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Discussion Starter #1
Hi everyone,
Just recently had trouble getting my Rincon started. Went out to start it and got no sound. Dash, lights and such all were fine. Battery was charged. Tried and tried...nothing. Then stupid me realized it was in D. Switched it to N and hit the start button and it just cranks but doesn't turn over. I've checked for spark....it has it. But am going to try and get a new plug. Put in some more fresh gas. Still nothing. I took a video for you to check out in hopes it's just a simple fix. Thanks!!

 

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If you have the time pull the plastics and tank off so you can have working room, pull of the fuel line or if there is a test port, call your local dealer Service Dept and see if they can tell you the fuel pump pressure and walk you through the diagnosing steps. It's not spark related cause you said it has spark. I'd leave the plug alone but if you have to change it. I would get an (Iridium plug) for that model atv. They fire and burn better. but first before any of that. I'd clean your throttle body and Map and MASS sensor just to make sure you dont have any hiccups. Start in baby steps.
 

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First pull the air box but leave the airbox sensor plugged in and spray starting fluid or carb cleaner or brake cleaner into the throttle body and see if it tries to start or starts for a second. If it does then you don't have a spark problem you have a fuel problem. If it doesn't then you have a spark problem.
(Note: it will not start if the airbox sensor is not plugged in)

If it starts for a sec after spraying starting fluid then address the fuel problem by changing the fuel filter or the fuel pump. I hear the fuel pump turning on but EFI is very sensitive to the amount of fuel pressure it needs in order to start so a clogged fuel filter could be starving it. Try changing the fuel filter first if it doesn't work then you need a new fuel pump.

If it does not start for a sec after spraying starting fluid then address spark problem with a new spark plug. Just because it has spark doesn't mean it's a good spark. If that doesn't fix it then additional electrical testing will need to be done which we can help you.
Let's us know the results of spraying starting fluid first.
 

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Discussion Starter #4
Ok so I was able to spray just a little gas, don't have any of the other fluids on hand, and was able to get it to start for just about a second or two. I've already put in a new spark plug so I believe we're not getting fuel for some reason. Once it burns through the little gas I spray in it dies.

The only change since the last time I rode it was I noticed after inspecting the gas tank that my plastic hose from my Vp racing gas tank had fallen into the Rincon gas tank along with the metal hose clamp. Don't ask me how that happened and how I didn't notice it was off my gas tank. I was able to get it out. Wonder if that could have caused some sort of blockage in the tank. Just throwing the idea out since that was the only thing different that happened to the atv.

Where do we go next? (Hopefully not to the repair shop)

Thanks
 

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Have you changed the fuel filter? Once you get it all sorted out make a habit of using a fuel system cleaner in every tank. Just helps go along ways. I done that from day one since I had my 300 Fourtrax and not one carb hiccup or problem. And no that wouldnt have caused a block even if a hose and clamp falls down there's so much fuel and the hose for the pickup is on the bottom of the tank it would still pump fuel.
 

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Discussion Starter #6
Do you suggest like a can of sea foam?

Are we thinking it's a clogged fuel filter?

Thank you for the help
 

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Do you suggest like a can of sea foam?

Are we thinking it's a clogged fuel filter?

Thank you for the help
Usual dosage for cleaning is 2 ounces per gallon I'd go that route first after you get it running for 2 or 3 tanks then go to 1 ounce for normal usage. Yes Seafoam is excellent stuff, many people here use it. :D Here are two articles that will help you.

https://seafoamsales.com/article-fall-transition/

https://seafoamsales.com/a-quick-visual-lesson-on-gasoline/
 

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Discussion Starter #8
I'm the second owner of the atv and I have not changed the fuel filter. That's located inside the fuel pump...correct?
 

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I'm the second owner of the atv and I have not changed the fuel filter. That's located inside the fuel pump...correct?
Sometimes yes but sometimes you get pucky and their outside but its not that hard to do, unbolt the tank after fuel valve is OFF or tank is drained. Then find the fuel pump harness and unhook, unbolt and pull out, there should be a screen for a filter in the tank. But the main filter is outside on the frame somewhere.

I dont know what you have, but I looked and it should be a canister type, somewhere next to the pump and before the regulator if it has one.

Fuel filter assembly #2

https://www.bikebandit.com/oem-part...-680-at-trx680fa-fuel-pump/o/m150838sch690847
 

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Discussion Starter #10
Yea I have the fuel pump so the filter is in there. I do not have an in line filter outside anywhere. Also, I don't think I have a fuel shut off valve anywhere.
 

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Yea I have the fuel pump so the filter is in there. I do not have an in line filter outside anywhere. Also, I don't think I have a fuel shut off valve anywhere.
Has to be a valve somewhere near your leg if your sitting on the wheeler. Or how would you remove the tank to say adjust valves and not have fuel leak all over lol.
 

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Hi: Your fuel filter could be your problem its located in the sub fuel tank with the fuel pump located left side in front of the engine.
 

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Hi: Your fuel filter could be your problem its located in the sub fuel tank with the fuel pump located left side in front of the engine.
Mel. When you say sub tank, what are you calling a sub tank? oil tank? I never heard of one for fuel systems. I assumed the pump was in the main tank above the engine.
 

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Hi JDP: The Main fuel gas tank gravity flows fuel to sub fuel gas tank that holds about 2 cups of fuel -- the filter and fuel pump are in side that sub fuel tank.
 
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Discussion Starter #15
I know where that is located. It's pretty visible in the front of the engine.

So carefully disassembling that will get me to the fuel filter?

I still am unsure where a fuel shut off may be. I haven't come across one.
 

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Hi JDP: The Main fuel gas tank gravity flows fuel to sub fuel gas tank that holds about 2 cups of fuel -- the filter and fuel pump are in side that sub fuel tank.
Awful small amount and volume of fuel to be fed to the pump, it makes me think the injectors and throttle body wouldn't get the pressure cause in theory the pump isnt getting a proper supply of fuel cause it's in a sub tank and like you said holds about 2 cups of fuel. Know what I mean?

Alien to me.
 

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I know where that is located. It's pretty visible in the front of the engine.

So carefully disassembling that will get me to the fuel filter?

I still am unsure where a fuel shut off may be. I haven't come across one.
Yes it'll get you to the filter, it should be inside the housing. After you unhook the fuel pump conector and undo the screws or bolts and the top should come off, or at least from the picture and videos on youtube of the fuel filter and pump on a 420 Rancher look the same, so maybe take a look.
 

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This is an amateur video on a different bike but it will give you an idea of what's involved with your fuel pump. There is no fuel cut off on your bike so you'll need to drain the tank or pinch the hose.
Be very careful removing the line on the pump that goes to the throttle body because it can break.

If you have a dealer near you then a filter will run about $25 or you could just replace the entire canister setup for about $90 and wouldn't have to take anything apart.
These can also be ordered on ebay.
You'll be back on road in no time.

https://youtu.be/F2eDZfsVg80
 

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I'd replace the canister setup, easier and like said above wouldn't have to tear anything apart but.. I would get an extra sealed fuel filter and gasket to keep and change the fuel filter more often cause you really dont want dirty fuel. And run a fuel system cleaner in every tank after 2 or 3 tank fulls to clean everything out. This is a maintenance item
 

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Discussion Starter #20
Thanks for all the replies back. I almost feel safer replacing the entire canister setup. Now to search for the best price
 
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