Question about Yard Machines 11A08MB006 22Inch 139cc MTD OHV Gas Powered Side Discharge

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What is the approximate hp of this engine-139cc??

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1 Answer

A briggs and stratton 547cc equals what hp


CCs can't be directly correlated to HP. They are measuring different things. It depends on how the engine is tuned. You can approximate that small engines 1 HP = 30 - 32 CC, car engines are usually 1 HP = 15 - 17 CC. So, 16.5 HP or so.

Mar 22, 2017 | HP Measuring Tools & Sensors

1 Answer

Mtd 139cc ohv engine will start with primer, but stalls within two or three seconds


Ensure oil is full. Engine has a low oil cutoff. 30w oil. Replace carb only about $27.

Jul 11, 2013 | Mtd Garden

1 Answer

Is this machine's engine a 2 stroke or 4 stroke


If the engine doesn't have a sump and oil filler cap, it is 2 stroke.

Aug 09, 2011 | Yard Machines 11A54MC006 21Inch 139cc MTD...

2 Answers

Crazy question but where is the primer button on the yard machine 139cc 21" lawn mower???????


The primer button is usually on the carburator of your machine. Most of the time on the side of the carburator , but sometimes on the front of the carburator. GOOD LUCK.

May 29, 2011 | Yard Machines 11A54MC006 21Inch 139cc MTD...

1 Answer

Yard macine model 139cc will not start. Has gas and oil... where is the spark plug located on the lawn mower? I would like to replace it.


The spark plug is at the end of the thick black wire in the middle of the front of the engine or looking at the mower from the front, it is to the left of center. Make sure you set the spark plug gap before installing it new. The gap is probably around .030". They have tools for doing this at the auto parts store. Sometimes and older plug can be cleaned with a stiff wire brush and some solvent and gapped properly and continue to work well.

May 28, 2011 | Yard Machines 11A54MC006 21Inch 139cc MTD...

1 Answer

Yard machine 139cc ohv. wont turn over. cleaned carb and bowl. bowl gets gas but gas wont get into carb . think poss vacuum problem


Clean the brass bolt very well that holds the bowl on the carb. Pay very close attention as their are some very small holes in the smooth part of the bolt near the top, as well as the bottom. Use NO metal objects to clean this bolt.It is the main jet of the carburetor also. Once cleaned properly, your fuel flow into carburetor and engine should be restored.

May 24, 2011 | Yard Machines 11A54MC006 21Inch 139cc MTD...

1 Answer

My 3 year old Yard Machine 139cc started (choke out), but then began running excessively fast after pushing the choke back in. A few weeks later, it still started (choke out) but now ran very fast even...


Check the carburetor see if all the bolts are tight.check the cylinder head gasket take off plug wire make sure it is away from plug so it wont start. Pull start rope can you hear air being pulled into the engine? if so the head gasket has ruptured or head bolts came lose. Ensure all parts are tight. Ensure fuel lines are not clogged. Check fuel level.

Sep 11, 2010 | Yard Machines 11A54MC006 21Inch 139cc MTD...

1 Answer

Where to find the spark pug on my 21inch 139cc mtd ohv lawn mower


It should be under a rubber boot between the valve cover *(stamped OHV or OHC) and the muffler.

Good luck and be careful. Dont pull that boot when the engine is hot!

Jul 07, 2010 | Yard Machines 11A54MC006 21Inch 139cc MTD...

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