This is part 1 of 2 videos that will show you how to clean out the carb on a non-running 550EX series B&S motor.
Link to part 2: https://youtu.be/joDmD0oOlJ0
8mm socket w/ ratchet
ratchet extension, at least 3″
T-15 torx bit screwdriver
various smaller flat-head screwdrivers
Carburetor part# 799584
Main jet part# 592792