Question about Yard Machines 11A54MC006 21Inch 139cc MTD OHV Gas Powered Side Discharge

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139cc powermore 174 ohv engine reviews

Will only run with choke on...? Why???

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Posted on Jan 02, 2017

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rycgl
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SOURCE: yard machine 139cc ohv. wont turn over. cleaned

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.

Posted on May 24, 2011

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SOURCE: where to find the spark pug on my 21inch 139cc mtd

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!

Posted on Jul 18, 2010

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1 Answer

Powermore ohv


could be a number if things, dirty carb, old gas, dirty coil contacts, bad spark plug. First try replacing the spark plug and if it is old gas remove and replace with fresh. if that doesn't do it then the carb needs to be removed, cleaned and blown out thoroughly with an air compressor. reassemble and reinstall. next is to remove the recoil housing and clean the coil contacts. the coil is attached to the spark plug wire. remove and with some old gas or wd-40 and a wire brush, remove dirt and rust from contacts as well as magnet on the flywheel. be sure to leave the proper gap between the coil and flywheel when you replace the coil.

Jul 24, 2014 | Yard Machines 11A54MC006 21Inch 139cc MTD...

1 Answer

How do I replace the starter pull cord on a Yard Machine 21 inch rear bag mower


New "powermore" engine? recoil rewind starter comes as a complete assy. If the spring is broken this is your only option

Oct 28, 2012 | Yard Machines 11A54MC006 21Inch 139cc MTD...

1 Answer

139 cc ohv engine is racing how do I turn down the idle


get down and look at the carb. a little screw on top will allow you to adjust the idle, but;, check the choke, it is stuck in place or mal functuning maybe, but turning the screw right or left will set idle

Aug 07, 2012 | 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

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...

2 Answers

Yard man mower 139cc OHV spark plug


You can purchase a boot puller or take a pliers and grab exactly on top of spark plug and pull off. Some do stick on harder than others.

Aug 17, 2009 | Mtd 22" Yard Machine Push Mower

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