Idling problem! - Honda Foreman Forums : Rubicon, Rincon, Rancher and Recon Forum
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post #1 of 11 (permalink) Old 05-06-2010, 07:47 PM Thread Starter
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Question Idling problem!

I have a 2002 Honda Rancher 4x4 with electronic shift. It sat in a building for 2 years and just the other day I decided to get her out. I knew the gas was ruined so I went ahead and drained the tank and dissasembled the carburator and cleaned it. Everything went together fine and with a new battery and fresh gas it fired right up. Problem is i cant find the sweet spot on it to idle. When i adjust the throttle adjuster and it seems it idles fine, then after i give it the least amount of gas it will idle high as if i adjusted it to far. So then i back the throttle adjuster off but then it will not idle. i have the pilot screw adjusted (the manual says 1 and 3/4 turns out) and ive made sure the choke is working properly. All the jets in the carb were cleaned and clear. Ive takin the carb apart twice now and drowned all the holes with carb cleaner and compressed air to make sure. It runs great if your riding it but it will either idle too high or not at all. I have no modifications done to it such as exhaust or the air breather lid taken off, its all stock. Please help me out and give me some advice.
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post #2 of 11 (permalink) Old 05-07-2010, 03:51 AM
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I had this same problem with an ATC 90. Never could get it running, finally sold it for dirt cheap. I'd like to see what people have to say about this problem

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post #3 of 11 (permalink) Old 05-08-2010, 07:07 PM Thread Starter
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Does anyone have any thoughts? It also backfires a little when you let off the gas. I dont know if this could be a cause leading up to the idling problem or not.
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post #4 of 11 (permalink) Old 05-08-2010, 11:07 PM
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It sounds to me like your pilot screw is dirty or clogged up?
I dont know how much you have ridden this machine since all the cleaning but sometimes it just requires a few tanks of New 91 octanes to clear it up.
But I did have a 2000 Rancher that would only run on choke when I got it and I did everything you have done and it still ran like yours .
I had to buy a Rebuild kit in order to get it to run and idle like new.

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post #5 of 11 (permalink) Old 05-09-2010, 09:59 AM Thread Starter
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It has around 230 miles on it. The the carb looks spotless on the inside so im afraid a carb rebuild kit will not do it much good. Ive looked at diagrams to make sure the carb is complete so I know its not missing anything.
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post #6 of 11 (permalink) Old 05-11-2010, 07:35 PM
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Almost sounds like an air leak on the intake.

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post #7 of 11 (permalink) Old 05-12-2010, 05:26 AM
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I believe you still have a dirty carb. The hanging idle is a result of it running too not enough fuel at idle. Simply using carb cleaner and compressed air will not fix the problem. Take the carb apart again and remove the jets. Use strands of wire and force them thru all the holes in each jet, especially the slow jet. You may need to use different sizes of wire (16, 18, 22 gauge) to get into these holes, but its the most effective way to unclog these jets.

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post #8 of 11 (permalink) Old 05-21-2010, 11:45 AM Thread Starter
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Speed was right! I took the carb apart and sure enough the slow jet was stopped up. After the 3rd time taking the carb apart the quad idles great. Third times a charm I guess. Thank you all for your input!
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post #9 of 11 (permalink) Old 06-16-2010, 05:37 AM
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My rancher 350 sat for a year, and when I started it up I went through the same thing. It wouldn't idle unless I kept the choke pulled out. I took the carb off and cleaned it, put it back together and it still wouldn't hold idle. So I turned the idle up until it would stay running, poured half a bottle of Seafoam in the tank, filled it up with fresh gas, and rode it for 8 hours this past Sunday, about halfway through the day it had cleaned itself out and I turned the idle back down to normal. Try Seafoam and just ride it a little it, maybe it'll clean itself out. Good luck.

*Edit: I didn't read all the way down, looks like you got the problem solved.
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post #10 of 11 (permalink) Old 06-18-2010, 05:17 PM
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So the seafoam thing really works? where can i get some of that?

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