Question about Mtd Yard - Man 160cc, 21" Self - Propelled Lawn Mower

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My lawn mower starts easily, then shuts down. each time I prime it, it strts again easily, then stops. If i continually prime it, it will keep running. any ideas?

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Change the primer bulb it got a air leak

Posted on Jul 17, 2012

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Disassemble the carb and make sure the float valve is not sticking

Posted on May 10, 2010

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2 Answers

Mower starts easily, but runs 10 seconds and quits.


Carburetor needs to be cleaned; main jet is clogged with debris, dirt, whatever.

Jun 23, 2015 | Garden

1 Answer

Dynamark 3.5 Model 20211X18A. Looking for manuel, I prime 2 times to start. Engines starts then dies. If I continue to push prime button it will keep running, barely, however, dies as soon as I stop...


Could be 2 things: a restriction in your fuel line/coming out of the tank, or 2: a dirty carburetor needing to be removed, cleaned and possibly rebuilt and reinstalled. Hope it's one of those.Start with pulling the fuel line loose from the carburetor. If you have fuel flowing freely, plug the hose with a golf tee and move onto removing the carburetor. Carb kits are cheap and easy to install. It's best to rebuild while you have it off to avoid similar problems later.

Sep 30, 2013 | Briggs & Stratton Briggs Stratton...

1 Answer

I bout a 22" push mover last year.The priming bulb on this has been torn and it is difficult to start it.It should not tear or get damaged so easily.Please help. Harjinder S Sabherwal


I agree the priming bulb should be more robust or somehow protected. You could replace the bulb, but soon have the same problem again. A simple work-around is to buy a can of spray instant-start (spray ether sold in auto parts stores). Spray this into the air filter each time you start the mower cold, thus avoiding the need to prime it.

Aug 27, 2010 | Mtd 22" Yard Machine Push Mower

1 Answer

Morrison 1400W electric lawn mower goes for 20 secs.


I would think that switch may be faulty? Or is it a momentary switch only?, if so, then you have an input to the controller problem, insomuch as it starts, runs, for some reason thinks there is a problem & shuts down, whereby the switch is being pressed, so it "Sees" this and starts again, and so on?

Mar 04, 2010 | Garden

1 Answer

Lawn mower starts and stops right away


take bowl off bottom of carb....clean and reassemble

Nov 16, 2009 | Garden

1 Answer

Wont continue to run after prime and start


often the last ounce of gas in the tank has some crud in it. Get a can of carbeurator cleaner spray. Remove the air filter and squirt three short bursts of the cleaner spray into the air port and then start it. Keep giving it short bursts of carb. cleaner until it runs smoothly again.

Aug 12, 2009 | Troy Bilt 5.5hp Self Propelled Mower

1 Answer

Mower starts up after priming, runs for a few minutes then shuts off. Starts again after priming......runs a little then shuts off.


The carb needs to be taken off and cleaned. The ethanol in gasoline absorbs water and causes problems. Disassemble carb and clean with carb cleaner.

Jul 18, 2009 | Garden

1 Answer

6 yr old mower starts, won't run


sounds like a plugged high speed jet in carb - you can attempt to prime again , push at least 7-8 times - once it fires continue to push primer to keep running - it may clear out the carb if this doesnt work the carb will need to be removed and cleaned

Sep 27, 2008 | Garden

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