How to fix a Nikki Carburetor that floods out when sitting. These carburetors are primarily found on Briggs and Stratton Intek Engines. Fuel from a flooding carburetor will drain into the cylinder and seep past the rings into the crankcase and mix with the oil, thinning it and severely compromising the lubricity. If left unchecked it can and often does cause catastrophic engine failure. Nikki Carburetors have a few inexpensive components that can cause flooding issues, replacing them solves the problem the majority of the time.
Cleaning a Nikki carburetor:
Float Bowl gasket (with separate fuel inlet O ring) – B&S 698781 https://amzn.to/2DVGkIm
Float Bowl gasket (with integrated fuel inlet seal) – B&S 695426 https://amzn.to/30pNMF8
Fuel inlet needle – B&S 696136 https://amzn.to/2VQSi01
Airbox to intake O-Ring -B&S 697123 https://amzn.to/2DWT3uz