If you own a John Deere lawnmower with a Briggs and Stratton engine...

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Supervisor42

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You may want to know this.
Models LA125, LA105 (there may be more) look like this:

The engine looks like this:
JohnDeereLA125Engine.jpg
They have a little secret.

I was raised up in the old days when an engine started using oil, smoking, and fouling the sparkplug it meant there was a problem with the piston rings, the piston, the cylinder or a combination of the three, and the engine was toast.
We have one of the above that was doing just that (used 1/2 quart of oil every time we mowed the lawn) and I was getting ready to order an engine for it ~$1,000.
By some stroke of luck, I happened to search YouTube.
And I learned something new.
It seems the engines have a design flaw.
One third of the cylinder doesn't have headbolts to hold the head tightly to the cylinder on the side the pushrods go thru.
Add this to the fact that this side of the cylinder doesn't have cooling fins:eek:, and you get what we have here today:
IMG_3135_e.JPGThe headgasket predicatively fails here pouring combustion gasses into the crankcase and blowing oil out of the PCV system into the carburetor and into the combustion chamber.
IMG_3139_e.JPG

Gasket set, $15:
Gasketset.JPGI fixed it's "drinking problem" and it is now a 'non-smoker' :D.
 
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Supervisor42

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Nice find and a great $$$$ savings
Actually, it's my father-in-law's mower, I just got tired of seeing the neighbors running for cover every time it came out of the garage.panic.gif
What little I know about mechanics:rolleyes:, most of them will fail because it is a composition gasket (this one only had 300 hours on it).

People don't think about where the smoke comes from, don't check the oil, and end up blowing the engine:

That's a lot of headache for a stinkin' gasket!go crazy.gifI think it's John Deere's way of making sure people buy a new mower every few years:(.
 
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The Lazy L

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My wife would never check the oil in the riding mower. I would come home and find the mower sitting on the lawn. I asked what happened and she would say it made a loud noise, stopped running and won't start. Yep blown motor. It happened 3 times. I'm retired now so I do the mowing.
My wife does things like that with our vehicles. I stop buying her cars!
 

Spikedriver

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@Supervisor42 do you know what model name Briggs & Stratton sells that engine under? I know Briggs makes some good ones (brother has an expensive zero turn that's 10 years old and going strong) and they make bad ones (I had a Poulan Pro with a B&S Intek that died after 400 hours). I'd like to avoid this model of engine altogether, regardless of which brand of mower...
 

Caribou

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My wife used Coleman fuel in one of our lawnmowers - once.
The house came with a walk behind and a riding mower. the gas walk behind was a bit of a challenge for her so I bought an electric Stihl for her. She keeps complaining that I won't let her use the riding mower. Her complaints are less of a threat than her on a riding mower.
 

Spikedriver

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The house came with a walk behind and a riding mower. the gas walk behind was a bit of a challenge for her so I bought an electric Stihl for her. She keeps complaining that I won't let her use the riding mower. Her complaints are less of a threat than her on a riding mower.
:LOL:

My kid has been banned from her grandpa's lawn tractor. She was trying to mow and ran into a tree. Not so unusual except the tree was the only obstacle for 100 feet in any direction and she hit it head on. Luckily nothing was damaged. I asked her if she was waiting for the tree to move out of the way? I got "the look" in response...
 

Supervisor42

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@Supervisor42 do you know what model name Briggs & Stratton sells that engine under? I know Briggs makes some good ones (brother has an expensive zero turn that's 10 years old and going strong) and they make bad ones (I had a Poulan Pro with a B&S Intek that died after 400 hours). I'd like to avoid this model of engine altogether, regardless of which brand of mower...
I only know the model number of the 21hp engine in the LA125 I worked on.
A little research quickly revealed the 19hp model in the LA105 also has the same problem.
The model number of ours is: 331877 full model number 3318770113B1 , build date 01-08.
I'm pretty certain these engines are used on other brands of mowers, I just don't know which ones:confused:.
As said in post #3, when the headgasket fails and if they don't check the oil, death is swift.
If we mowed just 4 times without adding oil, it would have run dry and self-destructed.ItNRkav.gif
 

Terri9630

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Where are you getting these cool emojis? I want them... @Angie? @Havasu??? Cool emojis please.
 

Supervisor42

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Where are you getting these cool emojis? I want them... @Angie? @Havasu??? Cool emojis please.
Talk Firearms...
and other cool ones that I have 'collected' / (scarfed) thru the years.
I got a sackfull.biggrin.gif
The problem is unless they are added to the collection, they take up their own line.PullingHairOut.gif gaah105.gif Of course, I spend most of my timeDrink4.gifso at the risk ofbdh.gif I'd say it may be a lightbulbidea.gif to add some to the pile, maybe?Thinking.gif
 

Supervisor42

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I wish we could just import them from the other forum?
Probably can. But it's gonna be a lot of hard work to get them hooked back up and working again though.3xpbg.gif
Or, Angie could just PM me her email address and I could send her a ZIP file of a directory full of smileysthumbsup.gifto have fun withmosh.gif (Which would still be a lot of hard work).clapslow.gif
 
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Angie

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