225dx carb problems still

[crownpoint]

I have an 85 225dx. i've taken the carb completely apart and replaced a couple parts that looked bad. got a new gasket for the float bowl and got it together and still have problems. there is too much fuel in the bowl. i know this because its leaking out the bottom of the carb where the drain is. i thought the screw was the problem but after replacing it and testing it now i know the fuel is coming out of the brass pipe that drains the fuel if the level is too high.

besides the fuel coming out the drain the machine runs ok with the choke on. as soon as i put the choke off the idle goes up very high and i can't seem to turn the idle screw enough to make it ok.

the needle valve and the float looked ok to me so i think its the float level. does this sound right and what is the correct level for this float? i set the main screw on the bottom to 1 and a half turns. i read in a post that this is where it should be and everyhting else is tightened down. by the way it smokes alot.

[Erics350x]

you need to adjust the float and the mixture screw in front of the fuel bowl. all the other screws/jets should be tight

[crownpoint]

well i took the carb apart again and raised the pin on the float that operates the fuel coming in. now the choke and idle are dialed in ok but it misses a little sometimes at idle, like it doesn't have fuel then the drain on the bottom starts leaking a little bit like its got too much fuel in it. can anyone tell me the correct height for the float and a way to measure this? thanks

[traxxasx]

Look take your carb off.
HOld uit up right and "blow" air into the gas inatke tube. Air should go in fine?
Now, flip the carb upside down and blow air into it, if are stil goes in while it upside down its not sealing off. Take the bottom of your carb off the "bowl" and Where the float it self is, the little thing that sticks out, the thing where you slide the needle onto on the float. Well bend that little flap just a little so it will seal faster and tighter. Hope this helps.


ALso there is no :PIN: to raise the float i suggest what ever pin your refering to put it back where it was.

[crownpoint]

yeah the flap is what i bent, guess it isn't much of a pin but thats what i meant. i've already blown through the gas line and the needle valve that connects to the flap seems to work fine. what i'm wondering is if there is a definate place that the float should be. i don't want to keep taking this apart more then i have to.

[traxxasx]

The float has only only place as to where it should be. Make sure your float is not upside down. ALso i took mine off to replace a jet, i put it back on right. Well i turned my gas on and it was pouring out the bottom on the carb, well i knew the float was right, so wacked the carb with a ( not to hard now) and it fixed it, somtimes the float can get stuck.

[crownpoint]

the float upside down suggestion sounded pretty good but when i flipped it the bowl would not shut over it so it seems that there is only one way to put it on. it seemed to me that the carb was not the problem because it seems fine so what else could it be. maybe it wasn't getting air so things were getting screwed up and it was pulling way too much fuel throught the carb, when i opened the back where the air filter is it looked terrible. i ran it without the filter for a couple minutes and it ran much better. i think this is probably my problem. so i have another question.

whats the best way to clean one and how do i know when i have to buy a new one?

[traxxasx]

I highy doubt your problem of overfloding gas is because your filter. You needle is npt seating right your carb is not stoping the gas, which is couaing it to overfill the carb. Th best way to clean the filters is to take the actual filter off the cage, then use dish soap and wash it real good with water. Let it dry then take some motor oil and pour oil all over it till its soaked then squeeze the extra oil out like a wet shirt and then reinstall it. They last until the rip.

[crownpoint]

thanks i'll clean it and give it a shot. if the problem persists i am going to try replacing the needle. i am running out of things is could be. the upside of this is i am learning more then i wanted to about these carbs...

[Unclediezel]

Sounds like the float is leaking. If there is a leak in the float it will sink to the bottom of the bowl and it wont shut th gas off. Blowing into the carb is the right thing to "Bench Test " it ---but it doesnt simulate actual gasoline in the bowl.
Get a bucket of water, take the float out of the carb and leave it in the bucket overnight. it shoulnt sink at all. if it does -replace the float.

[tolowhb]

Hello, Im not trying to thread jack you, but I am similar situation (although I have replaced my carb but no luck!) Any ways for Air/fuel mix is it the screw on the bottom of the carb???

[Erics350x]

yes the mixture screw is on the bottom of the carb.
also if youre gas cap isnt venting the tank will pressurize , causing the carb to leak fuel.
the best way i found to set a float is to take the bowl off , turn the carb upside down and set the float where its level when closed.

[traxxasx]

Hello, Im not trying to thread jack you, but I am similar situation (although I have replaced my carb but no luck!) Any ways for Air/fuel mix is it the screw on the bottom of the carb???

No its not, its the big one on the left side that you can twist with your finger and it also have a philips slow so you can use a screwdriver, and there is a spring on it to tension it so it wont move.

[tolowhb]

No its not, its the big one on the left side that you can twist with your finger and it also have a philips slow so you can use a screwdriver, and there is a spring on it to tension it so it wont move.

I thought that one was the idle screw? Then there is a little one next to it and a screw for the bowl drain. And one more on the very bottom of the carb. Correct?

[traxxasx]

I thought that one was the idle screw? Then there is a little one next to it and a screw for the bowl drain. And one more on the very bottom of the carb. Correct?

Yes it is the idle screw, there isent an air/fuel mixture screw. The one on the bottom is to open and close the bottom of the bowl to drain extra fluid.