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Bought a new house on about a half acre lot and got a new John Deere D 110. I mistakenly overfilled the engine with my fist oil change by about 1/2 a quart. After mowing for about 20-30 minutes it back fired a couple times and billowed white smoke. I put the mower up and tried again the next day. After about 20 minutes it back fired and billowed white smoke again. I now realize that I had overfilled the oil. I've drained some and all seems to be fine now. Do you think I did permanent damage running it about an hour overfilled?
 

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I highly doubt it. We did that to our gator by accident. (Checked Oil on a Hill) :lol::lol:

The service tech said that is a safety system it has a relief valve somewhere that lets it run into the muffler and when it gets hot enough it burns it off. So yeah I doubt you caused any damage it probably just dumped that extra oil off. You may still get some white smoke and residual oily burning smell but that will go away soon enough. Our gator has no ill effects from that particular incident.

Though we did have the dipstick jump out one time that was interesting it ended up getting the throttle stuck. But thats another story, anywho moving along :p
 

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Long tern it is not good to do. In this case I can't imagine you damaged anything. You may want to check you spark plugs. Sometimes they foul out a bit if you over fill like that. If they are pretty oily or black change them.
 

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Welcome to GTT Swampfish. Seems you're in good hands.
 

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Oh yeah. :wgtt:

As said above just check the spark plug. But for just like an hour it should be ok.
 

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As others have said, it's doubtful that you did any real damage. In my experience, you'll find out how well she holds up when you put some real stress on the engine. As long as you didn't do any damage to the oil control ring(s) the motor should be fine. Ring damage is usually apparent fairly close to the timeframe of initial trauma. I worked on an old Briggs tractor engine (old Snapper tractor) that rolled down a hill and ran for a bit while smoking like a brush fire, it held up for the long haul. A newer engine in a hand mower that was run with the oil full to the top of the dipstick didn't fair so well, broken oil control ring... It all depends.


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Keep in mind that pretty much all of us have made this mistake at one point or another, so don't worry about it at all. I always try to under fill if on uneven ground as most engine capacities have wiggle room to be under filled without issue.


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I agree with those posting above that you likely caused no long term damage. Often, excess oil in that type of engine can be "whipped" into a foamy like froth when it is coming in contact with engine rotational pieces like crankshaft counter weights, etc. Over an extended period of time this obviously diminishes the lubricating qualities of the oil, but I am talking about several hours of continuous use.

As little as you ran this, other than checking and possibly changing the spark plug, I doubt you caused any other problem.

Live and learn, we all do it!

My neighbor with a new D series had been mowing for about one hour when he noticed I was outside. He drove over and opened the tractor hood and was asking me questions about various things. He pointed at the cap on the oil drain pipe and said "What does this do?" as he twisted it and promptly proceeded to drain the engine oil right in the middle of the yard. I quickly put it back on, but by then enough oil had been lost that we changed the oil right then and there.

It did take about three weeks for the burn to heal which I got from reinstalling the drain plug cap and being burned by the very hot oil. Putting the cap back on was more of a reflex than anything. But that is how we all learn. I was quite surprised how easy that cap was removed by simply twisting it with fingertips.......:unknown:
 
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