Replace needle and seat??

[Rls8836]

Sorry don’t where to post this so I’m asking here. How do you remove the seat in a carburetor to replace with a new needle and seat on my carburetor. This is a 5.5 horsepower motor on my granddaughters goKart. It’s not a Briggs and Stratton but resembles one. Someone told me it might be a predator engine. I’ve never removed the seat in a carburetor and want to know the way to do it. Thankyou in advance

 

[Scrubcadet10]

If it's a predator, it may not have a removable seat, or it may have a brass seat. some engines use a all metal needle and rubber seat, some use a metal needle with a rubber (viton) tip with a brass seat.
We'll need more information to give you any exact procedures or proper repair parts

 

[Rls8836]

If it's a predator, it may not have a removable seat, or it may have a brass seat. some engines use a all metal needle and rubber seat, some use a metal needle with a rubber (viton) tip with a brass seat.
We'll need more information to give you any exact procedures or proper repair parts

Ok tomorrow I’ll go look at the engine, what info you need

 

[Scrubcadet10]

Ok tomorrow I’ll go look at the engine, what info you need

If you can find it, a model number. IF it's a briggs and stratton, it will be stamped into the valve cover, if it's a predator or "Honda clone" motor, there should be some numbers stamped into the back of the block.

 

[Scrubcadet10]

Pictures could be helpful too.

 

[Bertrrr]

Remove the carb, turn upside down and blow into the fuel port , if you can't blow through it the needle and seat are ok, When you turn it right side up you should be able to blow through it , this will eliminate the needle / seat or tell if they're bad

 

[StarTech]

Just blowing in without using a pressure gauge is just about as useful as tits on a boar hog. I use a tester and do a 30 min leak down to verify that the float needle valve and seat are sealing.

 

[Bertrrr]

I've done it lots of times it's a good initial test - never went any further with pressure gauges etc. but sure it's a more accurate test.

 

[StarTech]

Personally I don't like the taste of gasoline. Maybe it is just my taste. But pressure gauge you if the seal is holding within the design limits but I never to blow enough to hit 7-10 psi for fuel pump setup nor 3-5 psi for gravity setups.

 

[Bertrrr]

Yeah , I use a clean hose to blow through to keep gas outa my mouth, you'll know right away if it's a bad seat. Seems cheaper these days to change the whole carb rather than a repair kit.