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Old 03-12-2013, 08:02 PM   #1
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Lawn Mower can't start


I have a Yard Machines (by MTD), not used for a while but now it can't start.
I replace the spark plug, air filter and still not solve the problem.
5.5 HP, 21 inch cut
MTD model: 11A-416Q729.
It worked fine before and just long time not using.
What's wrong with it?
Anybody knows? Please help.


Last edited by rliu; 03-12-2013 at 08:03 PM. Reason: typo
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Old 03-12-2013, 08:31 PM   #2
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Lawn Mower can't start


I moved this to 'small engines /tractors"---Mike----

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Old 03-12-2013, 08:34 PM   #3
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Lawn Mower can't start


Are you getting spark? Sometimes rust on the flywheel will cause the magnito to malfunction.

That's a bit of work to fix--so see if the spark plug wire is getting juice---
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Old 03-12-2013, 09:19 PM   #4
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Lawn Mower can't start


Need a whole lot more info.
Start from turning the key, what happens.
Big differance from does nothing when key is turned and turns over but will not start.
Still got old gas in it?
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Old 03-12-2013, 09:38 PM   #5
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Lawn Mower can't start


Quote:
Originally Posted by rliu View Post
I have a Yard Machines (by MTD), not used for a while but now it can't start.
It worked fine before and just long time not using.
pour some seafoam into the gas tank and some down the throat of the carb
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Old 03-12-2013, 10:13 PM   #6
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Lawn Mower can't start


If it can't start, you may as well throw it away.
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Old 03-12-2013, 10:34 PM   #7
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Lawn Mower can't start


Sorry, I really don't know how to post my thread to certain folders in this forum.

My mover is just works fine and can feel that it needs a little energy to start but I don't know how to adjust it. New Spark Plug, new filter. I think it is no spark when pulling the string.

It is a not too old mower. Yard Machines (by MTD),
5.5 HP, 21 inch cut.
MTD model: 11A-416Q729.
It worked fine before and just long time not using.

Anybody knows? Please help.
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Old 03-12-2013, 10:41 PM   #8
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Lawn Mower can't start


Works fine, but no spark? Hmm.
If there was no spark it would not run.
99% of the time the carberator needs to be removed and rebuilt.
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Old 03-13-2013, 03:53 PM   #9
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Lawn Mower can't start


Quote:
Originally Posted by rliu View Post
Sorry, I really don't know how to post my thread to certain folders in this forum.

My mover is just works fine and can feel that it needs a little energy to start but I don't know how to adjust it. New Spark Plug, new filter. I think it is no spark when pulling the string.

It is a not too old mower. Yard Machines (by MTD),
5.5 HP, 21 inch cut.
MTD model: 11A-416Q729.
It worked fine before and just long time not using.

Anybody knows? Please help.
If it will not start at all, after not running for quite awhile, it's almost a guarantee that your gas got old & plugged up your carb.

Usually you can drain out the old gas, and put in new. Remover the air cleaner and give it a shot of starting fluid (you can buy this for about $4 at any auto parts store). It should start, run really rough for a bit, but smooth out.

If you get it running, add a little SeaFoam to the gas. It will clean up the carb.

If you do NOT get it running, let us know & we can go from there.


In the future, before you stop using your mower for the winter, add a little bit of SeaFoam.
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Old 03-16-2013, 02:54 AM   #10
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Lawn Mower can't start


Thanks. I sprayed the Quick Fluid to the Carb. and the engine started running but stopped immediately. The oil or gas or combination of both was spreaded (pushed) out from the exhaust window when engine was running short time. Is it the problem of engine oil leaking or something else. Should replace the engine oil? How to drain it? Where is the leak. How to fix it?

Last edited by rliu; 03-16-2013 at 03:04 AM.
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Old 03-20-2013, 07:29 AM   #11
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Lawn Mower can't start


Its the carb from running ethanol gasoline after setting all winter messes carb up
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Old 03-20-2013, 10:00 AM   #12
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Lawn Mower can't start


Quote:
Originally Posted by William A View Post
Its the carb from running ethanol gasoline after setting all winter messes carb up
That is not true.

Non-ethanol gas does the same thing.
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Old 03-20-2013, 03:19 PM   #13
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Lawn Mower can't start


Quote:
Originally Posted by rliu View Post
Thanks. I sprayed the Quick Fluid to the Carb. and the engine started running but stopped immediately. The oil or gas or combination of both was spreaded (pushed) out from the exhaust window when engine was running short time. Is it the problem of engine oil leaking or something else. Should replace the engine oil? How to drain it? Where is the leak. How to fix it?
Ayuh,... The Carb needs to be removed, 'n Rebuilt....
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Old 03-25-2013, 07:08 PM   #14
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Lawn Mower can't start


Just take it to a mower repair shop, for goodness sakes. The EXHAUST WINDOW???? C'mon man you are over your head!

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