3 Hp Briggs Flatty Need Help Adjusting Flo Jet

[MassD]

I recently picked up a 3hp Flo Jet Briggs and the darn thing wont idle. I dont know where the idle screw is and im not sure how to adjust it. Any good starting points for an all stock 3hp briggs?

 

[Richard Trotter]

Both adjustments should be gently screwed in until seated, then back out 1 1/2 turns. Once motor is started and warmed up, adjust high speed until it runs good. Then adjust idle for best idle.

 

[metal man]

Disassembly of Briggs and Stratton Medium Two-Piece Flo-jet Carburetor try reading this and it will give you a idea how to clean and set up :thumbsup: . good carbs when you get them set up

 

[Richard Trotter]

There is a very small hole in the emulsion tube (circled green in pic). This is almost always plugged if a carb has been sitting a while. A very fine pin may be needed to open this hole. Make sure not to touch or scratch the threads on the side of the bore for the emulsion tube.

 

[Richard Trotter]

forgot to add pic of emulsion tube. small hole circled in green is often plugged in carb that has been sitting.

 

[MassD]

Wow sounds good i will try it now!

 

[MassD]

Okay i did 1.5 turns out and everything is clean but it wont seem to idle down. and i turned the idle screw all the way down and all the way loose and nothing

 

[buckeye]

Is it clean?

 

[MassD]

i cleaned the bowl the needle and seat the bowl and stuck the carb cleaner in all the oraphisis i could, i didnt take the emuslion tube out though

 

[buckeye]

Man that baby should work. Try 1 1/4 or just fiddle with it. Not much else it could be. You have good spark right? TRK would be able to tell ya. Hang in there. It will work.

 

[MassD]

It starts up and goes fine, it moves pretty well for a 3hp it just wont idle down! I turn the screw all the way in and it idles up and all the way out and it still does't idle down. I dont take it out but its out a lot, the thing should at least die out or something

 

[mr.modified]

Your talking about just changing the mixture right? Did you set the idle screw down? (screw on the throttle it self)

 

[MassD]

i have not touched that screw due to the screwy throttle set up the screw does not sit flush on the throttle bracket:doah:

 

[buckeye]

Well there you go. That was my next question. Fix it somehow.

 

[Richard Trotter]

If you took the bowl off without removing the emulsion tube, there is a chance you damaged the emulsion tube. Make sure it is in the slot on the inside of the carb. This end of the tube feeds fuel to the idle jet. If this isn't in the slot the idle screw won't do anything.

 

[miked]

the best way is to take it apart and give a good cleaning using a piece of thin wire to clean out all the holes but a trick i use that works alot is take out the tube from the bootom of the bowl and clear it out with a compressor. this has worked quite a few times on a few generators i have done but if the carb is filthy it will have to be taken apart and cleaned

 

[MassD]

It runs!!! and it runs well to, got it figured out and its putting away. Do e3 spark plugs make a difference?

 

[buckeye]

What was the solution?

 

[mr.modified]

Do e3 spark plugs make a difference?

At least 20 hp... Ok, not really no.

 

[MassD]

Haha the solution was fabricating a new throttle bracket! And every little bit counts i guess maybe ill spring for one!