Where does the jet that fell out when I removed the float go

Hi I I used to repair mowers I have never come across a main jet falling out. U mention U took the float of the only thing that can fall of is the needle that controls the flow of petrol ..to replace it the pointy end sits in the brass seat some needles have a rubber end this end sits in the brass seat then U CAN fit the float.hope this helps

Sounds like carburettor problem, blocked idling jet located inside carb, remove the float bowl (bottom section of carb) The main jet is the one in the centre (+ - 6 - 8mm in diameter) and the idler next to it (smaller hole + - 3 - 4mm) use a decent small flat tip screw driver to remove the idling jet (and do not slip) as this will damage the brass locating slot of the idling jet, once removed blow compressed air through the idling jet hole( about 0.3mm hole) or use a strand of wire from steel wire brush( welding brush) to dislodge the blockage in the idling jet. NOTE: Carefully remove the float bowl and do not to let the float pin holding the float slide out as you will loose the needle located under the float! You should be able to see through the tiny hole of the jet by holding it up to light. Assembly should not be a problem, just backtrack.
Let me know?
Regards
Phillip

Is it a Nikki carb? The little brass piece is the main jet and goes in the long tube in the center of the plastic piece that holds the float and float needle. It is inserted from bottom side and seats in the top of the tube.

Remove carburettor bowl and the pilot jet is just forward of the main jet and emulsion tube. If pilot jet is blocked either carb clean or strand of electrical wire will clear it then blow out with compressed air. Fuel mixture screw is just forward of float bowl. Start at 1& half turns out from seated.

that's a small needle there should be a little spot for it to slid on the bottom of float goes down in the hole under the float

Where is it leaking from? The bowl gasket or the vent tube.if its the vent tube the needle an seats r sticking or not seating or float level got out of adjutment or pin fell out.if its the bowl gasket......well u know!

Take carbs off the bike drain any fuel that might still be in carbs,remove black top and the spring,carefully remove the rubber diaphragm,the slide and jet needle will come out,turn them upside down,remove float bowl,remove float,remove the little brass jets, the smallest one is the pilot(idle) jet,the larger one is main jet,then there is a needle jet,soak in carb clean if possible,if no clean then small bread tie to clear the holes.(carb kit),do one at a time so not to get parts mixed up.

Gas running out the puke tube indicates debris in the float valve(Stuck Float)
some just tap the side of the carb and it passes through, some take the carb apart, clean it and reassemble it.

In your case, remove the carb, remove the bowl from the carb., remove the float pin, then the float, and the float valve/needle is hanging on the float tab.

now blow through the tube that the gas line hooks to with compress air to clean out that passage.
air should blow out the hole that the float valve was in.

Reassemble.

You will not have to remove any jets to clean the float bowl chamber.

i suggest you blow through every opening on that carb while you have it off to make sure nothing is clogged.

Your float will now shut off the gas flow like it should, and quit coming out the puke tube.

Bad gas can cause the engine to surge, but also the carb bowl and jets need cleaning. I usually drain the gas, remove the bowl, wipe inside the bowl , and then use a carb cleaner to spray the float and jet/s. The float may be hanging up. It would be best just remove the gas and clean the bowl area and float/jets. I wouldn't think replacing the carb. is the problem.

pull carb and clean jets