Carburetor problems...need advice.
- Thread starter MPS
- Start date
Check the float valve and seat.
#17 In this diagram, provided this is the type of carb we are talking about
Carb Diagram
#17 In this diagram, provided this is the type of carb we are talking about
Carb Diagram
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D
diggerdown
Well-known member
It sounds like broken reeds.
M
MPS
Well-known member
Well it drips from the bottom....I think it is coming out of the air side of the carb, then flowing to the bottom then dripping.
M
MPS
Well-known member
Well it is an 86 Indy....I don't think it has reeds.
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MPS
Well-known member
Ya that looks right...what do I check on the float valve and seat? I'm an amateur at this.
I would still agree with Unfair Advantage's post about the needle and seat. it is pretty much the only way fuel can come from the float bowl out of the carb with the throttle closed if the carbeurator is properly assembled. check the little metal plate that the floats move as they rise, the center of the "M" where the metal tab connects to the needle may be bent or the needle may have somehow fallen out or come disconnected from the tab. with the jet needle on the slide fully down into the needle jet tube it would be tough for fuel to leak excessively from that point unless your fuel tank is somehow pressured.
if I am incorrect, I'm sure someone will correct the above diagnosis.....good luck.
M
MPS
Well-known member
Ok I have both carbs off...I am looking through the top off both of them through the main and pilot jets up to the light. I am getting way more light through the bad carb than the good one. So obviously too much gas is coming through and it floods it. I see some sort of mesh looking through the jets, but obviously the mesh is much more deteriorated in the bad carb. So what can I do...do I just buy a new carb?
The needle and seat can be replaced, you unhook the needle from the float plate and it drops out, the seat turns out of the carb body.
If you are looking through the main jets their is no screen, they can be replaced or cleaned. Gas is sucked up through the main jet into the carb throat.
If you are looking through the main jets their is no screen, they can be replaced or cleaned. Gas is sucked up through the main jet into the carb throat.
M
MPS
Well-known member
"with the jet needle on the slide fully down into the needle jet tube" ....sh*t teeroy...I bet that is my problem! I bet my jet needle isn't fully down into the tube! I remember screwing with that when it burnt down. Son of a _____!!!!
thanks guys...I am know becoming edumacated in carbs!
thanks guys...I am know becoming edumacated in carbs!
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The jet needle does not seal or seat in the nozzle, it just regulates how much gas comes through the main jet a part throttle.
Their is no screen on the pilot jet either. The pilot jet will turn out from the bottom with a small flat blade screw driver.
The needle and seat shut the gas off when the float bowl is full. #17 in diagram. If gas is leaking either the needle and seat are not sealing or the floats are not adjusted correctly.
Their is no screen on the pilot jet either. The pilot jet will turn out from the bottom with a small flat blade screw driver.
The needle and seat shut the gas off when the float bowl is full. #17 in diagram. If gas is leaking either the needle and seat are not sealing or the floats are not adjusted correctly.
fix it guy is correct MPS, I was just making the point that fuel couldn't easily flow out of the needle tube (main jet is screwed into the bottom of the tube) with the slide closed. if you see a lot more air looking into where the slide goes, it sounds like you're missing the tube and main jet....odd. and no screen in there that I know of either. can you post a few pics for us if possible?
Get it figured out MPS?.
I've had the same symptoms with older machines, ended up being the float valve and seat, which looked to be in good shape. Switched out with new hardware and was back to the races.
I've had the same symptoms with older machines, ended up being the float valve and seat, which looked to be in good shape. Switched out with new hardware and was back to the races.
G
Gimpster
Guest
Just in case... Is this carb on the cylinder where the fuel pump pulse hose hooks to the crankcase ? A fuel pump diaphram might be bad and it is sucking fuel into the crankcase and spitting it out the carb when cranked over ?
Just a thought
----- Gimpster -----
Just a thought
----- Gimpster -----
M
MPS
Well-known member
I think think this is the most logical scenario right now! I am so frustrated. I just went through the carbs....cleaned the sh*t out of them...adjusted them. Now the fuel is dumping out the other carb, not the side I put the piston in. But when I pull out the plugs and turn it over a mist comes out of the one of the cylinders. The spark is good...the compression is good....and after completely going through the carbs I don't think the carbs are the problem. UUUGH!
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