YAMAHA AIR SCREW 679-14923-00

Function and technical context

This screw forms part of the critical fastening and assembly systems of Yamaha engines, ensuring the structural integrity of vital components in the air intake. Their correct placement and tension ensures that the air ducts and filters maintain an airtight seal, preventing the entry of water, dust and contaminants into the engine supply system. Poor clamping allows abrasive particles to access the carburetor and injectors, compromising engine performance and accelerating internal cylinder wear.

When to replace this part?

It is advisable to inspect and replace this screw when symptoms of visible loosening, corrosion due to exposure to saline or fresh water environments are observed, or when annual maintenance of the filtration and intake systems is performed. Preventive replacement during disassembly of the air bell ensures that the duct fastening remains intact throughout the sailing season, avoiding vibrations that cause secondary damage to adjacent hoses and connections. Performing this replacement routinely is a recommended maintenance practice that prevents costly repairs resulting from water or sediment entering the power circuit.

Engine Compatibility

Equivalent manufacturer part numbers