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If it's fuel injection, I'd stay way from it. Just read all the "gas in the oil" postings. I'm fighting problems on a 2010 Gator 620i with the Kawasaki FD 620D-CS26 engine and I only have 360 hours on it. First had problems at 150 hours when engine ran erratic and idle was bad. There was gas in the oil. Then had to replace fuel pump at 300 hrs. Now at 360 hours it coughs and sputters when press on gas, then speeds up and slows down when holding gas peddle at constant position. Like it's gets a shot of gas, then when engine almost dies gets another shot of gas. I've run test that the dealer has suggested, but unable to locate the problem. In less than 10 hours after oil change the oil is more than 1/2 inch above full mark. Beware !

6x4 engine rebuild
Utility Vehicles UTV/ATV
Replies 6 Post by berryday38

Have a 2010 Gator 620i with fuel injection. At 150 hrs it started stuttering and running rough and had gas in the oil. Per instructions from dealer I took throttle body apart and sprayed with JD Carbon and Choke Cleaner and started putting Sea Foam in the gas. Also installed new plugs - BPR2ES. Gator then ran fine but was still getting some gas in oil. At approx. 300 hrs the dealer replaced Fuel Pump and Fuel Filter as it was making a squealing sound. After that was running good but had to change oil every 30 hours because oil up above full mark 1 inch due to gas in oil. At 355 hrs it started running rough again. I've tried to clean the throttle body assy as before, put in new plugs but still not running good. Not same roughness as before. Now it coughs and sputters when start it, but hasn't died yet. When push on gas peddle it also coughs and sputters. When moving at a steady speed and holding the gas peddle steady the Gator engine speeds up and then gradually slows down to almost an idle then speeds up again, even though haven't moved gas peddle. It keeps doing this at about 5-8 second intervals. Sounds like not getting gas. I thought maybe the fuel filter was partially blocked and was going to change it out. However I took off the gas hose going to the throttle body assy and it's pumping out a good stream of gas when you turn the key on. Apparently some sensor is not working right. Any help would be appreciated. I'm not happy with this John Deere Gator and obviously I'm not the only one having problems. Thanks for any suggestions.

Gator 620i gas in engine oil
Utility Vehicles UTV/ATV
Replies 54 Post by berryday38

Problem was the fuel pump. Had to take it to the dealer to replace it and the fuel filter as couldn't get a wrench into it to remove the pump. They changed the mount so next time I'll be able to get to it.
Now have the engine running erratic even though I'm using Sea Foam in the gas. Tried spraying carb cleaner into the fuel injector assy which helped a little . Just changed out the plugs and shot in some more fuel cleaner. So far sounds much better. Getting lots of gas in the oil. Sure disappointed with John Deere.

Squealing sound from engine
Utility Vehicles UTV/ATV
Replies 7 Post by berryday38