300h Service Kit Mercury 40 - 50 - 60hp EFI Bigfoot and CT 8M0090559

The Mercury 300-Hour Maintenance Kit 8M0090559 is an original Mercury Precision Parts Service Kit that combines all the spare parts required for the 300-hour inspection of certain Mercury outboard motors in one convenient package.

The kit is specifically designed for Mercury 4-cylinder 40–60 hp FourStroke EFI outboard motors with BigFoot or Command Thrust gearboxes, serial number 1C000001 and later. It contains all required wear and maintenance parts, so no individual orders are necessary.

Regular 300-hour maintenance is crucial for reliability, longevity, and optimal engine performance. With this kit, the service can be conveniently performed using standard workshop tools, always in accordance with the specifications in the respective engine manual.