Lower Unit Drain Plug Screw Kit – Fits Yamaha 40HP-300HP (Replaces 90340-08002, 90430-08020, 688-45341-10-00) 85hp or difficulty starting the engine

or difficulty starting the engine due to fuel starvation

Clean all metal parts thoroughly with a dedicated carburetor cleaner

ensuring reliable performance by regulating coolant flow at a precise 60°C (140°F)

Overall Diameter: 90 mm (3

Lower Unit Drain Plug Screw Kit – Fits Yamaha 40HP-300HP (Replaces 90340-08002, 90430-08020, 688-45341-10-00) 85hp or difficulty starting the engineProduct Details This Lower Unit Drain Plug Screw Kit is designed for Yamaha outboard engines ranging from 40HP to 300HP. It provides a complete straight screw plug assembly for lower unit oil maintenance, fitting most engines in this horsepower range. Always verify fitment by matching your original part number rather than relying solely on engine horsepower. This kit directly replaces Yamaha OEM part numbers 90340 08002, 90430 08020, and 688 45341 10