force 125 carb question

[fisheymikey]

hi all!

I have a force 125 1988

I want to service my carbs to make sure they will be running great this spring.

I checked the float and one of them cracked!! it have a separation in it and probably did cause some running problems.

but my question is what would you you do as a procedure to assure all carburetors are working great.

how do I know if the seat or the needles are ok... the needles seam ok but would like to change them is there a briggs &stranton replacement or other company

any ideas would be great

mike

 

[fisheymikey]

Re: force 125 carb question

here is also the carburetor idle screws I wanted to know the one on the left has a small defect at the tip

does that effect anything?

 

[Frank Acampora]

Re: force 125 carb question

If the float is the black plastic foam kind, it is solid and a crack should not affect its performance. However, a crack can spread and result in float failure so replacement is mandatory.

If needles are solid tipped, they need not be replaced unless there is a very obvious defect. Remember all carbs use either a steel needle with rubber seat or rubber tipped needle with plain seat. If the rubber is bad, then yes needles need to be replaced. I think they come in a rebuild kit along with seats.

It is difficult to tell from the photo but all three low speed needles look serviceable to me. If there is a pronounced groove from over-tightening, then yes, the needle is no good.

Unless severely corroded or damaged, almost all the carbs I have worked on needed only disassembly and cleaning while a couple needed rubber seats replaced.. Not having seen your carbs, other than replacing the float, that is all I would do. To check inlet needles and seats, invert the carb and blow into the inlet fitting. The float should seal against your pressure just from its own weight. If it leaks at all, rubber tipped needles or seats need replacement. If you have rubber seats, the side with the lip goes up against the needle tip however, it is possible to reverse them and adjust float level to gain a little more life from them.

And BTW: Floats for ALL the larger engines --20 and up--are all the same size so the float from any old carb laying around will fit. One caveat though: Some floats are white plastic and not as good, while some floats also have a spring at the pin end to help rising. If you swap in these floats, do it as a pair.