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Discussion Starter · #1 ·
Hello all,
I was wondering if anyone else had this specific problem I am having. I started cutting grass today and after about 2-3minutes, the lawn mower stopped and let out some minor smokes. After cooling it, the lawn mower failed to start. One of its symptoms that I think is causing this failure is the lock mechanism for pulling on the rope is gone. So regardless of if I hold down the bar or not, I was still be able to pull on the rope. However, the rotation was noticeably less smoother when not holding down the bar as expected. Other symptoms that I discovered today are dirty filter and a small crack on the metal part near the engine oil reservoir (there was a small leak of oil after I put some in today). I don't know how or when the crack got there. One more thing to mention, as I was cutting the grass, the sound my lawn mower made became progressively higher in pitch before stopping.

Any suggestions would be appreciated. Thanks.
 

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You may have spun a bearing, seized something up or threw a rod??? What does the oil look like? Does it even turn over? Does it have compression? A crack in the block could mean something on the inside may have hit it. Try those out and see where that takes you. Good luck and let us know!
 

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Discussion Starter · #3 ·
I'm mechanically challenged. The first time I've ever disassembled a lawn mower was today. Can you explain a little more in detail?
 

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You may have spun a bearing, seized something up or threw a rod??? What does the oil look like? Does it even turn over? Does it have compression? A crack in the block could mean something on the inside may have hit it. Try those out and see where that takes you. Good luck and let us know!
Not a problem,
Check your oil, is it black, full of glitter, if so you are making metal ( things are wearing out bad or are pretty much gone!)
Is your oil milky like chocolate, (Water in the oil) maybe your mower goes uncovered outside and the oil broke down causing engine failure.
Can you even turn the engine over. I'm not talking about starting, just turning it over or does it at least spin? If not the engine is locked up. replace or rebuild.
Spun bearing means the bearings in your engine have worn so thin that they come out of place and get wedged in the crankshaft or rod and causes loud squeals or jams the engine up all together.
Cracked engine, something breaks free inside and slams against the inside of the block and cracks it like a piston rod or a push rod in the engine head.

You can check for compression by taking the spark plug out and putting your finger OVER the hole not in it and turning the engine over and it should push your finger off a little with the air pressure. This is not for checking compression for manufactures specifications just to give you a general idea if any compression is present. If there is none, the piston may not be moving because of a broken connecting rod or even a hole in the piston which could also be caused by a broken/ dropped intake/exhaust valve.

Hope that helps a little
 

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Discussion Starter · #5 ·
the oil looks suspicious. I uploaded a pic.Image - TinyPic - Free Image Hosting, Photo Sharing & Video Hosting

the engine spins fine. However, it is missing the locking mechanism when not holding down the bar.

I checked for air compression and it was hard for me to turn the engine over due to the leak. I got it to turn 90 degrees but no air pressure.

if the engine failure was caused by the oil, what are the chances of fixing the lawn mower?
Thanks.
 

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If you don't mind, could you take some pics of the crack area and the engine area, I think the main case/block is toast
 

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Discussion Starter · #7 ·
sorry the camera quality is not the best.
Here is the link to the album. ImageShack Album - 8 images

Another thing I noticed was when I tried to pull and start the engine, it almost felt like it was going to go through (I could feel the vibrations).
 

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Looks like your engine case is shot, even if it did start it would spew oil under the pressure. It will probably act like it wants to start simply because its still getting fuel and spark but it wouldn't last long. Something happened inside like a main crankshaft bearing spun and forced the case out enough to crack it. if you looked in your spark plug hole you may be able to see your piston move. If it does you may not of thrown a connecting rod but at this point its pretty much Kaput. You could take it apart to learn with it and see why it failed but you'll probably be looking for a new or used engine or mower. Sorry about that.
 

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fixer

you Sir are the victim of classic rod failure. plan on replacing with a new or used engine.good luck on repair.
 
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