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Lawnmower gets hot and quits Sherman 07-15-2005
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Posted by JimL on July 20, 2005, 3:56 pm


On Wed, 20 Jul 2005 14:36:14 -0500, Duane Bozarth

>Sherman wrote:
>>
>...
>> >> > My 4 year old lawnmower gets hot and dies. ...
>> Rick says "Check the vent on the gas cap, too".
>>
>> Well, Bingo! Rick wins.
>>
>> After checking for spark after it died, and getting a positive
>> response from my wife on spark, I replaced the spark plug cap and
>> reached up untwisted the gas cap off a 1/4 turn and it started on the
>> first pull.
>>
>> Now, I looked and I don't see any hole in the gas cap for it to vent.
>> I hate that she has to mow with the gas cap not tight. She might
>> catch the mower on fire. I'd hate to lose that old mower.
>>
>> Do I just drill a small hole in the cap?
>
>It's a four-year old mower and <now> a non-vented gas tank is the
>problem? Don't think so... :)
>
>Mayhaps the vent is plugged, but I'm still not convinced...there's got
>to be an existing vent if that is the problem or it wouldn't ever have
>run reliably...

The cap is hard rubber with a rubber washer that has 2 small holes
in it. Behind the 2 holes is another flat thin rubber washer that has
deterioated and the deteriorated rubber is actually protruding
partially thru the tiny holes. I suspect it completely stopped up
the vent holes.

I tried removing the deteriorated rubber, but can't really get to it.
If she comes in bitching about the mower dying again, I'll add a new
vent hole thru the cap.







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Posted by Edwin Pawlowski on July 20, 2005, 11:26 pm



> If she comes in bitching about the mower dying again, I'll add a new
> vent hole thru the cap.

Seems like a lot of work for one guy. She's cutting the grass so it is her
responsibility to take care of the dammed thing. Tell her to drill the
hole.

Be sure to report back with the results when you do!




Posted by Doug Miller on July 20, 2005, 11:33 pm


>
>> If she comes in bitching about the mower dying again, I'll add a new
>> vent hole thru the cap.
>
>Seems like a lot of work for one guy. She's cutting the grass so it is her
>responsibility to take care of the dammed thing. Tell her to drill the
>hole.
>
>Be sure to report back with the results when you do!

Ed, he won't be able to sit down to type with that drill up there...

--
Regards,
Doug Miller (alphageek-at-milmac-dot-com)

Get a copy of my NEW AND IMPROVED TrollFilter for NewsProxy/Nfilter
by sending email to autoresponder at filterinfo-at-milmac-dot-com
You must use your REAL email address to get a response.




Posted by Sherman on July 21, 2005, 12:46 pm


On Wed, 20 Jul 2005 14:36:14 -0500, Duane Bozarth

>Sherman wrote:
>>
>...
>> >> > My 4 year old lawnmower gets hot and dies. ...
>> Rick says "Check the vent on the gas cap, too".
>>
>> Well, Bingo! Rick wins.
>>
>> After checking for spark after it died, and getting a positive
>> response from my wife on spark, I replaced the spark plug cap and
>> reached up untwisted the gas cap off a 1/4 turn and it started on the
>> first pull.
>>
>> Now, I looked and I don't see any hole in the gas cap for it to vent.
>> I hate that she has to mow with the gas cap not tight. She might
>> catch the mower on fire. I'd hate to lose that old mower.
>>
>> Do I just drill a small hole in the cap?
>
>It's a four-year old mower and <now> a non-vented gas tank is the
>problem? Don't think so... :)
>
>Mayhaps the vent is plugged, but I'm still not convinced...there's got
>to be an existing vent if that is the problem or it wouldn't ever have
>run reliably...

You are right. The vent is plugged.


The cap is hard rubber with a rubber washer that has 2 small holes
in it. Behind the 2 holes is another flat thin rubber washer that has
deterioated and the deteriorated rubber is actually protruding
partially thru the tiny holes. I suspect it completely stopped up
the vent holes.

I tried removing the deteriorated rubber, but can't really get to it.
If she comes in bitching about the mower dying again, I'll add a new
vent hole thru the cap.




Posted by Stormin Mormon on July 15, 2005, 12:48 pm


Sounds like a valve clearance problem to me. Either that, or the fuel line
is too close to the engine. But more likely valve clearance.

I took a small engine repair course years ago. To fix this, you have to take
off the motor cover, the cylinder head, and then remove both valves. Grind a
little off the bottom, ch eck the clearance, and put it back together.
Requires some specialized tools, and some replacment gaskets.

--

Christopher A. Young
Learn more about Jesus
www.lds.org
www.mormons.com


My 4 year old lawnmower gets hot and dies. I can mow for 15 minutes
and it coughs and sputters and then shuts down completely and will not
restart - for 15 minutes. Then it will start and runs another 10
minutes.

Seems to be a heat related issue. I cleaned out the debris and
replaced the spark plug. No change.

What could be wrong and how do I determine it?

Sherman




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