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John Deere gators


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#1 Cjet69 ONLINE  

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Posted March 20, 2017 - 10:21 PM

Just bought 2 JD gators this evening. I'll get picks when I pick them up tomorrow.


Edited by Cjet69, March 20, 2017 - 10:22 PM.

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#2 Cjet69 ONLINE  

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Posted March 21, 2017 - 08:54 PM

Brought the gators home this evening.

 

100_6699 (Medium).JPG 100_6703 (Medium).JPG


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#3 KennyP ONLINE  

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Posted March 22, 2017 - 04:54 AM

They look stout!


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#4 Alc ONLINE  

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Posted March 22, 2017 - 05:16 AM

Nice !   We have two here at work that they use on-site in the training center .  Been pretty much trouble free


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#5 Cjet69 ONLINE  

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Posted March 22, 2017 - 12:31 PM

The Gator with the windshield has a seized engine. The other one seems good, but has no spark. I hope I can just juggle some parts around and get one running. Then evaluate what's left and decide if the other can be saved.



#6 Cjet69 ONLINE  

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Posted March 22, 2017 - 05:11 PM

I did a little work on the gator engine that isn't seized. Check oil, spark, and fuel to carb. Everything was good so I tried to start it. Fired right away on starting fluid, but wouldn't keep running. Pulled the carb and found gunk plugging the jets. After a quick cleaning tried it again and it runs, but only on one cylinder. Cleaned the plugs and it seemed to pick up the other cylinder for a bit and then it dropped out again. Figure I will try a compression test next. Maybe I should pull the rocker cover first just to check things out.



#7 Cjet69 ONLINE  

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Posted March 22, 2017 - 08:00 PM

I checked compression and found both cylinders at 100#. Tried swapping the plugs side to side and the same cylinder wouldn't fire. Swapped a coil no change. Swapped igniter box same thing. I did remove the rocker cover and while rolling over by hand the exhaust valve seemed to stick and snapped shut. I was able to get it to do that one more time and then it seemed to work fine. Not sure what's going on there.



#8 Cvans ONLINE  

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Posted March 22, 2017 - 11:59 PM

Dirty valve stems. Dump some Marvel Mystery Oil into your gas if you can get it to keep running. Carbon build up on the valve stems causes them to stick in the guide or not close all the way all the time. The MMO will remove the carbon and help lube the valve stems.


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#9 Cjet69 ONLINE  

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Posted March 23, 2017 - 12:05 PM

Dirty valve stems. Dump some Marvel Mystery Oil into your gas if you can get it to keep running. Carbon build up on the valve stems causes them to stick in the guide or not close all the way all the time. The MMO will remove the carbon and help lube the valve stems.

 

I'll give it a try.


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#10 pick-to-stone OFFLINE  

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Posted March 23, 2017 - 04:25 PM

Looks fun
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#11 toppop52 OFFLINE  

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Posted March 23, 2017 - 07:36 PM

Sea Foam will also clean them up, fairly quickly.
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#12 Cjet69 ONLINE  

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Posted March 23, 2017 - 09:14 PM

Did some reading on checking compression. Found that they list throttle open and closed pressures. The first time I checked was with the throttle closed so I opened it up and checked again. This time both cylinders were 150lbs. Still can't figure why the one cylinder won't pick up and run. I decided to check for a blockage in the intake and exhaust. Thought I found blockage in the muffler, but after removing it was clear. Fired it up without exhaust and found the dead cylinder would pick up with about 1/2 to 3/4 choke, but wasn't consistent. If I open the choke it would drop the cylinder again. Not sure what is going on here. Seems like all of the ingredients are there to run, just won't.


Edited by Cjet69, March 23, 2017 - 09:15 PM.


#13 Cvans ONLINE  

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Posted March 23, 2017 - 09:17 PM

Crack or gasket leak in the intake manifold. Loose bolts on the manifold. Is this a split manifold with each cylinder having it's own circuit in the carburetor? 


Edited by Cvans, March 23, 2017 - 09:20 PM.

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#14 Cjet69 ONLINE  

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Posted March 23, 2017 - 09:52 PM

Crack or gasket leak in the intake manifold. Loose bolts on the manifold. Is this a split manifold with each cylinder having it's own circuit in the carburetor? 

 

Hadn't thought of that one, but will give it good look tomorrow.

 

Edit: single bbl carb


Edited by Cjet69, March 23, 2017 - 11:02 PM.

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#15 Cjet69 ONLINE  

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Posted March 23, 2017 - 09:53 PM

The gator that I was told was seized up wasn't. I put a wrench on the flywheel nut and turn it over. Felt a little stiff so I put some ATF/Acetone mixture in the cylinders and it seemed to loosen up quite a bit. Dad said he wanted to try to start it. Good news, it fired up. Bad news it only lasted about 2 minutes. Now its locked up again.

 

https://www.youtube....h?v=XbQiq0eDs-w


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