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 10-31-2009, 15:17 Post: 166633
badnova



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 JD Gator only runs with choke

I just picked up a used 4x2 from a friend and it only runs with choke 1/2 way (it will run without but once you give gas it dies). I have pulled the carb/jets etc and cleaned everything with carb cleaner and compressed air (carb was really dirty). this didn't seem to help.

I did notice the pilot jet (what i suspected was causing the problems) was a bit plugged so i ran wire through all the hole but noticed the main hole that runs through the jet appears to be blocked - which tells me it probably isnt getting enough air from outside the carb - but it looks like from the top of the jet that is has a piece of small round silver metal plugging the hole - is this normal? should i try to drill it out with a jet drill bit ?

I also noticed this jet is a #42 is that the right jet for my altitude in iowa? (i think this is a high alt jet)

sorry for so many questions, dont have a service manual yet






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 10-31-2009, 22:33 Post: 166642
badnova



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 JD Gator only runs with choke

Quote:
Originally Posted by gatoraider | view 166641

[QUOTE=gatoraider;166641] If you need the choke to make it run you need more main jet. Iam assuming you are saying that when you run it at speed it will run better with the choke pulled part way out.

Yes, although it still has a bit of low throttle stumble to it

What main jet is in it? Probably in the 80s somewhere. It needs a 90 or 91. 42 or 45 sounds right for a pilot jet.

I think the main is an 82

You should be able to blow carb cleaner thru the bottom of the pilot jet using the plastic nozzle provided.

nope. the smallest hole at the bottom is open (really tiny) but the end with the screwdriver slot is only open down to about an 1/8th of an inch - then i see some shiny silver (looks like a perfectly fit plug) in it - should this be there (i assume not?)

End holes are much smaller than the side holes.If you have to use wire to open it up use the smallest wire in a tourch tip cleaning set. [/QUOTE]






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 11-01-2009, 21:06 Post: 166656
badnova



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 JD Gator only runs with choke

cant thank you guys enough for all the help here...Thanks

yep the springs are all there. one thing i noticed when just running it (no load) and reving it up etc that the throttle butterfly connection to the linkage seems to want to bounce around a bit - especially at higher rpms.. does that indicate anything? as it is now if i start the gator and put it in gear and try to drive it will fall all over it self, if i pull the choke on it is better but still not perfect. someone mentioned a fuel pump but it appears to be pumping fuel, has a new spark plug in it. carb is spotless now inside and out. one thing i havent asked about was the screw with the spring (air-fuel mix maybe??) i only have one, how should that be adjusted? I love the idea of giving it more jet but i have to wonder since these look like they have been in the carb for awhile (course what do i know, i have owned this only a couple days). maybe i should shoot a youtube vid and post a link so you can see/hear what it is doing - would that help?






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 11-01-2009, 22:01 Post: 166657
badnova



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 JD Gator only runs with choke

posted a video here
http://www.youtube.com/watch?v=N6-U1wkLoCw

last i checked it is still processing into youtube, hopefully available for viewing soon






Link:   Click Here 

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 11-02-2009, 00:52 Post: 166659
badnova



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 JD Gator only runs with choke

are the fuel pumps rebuildable? where is the cheapest place to buy one or rebuild kits (if available)?






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 11-02-2009, 23:23 Post: 166685
badnova



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 JD Gator only runs with choke

well I 60 bucks later i have anew fuel pump and the problem still exists, I adjusted the carb air /mix screw also. I dont have a tech manual so can someone tell me the procedure for adjusting the valves ?

so far:
new plug
new air filter
new fuel filter
new fuel pump

i am still noticing the throttle linkage bounces around when just standing there pushing on the gas pedal - is this normal ?






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 11-03-2009, 00:20 Post: 166686
badnova



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 JD Gator only runs with choke

in the fwiw dept...hopefully this will help someone in the future.

i figured out that the fuel pump (part #AM109212) is actually kawasaki part number 49040-2066. The best part of this is that I found parts to actually rebuild these pumps should anyone need to. they can be found at: http://www.partstree.com/parts/?lc=kawasaki_engines&mn=FC540V-BS03+4+Stroke+Engine+FC540V&dn=99910-A4210140






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 11-03-2009, 08:07 Post: 166689
badnova



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 JD Gator only runs with choke

Thanks Gator, I'll try the valves this week if i have time or this weekend...yep sprayed carb cleaner around the intake area and no leaks after i put it on.

i'll run the valves next after that if it still exists maybe the governor adjustment?

Thanks for hangin with me on this Smile






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 11-03-2009, 13:57 Post: 166698
badnova



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 JD Gator only runs with choke

found the manual for the fe290d motor

http://www.mymowerparts.com/pdf/Kawasaki_Service_and_Repair_Manuals/FE120_FE170_FE250_FE290_FE350_FE400_SERVICE_REPAIR_MANUAL.pdf

hopefully that will also give me some pics to look at






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 11-03-2009, 17:50 Post: 166702
badnova



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 JD Gator only runs with choke

Quote:
Originally Posted by greg_g | view 166688
Helps me, thanks. Didn't realize the metal variant was actually rebuildable. The OE pump on my Kawasaki engine was plastic, and I've been wasting my money on replacement plastic versions ever since. The fact that the case is heat-welded pretty much discourages thoughts of rebuilding. But I'll now buy one of those metal ones to have as a shelf spare for when this current plastic one inevitably fails.//greg//




No sweat, hope it helps out on future repairs.






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 11-04-2009, 23:19 Post: 166732
badnova



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 JD Gator only runs with choke

Quote:
Originally Posted by gatoraider | view 166687
Helps me, thanks. Didn't realize the metal variant was actually rebuildable. The OE pump on my Kawasaki engine was plastic, and I've been wasting my money on replacement plastic versions ever since. The fact that the case is heat-welded pretty much discourages thoughts of rebuilding. But I'll now buy one of those metal ones to have as a shelf spare for when this current plastic one inevitably fails.//greg//


I had a few minutes to poke around a bit more on this and tried an initial attempt at this....

[QUOTE=gatoraider;166687] To adjust the valves. Engine cold. Remove spark plug and valve cover. stick something long and skinny in the spark plug hole to feel the top of the piston. Hold what you are using and slowly turn the crank until the piston is as high in the bore as it will go. As you are turning the crank look at the valves, if they don't move 10 or 15 degrees before the high point of the piston you are at top dead center. If the valves are moving in that span, you are not on the compression stroke and you need to go around again. Valves are both at .005

>>> Noticed that the exhaust was more loose than the intake. intake had a nice drag on the feeler at .005 the exhaust was loose - tightened it to spec .005

>>> i think the exhaust spring is a just slightly softer than the intake

As I said previously, check the rocker shaft for side play, also check the ends of the valves for dimples made by the rockers. Dimples will give a false lash reading. Push down on both valves to see if both have about the same resistance, you could have a weak or broken valve spring.

i think i grabbed the rocker arm and the shaft (main one that both rockers ride on) seemed to be able to slide back and forth a bit

I wasn't sure how to get the rockers off at the time to check for dimples, will do this all again Friday when i have more time and check then

Make sure your low idle speed is at least 1050 rpm.

>>> how do i check this - there is no tach, i do have an old sears tach/dwell meter i bought at a swap meet last year - would that possibly work?

I think the linkage jumping around is the governor reacting to a miss in the motor. There is a governor adjustment, but it is too hard to explain. Have you tried spraying starter fluid around the intake gaskets to check for leaks?

>>> last time i checked this it seemed ok but the gaskets could probably be replaced. will check again friday for leaks

Engine will speed up if there is an intake leak. Also take a compression test after you adjust the valves.

>>> previous owner told me compression was 85, manual calls for min of 57 - i will recheck this weekend

Another idea, when you had your carb off did you check the float level when carb is upside down? When upside down your float should be almost parallel to the bowl seating surface. If it dips down in the front, you could be getting too much gas in the bowl. [/QUOTE]

>>> tore the carb down again tonight and re-cleaned (wasn;t dirty) blew compressed air through every hole on it
checked fuel float and it sits higher on the side away from the needle

one thing i have found while scouring the net for answers is that others have had this exact problem, of course most never relayed what the fix was (one guy said i was his fuel pump) so I am still looking, there has to be an answer to this - frankly its driving me nuts..

open to any suggestions






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 11-06-2009, 23:03 Post: 166765
badnova



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 JD Gator only runs with choke

well thought i had a breakthrough yesterday, buddy of mine said change the fuel line it is probably collapsing choking off the fuel. i started the motor an squeezed the fuel line and coulda swore that the thing ran great - so i called my friend and said yep that was it, bought new fuel line and still runs like crap... arghh

i pulled the valve cover off tonight, pulled the rockers too, the valves seem to have a bit of dimpling in them (exhaust is ever so slightly worse than the intake) should there be any dimpling at all on these or should they be completely flat? only reason i ask is because the rocker adjust appears rounded like it came from the factory.


I also did my best to look in the tank for something stupid like a leaf or something getting drawn into the suction tube... nada

would like to have pulled the tank out and flushed it but it doesn't appear that this would be a very easy job w/o pulling all the brake and shifter linkage

ok...
so a recap so far

new plug
new air filter
new fuel filter
new fuel pump
new fuel lines (tank to pump,pump to carb)
checked the tank, pulled suction tube to make sure it is clear)

gonna show my neighbor tomorrow (hopefully) where i am at and pick his brain too (he is a mechanic by trade)

any ideas please let me know
thanks in advance






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 11-06-2009, 23:07 Post: 166766
badnova



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 JD Gator only runs with choke

Quote:
Originally Posted by gatormaki | view 166742
I have a 19 month old CX with the same problem- only runs with choke. Gradually got worse.I brought it in to the dealer yesterday as CX's have 2 year warranties. When they tell me whats up I'll post but I'm thinking my problem may be what a previous poster said- fuel pump.BTW? did your problem start gradually (only occasionally needing choke to run followed by a period of normal operation)?



i have ony owned mine for about a week now so probably not much help in answering this. but i think you are right, guy i got it from said it ran great last year, sat over the winter and ran like crap w/o choke this year (he puts stabil in all his tanks religiously and i have cleaned the carb myself at least 2 or 3 times now






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 11-06-2009, 23:09 Post: 166767
badnova



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 JD Gator only runs with choke

Very very anxious to hear what your issue was with yours so please post. I am pulling my hair out about now. would take it to the dealer but frankly no funds at this point (still paying for the gator) hahaha..






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 11-07-2009, 18:46 Post: 166778
badnova



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 JD Gator only runs with choke

Well we found it and it is so stupid i cant believe it but here was the problem: part number M127231 (Restrictor) some dumb orange cap in the intake from the frame to the air canister) looks like mice chewed it up so the hole was too big (no longer restricting). when we first saw the cap i thought - why would someone put that in there and then my neighbor pointed it out in the parts book. we put a makeshift (temporary) restrictor in its place and whadda ya know runs normal now.

Thanks to all of you for your help, especially Gator - dude you are a godsend to this board. Your knowledge and willingness to help is greatly appreciated, THanks for taking time to stick with me on this helping me diagnose along the way - Thank You

I am so glad I found this board, would have been lost without it. You guys Rock !!

I have a attached a pic of the offending part - hopefully this will help someone in the future.





Picture Link
John Deere Gator: JD-Gator-only-runs-with-choke

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 11-09-2009, 16:53 Post: 166807
badnova



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 JD Gator only runs with choke

i agree might be worth a call to parts tree - maybe a kit of rubber parts is available just not listed






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 07-25-2010, 15:53 Post: 172567
badnova



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 JD Gator only runs with choke

you may want to read this whole thread, problem was fixed by replacing a 2 dollar part - a restrictor before the carburetor. check it out, had myself and most dealers round here stumped.






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 10-06-2010, 21:52 Post: 174406
badnova



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 JD Gator only runs with choke

Quote:
Originally Posted by mrmopar | view 174393
I have had this problem for two years now on my 2002 gator 4x2.John Deere will not help you even though they know of this problem.John Deere is never very helpful when you have a problem.That is another story.OK,Here is what my research has turned up.There is a plastic restrictor plug located in the airbox inlet that goes in to the frame.Why would John Deere want to restrict the air intake?I cannot think of any good idea for it.When this restrictor plug falls out of the airbox and it will, it most likely falls in to the frame,That is where I found mine.Without the air restriction the carb runs lean from too much air and thus you need to use the choke just to drive the thing even when warm.Only thanks to tractor and fix it forums like this will you find this out.Our friends here are more helpful than all the John Deere dealers and service people you could talk to.Thanks everyone here for the help!! God Bless you all!!OK,Here is the fix.Most importantly,Do not buy a new $300.00 carb or $50.00 jet kit from Deere,That is what they want you to do.You already paid $6000.00 for a machine you can now barely drive.Assuming you have the Keihin carb, I think Kawasaki used them almost exclusively,Call or go online to Jetsrus out of Marsfield, Mo.They have the jet you need for $14.00 delivered to you.THe keihin carb has the pilot jet located on top of the carb,mine was a size 42.The main jet is in the float bowl as usual.Take off the carb and unscrew and remove the jet.Ther is a separate tube that will fall out when the jet is removed.Be careful to put this back in the same direction it came out.My main jet was a size 88.Order the main jet from jetsrus in a size 92.Description to order is Genuine Keihin slow air jet size 92 (sku-99101-ZF5).Price is $7.29 and $6.98 shipping.Clean the carb with spray carb cleaner and spray in the jet holes and the air bleed small orifice in the carb throat.Put the pilot jet back in the top of the carb, my size 42 does fine. In two days you will get the new 92 main jet,Reinstall the main jet and tube and float bowl.Replace carb and throw away the air resrictor plug you found in the airbox inlet. You have now rejetted and fixed the lean mixture problem.Start up the Gator with the choke, let warm up for 1 minute, put it in gear, Slap your left hand now for wanting to grab the choke again to keep the thing running,Now,Nail the Gas and hang on!!One last thing, Run in the house screaming to you wife that you have a new gator,she will really appreciate it now.




Excellent info - Does it run better than with the factory supplied restrictor? I think the reason they did this is they probably saved manufacturing costs and were able order millions of the wrong carb - probably fits a different deere product - so they cheaply fine tuned air flow with the restrictor






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 10-06-2010, 21:54 Post: 174408
badnova



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 JD Gator only runs with choke

btw i paid less than 3 dollars for my new restrictor and it runs fine now. if it can run better with a diff jet i would be interested






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Discussion Boards > Active Subjects > Messages as Posted > John Deere Gator Forum

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