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Gator 620i gas in engine oil
I have had three of the older style gators..the 6X4 mods NOT fuel injected but all had this problem. Newist one is a TH 2005 air cooled engine and it was the worst( gas in the oil ) The way I use them is short distance and shut off. We use them to work on the rancho here and this is how it is.
This problem used to drive me nuts and I always got the same BS from any JD guy I talked to about the problem.
This is what I surmised as the problem and solution for me.. 1 engine card set way too rich and not burning all of the fuel if the motor does not warm up. ( for years we just drove around with a set of spark plugs and a plug wrench in the glove compartment, develop ear for fouling plugs, change back plug frequently and check and change oil frequently.
however about two years ago I though about using the new spark plugs developed for ethenal fuels. SIGNIFICANT IMPROVEMNT. I wouldn't say the problem is solved but it is much better. We still drive aaround with spark plugs but the incidence of replacement is much less and I don't seem to be getting gas in the oil unless someone else drives it that is totally tone deaf and too lazy to replace the plugs. The plugs I am using are the NGK Ridium 6441. you may need a different plug for your engine. The plugs I buy are around $7 each so I bought a plug cleaner from HF much happier now...
However the reason I am on this board was to research the fuel injected gators... thinking maybe they would not have this problem. Boy was I wrong...
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Gator 620i gas in engine oil
I have had three of the older style gators..the 6X4 mods NOT fuel injected but all had this problem. Newist one is a TH 2005 air cooled engine and it was the worst( gas in the oil ) The way I use them is short distance and shut off. We use them to work on the rancho here and this is how it is.
This problem used to drive me nuts and I always got the same BS from any JD guy I talked to about the problem.
This is what I surmised as the problem and solution for me.. 1 engine card set way too rich and not burning all of the fuel if the motor does not warm up. ( for years we just drove around with a set of spark plugs and a plug wrench in the glove compartment, develop ear for fouling plugs, change back plug frequently and check and change oil frequently.
however about two years ago I though about using the new spark plugs developed for ethenal fuels. SIGNIFICANT IMPROVEMNT. I wouldn't say the problem is solved but it is much better. We still drive aaround with spark plugs but the incidence of replacement is much less and I don't seem to be getting gas in the oil unless someone else drives it that is totally tone deaf and too lazy to replace the plugs. The plugs I am using are the NGK Ridium 6441. you may need a different plug for your engine. The plugs I buy are around $7 each so I bought a plug cleaner from HF much happier now...
However the reason I am on this board was to research the fuel injected gators... thinking maybe they would not have this problem. Boy was I wrong...
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Gator 620i gas in engine oil
Does anyone know if the new 825s have this problem? I suppose that if the problem is my driving habits then it would reason that I would have the same problems. Maybe the new motor does not have this problem? ( oxy sensor ? ) I have looked and found some complaints about the 825 regarding the front end, but not gas in the oil... I bet that motor is not cheap to replace or work on. JD is probably the exclusive parts supplier! OUCH
BTW I would be very interested in the results if some 620/625 owners try the hotter spark plugs. If anyone tries it, please post me.
Thanks
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Gator 620i gas in engine oil
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Hotter spark plugs was a suggestion I made to the dealer, but with mine still having 2 years of warranty the last thing I want to do is tweak anything that would give them and out if something went wrong. I would think that would help whith burning all the fuel, the only problem I could think of would be during hard use creating excessive heat in the combustion chamber. It a fine line.
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Well if it goes kaput with the new plugs, you could always put your old plugs back in before you call the dealer.  But seriously, if it is taking on that much gas you have to wonder how long it will keep running anyway. I blew out a crank seal on my TH like one or two days after warranty was up... I had talked to them about the problems too. They would not stand behind the product. Now I need a new machine ... trying hard not to go Deere
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Gator 620i gas in engine oil
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I guess I have 2 questions related to this thread. Is it safe to say the HPX model does not have this issue? And anyone hearing about this problem in the EFI Kawasaki Mules?
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Don't know about the efi mule but apparently the carb ones do
http://www.kawasakimotorcycle.org/forum/kawasaki-atv-mule/20357-mule-3010-gas-oil.html
I am now going to assume it is just a matter of how they are used and not a problem specific to JD
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Gator 620i gas in engine oil
Hey guys .. this is an old thread but I am will to share my two cents.. I have had three of the 6x4 gators..( two currently ) I use them around the barn. All trips are short stop start trips. All of then had this problem. One has the air cooled engine.. it is the worst. I blew a crank seal out of that one about two days after warranty.
Don't ask me why I would ever by JD again but I have two of the 825s also now..LUV em..
But back to the other gator questions: Loooong story short;
First buy a box of hot plugs for it. On mine I have used NGK BPR2ES and NGK RIDIUM 6441
Second: buy a dedicated spark plug socket and ratchet to have in the gator at all times
Third: buy a spark plug cleaner ( Harbor Freight )
Develop an ear for when the plus are fouling.. If the gas is being fired.. you will not have gas in your oil...
Change those plugs frequently. if you have an ear for it. you will know when. I know this sucks but it is the only solution I have found and this works for me.
The knuckleheads at JD know about the problem but they "ain't gonna fix it"
Good Luck
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Gator 620i gas in engine oil
I have both the older 6x4 normal carb gators as well as the 825i injected gators. Had tons of problems with the carb gators washing gas down the cylinders. Were using those for very short runs. Absolutely NO HELP from JD. they pretended the problem didn't exsist and this was the first time they had ever heard of it. When i bought the EFI 825s we started using those for the short runs and now use the carb gators for work that allows then to warm up. Problem solved. Regarding your 620 / 625i, I have heard of all sorts of weird problems with them. Because it is EFI it should not be doing this. It has to be An EFI problem of some sort. It is seems Deere has all these units running way way too rich and they are all gas hogs. 825 included. That said, I absolutely love my 825s but have had problems with the one I bought used, it came with some injection problems.
I wouldn't hold my breath waiting on Deere to help. If your use is short run type stuff, particularly in cold weather, I would sell the 620 and get something else. 825i is a good choice IMHO others may be better, I cannot speak to that.
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Gator 620i gas in engine oil
PS before switched to the 825 gators we bought hotter plugs and swapped them very frequently.
In fact you can tune your ear to know when you are not getting a complete burn on the plugs and need to swap. I also bought a harbor freight plug cleaner and just rotated them out. I kept extra plugs and a plug wrench with the gator at all times. This got us through it.
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Gas Generator Weather Protecti
03-06-2011, 14:02 
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