How to fix Kubota RTV 900 loss of power
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Do you have a Kubota RTV 900 or RTV X900 that the engine dogs out and loses power when you accelerate going uphill? If so, this is an EASY fix adjustment to cure that! Join me as I walk you through exactly how we did it and just how EASY it is. The Kubota RTV 900 and RTV X900 is a great machine, but I suspect that due to very strict emission controls they went just a tad too light on the fuel supply to power this beast! Please LIKE and subscribe to follow all of our country living adventures, tractor and excavator videos, hunting, fishing and more. Kapper Outdoors, living the dream, one acre at a time. You can order Kapper Outdoors custom merch like T shirts, turkey slate calls, box calls, diaphragm calls, duck calls and drink coasters at: www.cataclysmcalls.com/kapper...
Equipment list on the Kapper farm:
2018 Branson 7845c tractor
2017 Bobcat e42 mini excavator
2016 Kubota RTV X900 diesel UTV
2015 Intimidator Electric UTV
2005 Kawasaki Brute Force ATV
2001 Chevy 3500 dually dump truck
Stihl ms 362 (2) chain saws
Stihl pole saw
Stihl HD weed whacker
Stihl 'regular' weed whacker
I did this, made about 4 or 5 turns and it works great... No more dogging up the hill!! Thank you Kapper!
In ml
Thanks Kapper, Great info
Thank you so much for this wonderful, Informative video. VERY helpful. This helped my machine so much. Thank you!!!!!
Thanks for posting this! Great video, I will be performing this to my 900 dog today
Awesome man! Comment back and tell me how it went!
Great to finally find something on the fuel pump screw! Thanks!
Good luck! I seriously can't believe they've known about this for years and never fixed it!
I just did this procedure on my neighbors 900 and it solved the dogging problem! It couldn’t climb a steep grade even in 2 and 4 wheel low. We just kept adjusting and driving to find the sweet spot. I was a little concerned that the locking nut could vibrate loose so I added a lock washer. The final test was to tow a 1000 lb Polaris Ranger with me in up a steep grade. Chugged right up in 2 wheel low and never slowed down and no smoking. Thanks again !
Good deal! But I really hate that Kubota has let this problem go on for soooo long! Many years of owners have had to deal with this! And I don't know the fallout by adding more fuel, but man, it really sucks when you hit the gas uphill and it just bogs down!! Best of luck man, thanks! !
Thanks for the info! Can't wait to try it with my RTV 900.
Good luck!
Good tip for the Kabota folks Joe, nicely done!
Thanks Doug, we'll see when I put it through some more rigorous testing :-)
Thanks for sharing. Good to hear you solved the problem.
Yes it is simply amazing the huge difference in power. Thanks
This was a great fix, easy and affective. Made a great machine better.
I really wish they'd fix that from the factory! Lots of guys had the same issues!! Good luck,
Nice simple fix 💪💪
Thanks for the fix, I just fixed mine and works great, just had a little trouble taking that spinning cover off the bolt, I adjusted it where it smokes just a little at first.
Good deal, man. I don't understand why Kubota hasn't fixed that yet because everyone knows it's been a problem. Good luck. Thanks.
Great content. I thought it was fuel starving as I have had an old 900 that just goes without hesitation - sold to the neighbour. The x900 has been frustrating ... changed every filter , drained and cleaned the tank ... etc. Thanks for saving me further fruitless work.
Hope it works for you. I got rid of it, lost money, but just didn't want to deal with it any more. Such a shame they don't fix that issue!!! Thanks and take care
@@kapperoutdoors my 900 gets low.pressure at the injectors
My bud had same issue w his Polaris.. keeping that jam nut tight was key.. keep the vids coming sir. Hope ur hip is getting stronger and stronger..
Thank you I appreciate it it's amazing how much more power this thing has now. Stick around the channel and I'll keep them rolling! Thank you
I had that problem when I had mine. I’ve sold it already, but very great info!
yes this problem seems to have been around for a long time I really can't believe that Kubota hasn't fixed it. Kind of unbelievable isn't it?
Thank you! Solved a very annoying problem.
Best of luck, I ended up getting rid of that Kubota.
love kubotas wich there so easy to fix and repairs and parts are desent price wich is nice
Great video!!!
Glad you liked it! I have since got rid of this thing, now have a Polaris Ranger XP1000 Northstar! Best of luck, hope to see you again on some future vids! Take care
I tried this out and it work like a charm thanks for the info. Went from going 16 mph to 23 to 25 mph. It does a lot better going up hill now as well.
Good deal, and good luck! I ended up getting rid of that thing though!
Thanks a bunch, I use mine for moving farm implements and an in bed 60 Gal spray rig for spraying fences, it is a dog when the tanks are full in the bed. Thanks will try this out.
I’m in the same boat! I have a sprayer with a 60 gallon tank. I have a Can Am HD5 and it struggles at 5mph when spraying, so I am looking for something different right now.
Great fix Joe! Nice little adjustment to increase the fuel and get some more power.
Thank you I appreciate it and it is amazing the difference. I wish I'd have shot before and after videos but either way it works great. The power is unreal now. Hope you stick around awhile yet cuz you will see it :-) thanks
Is it just a fuel rack limiting screw? Great video!
Thanks Much. My brother has one of these with this problem, especially when warm, it dogs out on steep hills. I will edit this comment after adjustment.
Best of luck, hope it works. I was really disappointed in Kubota knowing this has been a long standing issue and not remedying it. This is not the 'proper' fix for it, but like you guys people are frustrated by this issue. Thanks
@@kapperoutdoors My brother was ready to dump the vehicle after complaining to the dealer about it and getting no resolve. Waiting to here back from his efforts.
Good info, I have a 900 myself but haven’t noticed anything yet. However I only had it for a year.
yes I've heard some people haven't noticed the problem but it really only happens uphill or with a huge load on the engine. Be glad yours runs pretty smooth :-) stick around and I'll put it through a little more testing, thanks
@@kapperoutdoors 14' RTV-X900 and I hear you loud and clear...Tried @HuntingInPA half pedal modulation to drop it a gear but not sure it works, will definitely experiment with your suggestion.
The pedal on your RTV moves the Swash plate in your HST....it does not move the governor on your engine. Your engine regulates its RPM's based on where the swash plate is. If you read your operators manual it will tell you that if you lose power going up a hill you are to let the pedal out until you hear the engine downshift then hold the pedal at that spot and the machine will go up the hill with power. They were designed that way to save the HST from going out by getting too hot. Mashing the pedal does nothing but losing all the pressure out of your hydro therefore stopping the machine or really slowing it down depending on how steep the hill is. RTV's are compact tractors with a passenger seat and truck bed designed to move heavy loads around at tractor speeds. They are not belt driven machines designed to fly up and down hills.
Yep, I am aware of that, but still don't like it! Man, when you mash on the pedal, HST, hydro or not, you should have plenty of power to boot! thanks.
Kapper Outdoors mashing the pedal on a HST transmission is like starting your 5 speed vehicle in 3rd gear. Yeah you can get to higher speed faster, but try it on a hill and you find out real quick it doesn’t work real well
HUNTING IN PA Question, I have a 2007 RTV 900. In medium speed gear should I be able to climb a somewhat steep hill if starting at the base of the hill? If I switch to low mine will climb easy, but medium sounds like what you mentioned as starting out in 3rd gear on a standard transmission.
Thank you!!
You're welcome!
wow, so happy i found this video. We have an 06 model and while using it today, it only went 10mpg....when we bought it in 08, it went 25mpg....we have no idea why it's so sluggish. I can't go up an incline at all, not even in 4wd....going to try this! thanks much!!
Best of luck hope it works! We got rid of that dog! lol. I really can't believe they let that go on for so long with those machines!
Thanks so much for this info, I'm picking one of these up (used) and I'll need this I'm sure, really hilly where I live.
love youre videos.....which lottery did you hit? ha
Your video was well appreciated, might also do one on plugged spark arresting inside muffler.
Had this on 2 Rtv 900 diesel major power loss and over heating issues we could not locate.
I tried to clean that, but on my model it was not one that would allow for cleaning.. Too bad.. Thanks have a good one
The overheating issue most likely is from your radiator fan not turning on not the belt driven fan but the radiator fan that is electric that is most likely your issue you can hardwire the fan to the ignition so it just comes on when you turn on the key
I believe that I tried to clean the spark arrestor but I think it was a sealed unit that I could not get access to clean it. Either way for me, I ended up trading in for a Polaris. Cheers!
1. Black smoke in a diesel is in burnt fuel
2. If you increase your rail flow you should consider removing your spark arrestor due to the excess unburnt fuel it will pig up in no time and you will loose the power gain you got
3. Try removing your stock air filter , increasing intake pipe size with a very unrestricted air filter .
4 . Get a more aerodynamic unrestricted exhaust headers you will find a huge increase in power .
The trick to diesel isn’t more fuel unless you can give it more air in and more air out
Here's an idea, how about Kubota fix this issue from the start! I did look at the things you say, but did not want to rebuild the whole thing with expensive after market parts. For me it just was not worth it. I got rid of the thing.. Thanks.
That nut with a cap on it is called an acorn nut. That adjustment is to control the fuel flowing in the fuel rail. 👍😀😎
Well whatever the case it sure helped a lot!
That is good to know, I have the 1100 but it can be a dog sometimes as well. I’ll have to look closer at the injection pump on mine.
I couldn't stand that thing, to mash on an accelerator, means you want more power! Not less!! LOL
@@kapperoutdoors I want to turbocharge mine, I hear it really wakes them up.
Late to this video... I have 2 RTV 900s, each pushing 1000 hours... another item which can gradually rob power is the final spark arrester screen just inside the tail pipe.
It gradually gets clogged and creates lots of back pressure, inhibiting engine breathing.
Spark from diesel exhausts should not normally be an issue on these, and cleaning with carb cleaner or brake cleaner is a snap, so do what works for you.
Now you have something else to check!
I need to do this on my 1100 as well!
I ended up getting rid of that dog! Love my new Polaris Machines!
Thanks for info I know 2 brothers that own them, will have to ask them
You bet, check back in and let me know if they try it. Thanks
the thing you adjusted is the govner set screw. to increase the fuel flow on a kubota you remove shims from under the fuel pump. that will also change the timing. kubota pumps are fairly built the same for most all applications. i have the d1402 and a d902 kubota . they are really easy to work on.
Got rid of it because of this. Just a shame they never corrected this kind of problem so many have had with it.
Have a 900xt ‘12..Did yours do it only in certain gear? I haven’t noticed a ton..but normally if it slows with me I just drop it from h to m or to L.
That's probably why it was doing so good on fuel!
Yeah you ain't sitting! But I suspect I will hardly notice a difference even with a couple of turns. But we'll see stick around and I'll keep you posted. Thanks
I'm going to try that and yes about being a dog depentbai but no snap thanks for sharing the video
Yeah I really cannot understand just why Kubota has never remedied this 'dog' problem for so many years!! Good luck.
Yes Sir it made a difference for sure I thank you for the video I'm used to tractors and equipment that has plenty of power my Dad broke me in on his 4020 When I was 12 the heavy the load the better it ran I guess it's the emissions laws that hurts the Kubota power but it's way better than it was thank you
will this give it more speed
Thanks for the video, I was having the same problem but was a clogged fuel filter, did you notice anymore top end speed, 24 mph is all I can get out of mine, did the screw adjustment increase your top speed
I haven't really noticed on the top speed but I need to do my service and fuel filter change to see how that goes.
In theory, it shouldn't change top speed, but it may get you to top speed faster. Speed is determined primarily by the engine RPMs. Diesels turn slower than gas. The gas version of this is called a Sidekick and because the gas engine can spin faster, it's top speed is around 40 instead of 24.
If it doesn't have a turbo do they make one for it? That would definitely add power to the engine. I know when I was in the Army the old M35 2 1/2 Ton trucks didn't have turbos, but the newer model M35A2's did, a lot more power and torque. Even the M52A2 5 Ton Tractors had a turbo. Of course, those trucks had multi-fuel engines and in addition to diesel, you could even run JP4/5 fuel in them you talk about power with that fuel. I ran my tractor from Ft. Stewart, GA back to Ft. Bragg, NC one time running JP4 jet fuel. It ran so clean that the inside of the stack was cocoa brown instead of the usual black soot inside. Got an extra whole three miles an hour out of it too. Not sure if JP4 would actually hurt a straight diesel or not.
Yes there are all kinds of aftermarket ways to improve the power but I didn't want to waste the money and this is very simple! If I had a lot more ching in the bank right now I sure would try a turbo, LOL thanks
We have a 900 and I've noticed it does terrible climbing hills, especially pulling logs. I'm very much looking forward to making this adjustment tomorrow. I would have used this for years and never known there was a fix
Edit:. My seat doesn't come apart as easily as yours. I managed to remove the spinning press fit cap without taking all the plastic panels off .... but was not easy
yeah I just can't believe that a company like Kubota would not fix this issue since it's been around for so long! If it would 'GO' when I mash the pedal I would have loved that thing!!!
@@kapperoutdoorsShould I see how far until I see black smoke and then dial it back til smoke goes away? I did a few full twists and I think I can tell a difference climbing but hard to say since steep hills are all muddy now. Don't want to do anything too drastic
@@makingawesome8730 I would only do the absolute minimum number of turns just to boost the power just a little, that's my opinion, good luck.
@@kapperoutdoorsa lot help thanks glad that u guys share this trick I really appreciate it do you know by chance how to take the governor off mine only goes like 15 mph and my wife goes 25 I don't want to race with it I just want to get it to move faster thank you in advance this was really helpful
@@hectorbaena7206 Sorry I don't recall that. I ended up getting rid of that thing.. Best of luck, thanks
Hey man, really nice video. My dad got a Kubota RTV 900 but he got a problem with the fuse box but we can't find it. Do you know where is it ? Thanks ;)
Bastien Plisson behind the cab under the bed
🙏
There’s a spark collector inside the exhaust at the back of the Kubota and it can get blocked and collapse over time causing power loss. Can be removed by two bolts for inspection.
I actually tried that first on this one and it was not one that could be removed I think it was permanently encased in welding if I remember correctly.
@@kapperoutdoors I’d say you were happy when you got it fixed! Nothing worse than not knowing what’s wrong and no solutions online. How do you find the Kubota RTV compared to the Polaris?
I ended up getting rid of that Kubota and I absolutely love the new polaris. Much better overall. Don't know why Kubota left those issues go for so many years because so many people had them problems they could have remedied it. Thanks
I have a RVT 1100. We are having some of the same issues. Ours seems to have loss of power once it gets a little warm. Were you noticing this once yours got warm? Ours will climb a hill when cold but, very slow. Once it gets warm won't climb a very small hill. The service guys at the local Kubota don't have a clue. Going to try this today.
Good luck! I can't stand the fact that they are so highly rated, yet they have this issue that has been going on for years!!!! (If I'd have known, I wouldn't have bought it....)
did that work for the 1100
I'm glad you figured that out great educational video
Yes it is still baffling how this has been a problem for so long and yet Kubota has refused to change it.
love reading the comments. biggest problem is usually thinking these are run the same as their competitions machines and nothing could be more further from the truth. no one bothers reading the owners manual then cries that it dont work right.
Well having owned many different utv's I have to say that I do think that Kubota really could have fixed this issue. Regardless of what type of fuel driven machine it is, in general when you mash the gas pedal you want to go as fast as that machine is capable. But with the Kubota diesel you have to really feather the pedal and when you mash it, it bogs down. I know what you are saying on this, but still believe they could have done much better with it. Anyway I ended up getting rid of it, I just could not deal with that. Thanks
Does anyone know if a similar adjust can / should be made on an RTV 500 (non- diesel) Kubota? I experience the exact same thing and it makes me sad every time I try to go up a hill.
nope dont bother a 500 is what it is
Don't forget to clean spark arrestor. Doesn't take long at all to get plugged with soot. Mesh is too fine IMO.
I tried to, this one does not come apart. It only has like a drain plug in the bottom if I recall correctly. I suppose they did that so it could not be removed.. thanks.
Any idea how I can get the press fitting off? Currently working on this thing and it’s making me go absolutely mad. Have tried pliers and a flat head :|
Figured it out.. they changed the design unfortunately. Now the RTVX900 has a threaded cap that is all one piece. I ruined it because I thought it was a press fit like this one.
Hopefully I can find one from my dealer.
Best of luck it is really a shame that Kubota keeps making them like this. I ended up getting rid of mine. Thanks
How do you get that round cover off to adjust the screw, I'm assuming it's gonna break
I got that round keeper off, the capscrew is pressed into it which made me unsure how it came off but once off, I turned it out 5 turns and complete different machine
I was able to just basically unscrew it. then on my vise used a punch to pop acorn nut and set nut out. Then there is just threads sticking out of the intake, adjust them to your liking and put set screw on and then acorn nut. She really flies now!!!It was a dog before. It rolls some coal when you stand on it, but thats ok with me
Do you think that i could do this same thing to my Kubota X1120 ?
Quite possibly... I really hate that Kubota has known about this for years and years and yet never addressed it. That's why I dumped it. Good luck, thanks.
I need rotor for it
Wish I could get the gd tamper cover off
Yeah they’re metal now instead of plastic. I assume you’ll have to dremel it off
How do you get that free spinning plastic cap off of the thing? I’ve tried everything and mine won’t come off. Help!
Now I am thinking that it is made of some sort of metal, still..... help!
@@bennyfisher1 looks like aluminum on mine. Any luck removing it?
I squeezed mine with channel locks and it pulled right off.
It is indented on the sides. Squeeze opposite of the indentations.
My 1100 does the same, now it's having a hard time starting up no matter how long I leave I leave to yellow Glow light on. Even if I keep it in the heated garage. When it does finally start to run, it sound like it's gonna turn back off. Ugh
I got rid of this thing. Way too much of a dog for me. Best of luck with yours, thanks
Is there a trick to getting the cover nut off? Doesn’t want to come off for me.
Man, I think there was but it's been awhile so I don't recall! Best of luck though, thanks
What would the part number for this screw be?
Sorry have no idea about that.
Turn in (right) or turn out (left) to add fuel?????
It's been a minute but if I recall right you turn it in to reduce fuel..
any idea how to fix 4 wheel drive in those?
Nope, can't help there! Good luck though! Is it totally out?
@@kapperoutdoors Thanks Kap. Yes it's totally out. My mother in law has an older one and the 4x4 doesn't transmit any power to the front. Makes it pretty useless in the winter on the ranch...
yep, 4wd is a must! Good luck with it, hope you can get it fixed without crushing the check book!
@@NCSUME1 I'd check your linkage, its a pretty simple 4wd system.
They are not TRUE 4X4 ...LIMITED SLIP IN FRONT END
Will this also work on an RTV 500? Anyone know if it is in the same place?
RTV500 is not diesel so, no
I'm looking on my 1100 for this but cannot locate, anyone know where?
Kubota should have remedied this years ago! Good luck man! Thanks.
@@kapperoutdoors I found it, thanks.
@@brandonw1667 I have a 1100 was it in the same place?
I have the same problem with my Kubota rtv 110 anybody have a fix for it?
I ended up getting rid of this DOG... Such a shame they let this problem go on for years! Best of luck thanks
Anyone know how to get the bed up to get access to the battery? Mine died and I need to get to it but dont know how since there is no power. thank you.
I have a 2010 RTV 900. Push the lift lever forward to the float position, then you can lift the bed manually. It takes a person on each side to lift it, then once up, put that bracket over the cylinder rod to hold it up
Whoops should have said 1100 not 110
Owning a new Kubota XG850 has been a nightmare. It has serious mechanical design flaws in the 4WD and clutch system. Parts replacement will not resolve these design problems. Kubota will not honor their warranty without a lawsuit. They have been sued over and over for failing to honor their warranty when the defect is widespread and super expensive to resolve. We will never buy from Kubota again.
Yep, we won't ever have a Kubota either... Such a shame for a decent company to fall so short like this. Thanks.
Easiest way to fix it is sell it and buy a Deere lol. This video is 3 years old, just wondering if you had any bad results from this? Thanks.
lol I sold it too!! But now I have Polaris, :)
As a Kubota tech. This is not a fix!!! Your just adding more fuel. Terrible advice.
Well Kubota, knowing this lack of power has been a problem for so many years should have cured it!! You are right, just adding fuel, but soooooo many people have been plagued by this issue. Thanks
KAPPER TOO MUCH FUEL WILL WASH CYLINDER DOWN AND SCORE CYLINDER AND PISTON. LIL ADJUSTING LIKE YOU DID WILL NOT HURT.
yeah I would say for a gasoline engine might be a little more risks but for a diesel was just a little tweak this will be fine. You should have heard it go when I ran it without the air filter also. this just tells me the engine has tons of reserved power that they are forced to keep it down due to emissions. Thanks man
gas will wash a cyl, down-diesel no
TOO MUCH DIESEL FUEL BURNS TO HOT. MELTS PISTONS/SCORES CYLINDERS
You should of bought Polaris Ranger and you wouldn't have those kind of problems .. I've never had any problems with my Polaris ...lol
yes I agree Polaris is a great machine but I got a really good deal on this diesel Kubota with only 50 hours on it so that's why I jumped on it. But I'll tell you what there's a big power difference after just a little more fuel :-)