Today we are working on a Yard Machine lawnmower with a Briggs and Stratton engine. It won’t start. After inspecting the mower we tried to start the mower and found that it started. After running it for a few minutes we found that the carburetor was leaking fuel. Next we cleaned the carburetor and installed a needle and seat kit.

Parts Used:

Needle and Seat 398188
(Paid Link)   https://amzn.to/4z5aMJo

Bowl Gasket 693981
(Paid Link)   https://amzn.to/3VGdhTP

Air Filter Gasket
(Paid Link)  https://amzn.to/4hl5djT

You can also use the carburetor kit below:

Carburetor Kit 498260
(Paid Link)  https://amzn.to/4yYr5aG

Replacement Carburetor Assembly 498170
(Paid Link)  https://amzn.to/4dELIk0

“As an Amazon Associate/Influencer, I earn from qualifying purchases"

Always look up your part numbers by using the model type and code off of your engine to verify you are ordering the correct part numbers.


Tools we used:

To remove the air filter front and rear cover - 8mm driver

To remove the cover on top of the air filter - Philips screw driver

To remove the carburetor - 3/8 socket

To remove the jet on the bottom of the carburetor - 1/2 socket

To install the carburetor seat we used a welding tip cleaner and a Allen wrench



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