficult job. Dwain

Posted on May 26, 2009

  • robert barrett May 09, 2013

    Yes... Please tell me how. Bob...

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New MTD Yard Machine with 158cc briggs worked great but after only using it 2 times now it will start but quits after primer gas is gone (about 1 or 2 seconds). Does this repeatedly.


Running only on the prime is caused by the main jet in the carburetor being blocked. This can happen if you put dirty or old fuel in it or let it sit for a long time with fuel in it. Today's ethanolated gas goes bad quickly and absorbs tons of moisture which causes water to settle to bottom of the fuel tank, which in turn prevents the main jet from lifting fuel, it picks up water instead, thus causing it to die. So, check the tank for water, drain. Check the gas can, and get rid of the old stuff. If debris in either of them, you may have to take carb apart to clean the main jet.

Sep 15, 2011 | Mtd Products Yard Machines 158CC Tiller

1 Answer

I have a yard machine mower model number 11A-549R729 that will not stay running. Have replace plug,drain fuel tank and clean carb. If you push the primer bulb it will continue to run. But once you stop...


Your carbs main jet is blocked. Using the primer supplements the fuel input and keeps the engine from becoming fuel starved.

You need to remove the main jet and run a strand of fine wire through the jet to clear it.

Aug 17, 2010 | Yard Machines 158cc Push Lawn Mower #11a...

2 Answers

Starts but doesn't stay running


carb needs cleaning and also replace air filter

May 15, 2010 | Mtd Products Yard Machines 158CC Tiller

1 Answer

Edger will not stay running


Your diagfram is bad replace it in your carb and you will be ok

Apr 12, 2010 | Yard Machines Red Edger

1 Answer

My yardmachine snowblower won't stay running. It starts if I pump the primer. Fires up than dies. The fuel line isn't clogged, but once it starts it seems like the throttle cable has no tension (floats...


empty the fuel bowl & tank. start out with fresh fuel for one. then get a new spark plug if it still dont start. as far as the cable thats another deal completely but it shouldnt cause it to stall out. but if it ran last year it will this year too. always run it empty for summer storage. its your personal choice if you use a summer storage lubricant.

Feb 09, 2010 | Mtd 22" Yard Machine Push Mower

1 Answer

"how do i change the primer bulb on my yard machine lawn mower"


You should be able to remove the old one with a screw driver or needle nose pliers. The new one should have a new gasket with it.

Jun 17, 2009 | Yard Machines 158cc Push Lawn Mower #11a...

1 Answer

Tiller won't stay running


If you choke or prime the engine, it starts up for a second or two and dies, the carburetor need to be cleaned/repaired.

May 25, 2009 | Mtd Products Yard Machines 158CC Tiller

1 Answer

Won't stay running


Check the oil level. It may be overfull. If so, a carburetor problem may be allowing fuel to get into the crankcase.

May 18, 2009 | Yard Machines 158cc Push Lawn Mower #11a...

1 Answer

Can't keep mower running without consistently pushing the primer.


It sounds like there is water in the gas. The only way to remedy this is to take the carb off of the gas tank and replace the diaphragm, there is a small reservoir between the tank and carb...clean with WD-40 to remove water

Apr 05, 2009 | Mtd 22" Yard Machine Push Mower

1 Answer

Mower won't run....starts then stops


lawn mower only starts if i prime it. yard machine push mower. m/n 11a-549q229

Mar 01, 2009 | Yard Machines 158cc Push Lawn Mower #11a...

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